Actinide Production in the Neutron-rich Ejecta of a Neutron Star Merger

Holmbeck, Erika M.; Sprouse, Trevor M.; Mumpower, Matthew R.; Vassh, Nicole; Surman, Rebecca; Beers, Timothy C.; Kawano, Toshihiko

doi:10.3847/1538-4357/aaefef

Actinide Production in the Neutron-rich Ejecta of a Neutron Star Merger

Journal Article · Mon Dec 31 00:00:00 EST 2018 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/1538-4357/aaefef· OSTI ID:1768516

^[1]; ^[2]; ^[3]; ^[2]; ^[1]; ^[1]; ^[4]

Univ. of Notre Dame, IN (United States); Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States)
Univ. of Notre Dame, IN (United States)
Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The rapid neutron-capture ("r-") process is responsible for synthesizing many of the heavy elements observed in both the solar system and Galactic metal-poor halo stars. Simulations of r-process nucleosynthesis can reproduce abundances derived from observations with varying success, but so far they fail to account for the observed overenhancement of actinides, present in about 30% of r-process-enhanced stars. In this work, we investigate actinide production in the dynamical ejecta of a neutron star merger (NSM) and explore whether varying levels of neutron-richness can reproduce the actinide boost. We also investigate the sensitivity of actinide production on nuclear physics properties: fission distribution, β-decay, and mass model. For most cases, the actinides are overproduced in our models if the initial conditions are sufficiently neutron-rich for fission cycling. Here, we find that actinide production can be so robust in the dynamical ejecta that an additional lanthanide-rich, actinide-poor component is necessary in order to match observations of actinide-boost stars. We present a simple actinide-dilution model that folds in estimated contributions from two nucleosynthetic sites within a merger event. Our study suggests that while the dynamical ejecta of an NSM are likely production sites for the formation of actinides, a significant contribution from another site or sites (e.g., the NSM accretion disk wind) is required to explain abundances of r-process-enhanced, metal-poor stars.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC). Nuclear Physics (NP)

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396; AC52-07NA27344; SC0013039; SC0018232

OSTI ID:: 1768516

Report Number(s):: LA-UR--18-29300

Journal Information:: The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 1 Vol. 870; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

References (106)

Beta-delayed fission and neutron emission: Consequences for the astrophysicalr-process and the age of the galaxy Thielemann, F. -K.; Metzinger, J.; Klapdor, H. V. Zeitschrift f�r Physik A Atoms and Nuclei, Vol. 309, Issue 4 https://doi.org/10.1007/BF01413833	journal	December 1983
The R-process and nucleochronology Cowan, John J.; Thielemann, Friedrich-Karl; Truran, James W. Physics Reports, Vol. 208, Issue 4-5 https://doi.org/10.1016/0370-1573(91)90070-3	journal	November 1991
R-process nucleosynthesis and nuclei far from the region of β-stability Kodama, Takeshi; Takahashi, Kohji Nuclear Physics A, Vol. 239, Issue 3 https://doi.org/10.1016/0375-9474(75)90381-4	journal	March 1975
Nuclear ground-state masses and deformations: FRDM(2012) Möller, P.; Sierk, A. J.; Ichikawa, T. Atomic Data and Nuclear Data Tables, Vol. 109-110 https://doi.org/10.1016/j.adt.2015.10.002	journal	May 2016
Nuclear properties for astrophysical and radioactive-ion-beam applications (II) Möller, P.; Mumpower, M. R.; Kawano, T. Atomic Data and Nuclear Data Tables, Vol. 125 https://doi.org/10.1016/j.adt.2018.03.003	journal	January 2019
The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries Arnould, M.; Goriely, S.; Takahashi, K. Physics Reports, Vol. 450, Issue 4-6 https://doi.org/10.1016/j.physrep.2007.06.002	journal	September 2007
What are the astrophysical sites for the r-process and the production of heavy elements? Thielemann, F. -K.; Arcones, A.; Käppeli, R. Progress in Particle and Nuclear Physics, Vol. 66, Issue 2 https://doi.org/10.1016/j.ppnp.2011.01.032	journal	April 2011
New insights into the astrophysical r-process Mathews, G. J.; Cowan, J. J. Nature, Vol. 345, Issue 6275 https://doi.org/10.1038/345491a0	journal	June 1990
Identification of strontium in the merger of two neutron stars Watson, Darach; Hansen, Camilla J.; Selsing, Jonatan Nature, Vol. 574, Issue 7779 https://doi.org/10.1038/s41586-019-1676-3	journal	October 2019
The Hamburg/ESO R-process Enhanced Star survey (HERES): VII. Thorium abundances in metal-poor stars Ren, J.; Christlieb, N.; Zhao, G. Astronomy & Astrophysics, Vol. 537 https://doi.org/10.1051/0004-6361/201118241	journal	January 2012
Planck 2013 results. I. Overview of products and scientific results Ade, P. A. R.; Aghanim, N.; Alves, M. I. R. Astronomy & Astrophysics, Vol. 571 https://doi.org/10.1051/0004-6361/201321529	journal	October 2014
The Hamburg/ESO R-process Enhanced Star survey (HERES): VIII. The r+s star HE 1405−0822⋆⋆ Cui, W. Y.; Sivarani, T.; Christlieb, N. Astronomy & Astrophysics, Vol. 558 https://doi.org/10.1051/0004-6361/201321597	journal	October 2013
The Hamburg/ESO R-process Enhanced Star survey (HERES): X. HE 2252−4225, one more r-process enhanced and actinide-boost halo star Mashonkina, L.; Christlieb, N.; Eriksson, K. Astronomy & Astrophysics, Vol. 569 https://doi.org/10.1051/0004-6361/201424017	journal	September 2014
The first direct double neutron star merger detection: Implications for cosmic nucleosynthesis Rosswog, S.; Sollerman, J.; Feindt, U. Astronomy & Astrophysics, Vol. 615 https://doi.org/10.1051/0004-6361/201732117	journal	July 2018
Neutron star mergers versus core-collapse supernovae as dominant r-process sites in the early Galaxy Argast, D.; Samland, M.; Thielemann, F. -K. Astronomy & Astrophysics, Vol. 416, Issue 3 https://doi.org/10.1051/0004-6361:20034265	journal	March 2004
The Hamburg/ESO R-process enhanced star survey (HERES): II. Spectroscopic analysis of the survey sample Barklem, P. S.; Christlieb, N.; Beers, T. C. Astronomy & Astrophysics, Vol. 439, Issue 1 https://doi.org/10.1051/0004-6361:20052967	journal	July 2005
Nuclear Reactions in Stars and Nucleogenesis Cameron, A. G. W. Publications of the Astronomical Society of the Pacific, Vol. 69 https://doi.org/10.1086/127051	journal	June 1957
Decompression of initially cold neutron star matter - A mechanism for the r-process? Meyer, Bradley S. The Astrophysical Journal, Vol. 343 https://doi.org/10.1086/167702	journal	August 1989
R-process nucleosynthesis in the high-entropy supernova bubble Meyer, B. S.; Mathews, G. J.; Howard, W. M. The Astrophysical Journal, Vol. 399 https://doi.org/10.1086/171957	journal	November 1992
The r-process and neutrino-heated supernova ejecta Woosley, S. E.; Wilson, J. R.; Mathews, G. J. The Astrophysical Journal, Vol. 433 https://doi.org/10.1086/174638	journal	September 1994
Black-hole-neutron-star collisions Lattimer, J. M.; Schramm, D. N. The Astrophysical Journal, Vol. 192 https://doi.org/10.1086/181612	journal	September 1974
[CLC][ITAL]r[/ITAL][/CLC]-Process in Neutron Star Mergers Freiburghaus, C.; Rosswog, S.; Thielemann, F. -K. The Astrophysical Journal, Vol. 525, Issue 2 https://doi.org/10.1086/312343	journal	November 1999
The r ‐Process in the Neutrino Winds of Core‐Collapse Supernovae and U‐Th Cosmochronology Wanajo, Shinya; Itoh, Naoki; Ishimaru, Yuhri The Astrophysical Journal, Vol. 577, Issue 2 https://doi.org/10.1086/342230	journal	October 2002
Thorium and Uranium Chronometers Applied to CS 31082‐001 Schatz, Hendrik; Toenjes, Ralf; Pfeiffer, Bernd The Astrophysical Journal, Vol. 579, Issue 2 https://doi.org/10.1086/342939	journal	November 2002
Neutrinos and Nucleosynthesis in Gamma‐Ray Burst Accretion Disks Surman, Rebecca; McLaughlin, Gail C. The Astrophysical Journal, Vol. 603, Issue 2 https://doi.org/10.1086/381672	journal	March 2004
Charged-Particle and Neutron-Capture Processes in the High-Entropy wind of Core-Collapse Supernovae Farouqi, K.; Kratz, K. -L.; Pfeiffer, B. The Astrophysical Journal, Vol. 712, Issue 2 https://doi.org/10.1088/0004-637X/712/2/1359	journal	March 2010
Core-Collapse Supernova Equations of State Based on Neutron star Observations Steiner, A. W.; Hempel, M.; Fischer, T. The Astrophysical Journal, Vol. 774, Issue 1 https://doi.org/10.1088/0004-637X/774/1/17	journal	August 2013
Neutron-Capture Nucleosynthesis in the First Stars Roederer, Ian U.; Preston, George W.; Thompson, Ian B. The Astrophysical Journal, Vol. 784, Issue 2 https://doi.org/10.1088/0004-637X/784/2/158	journal	March 2014
A HIGH-ENTROPY-WIND r -PROCESS STUDY BASED ON NUCLEAR-STRUCTURE QUANTITIES FROM THE NEW FINITE-RANGE DROPLET MODEL FRDM(2012) Kratz, Karl-Ludwig; Farouqi, Khalil; Möller, Peter The Astrophysical Journal, Vol. 792, Issue 1 https://doi.org/10.1088/0004-637X/792/1/6	journal	August 2014
THE ROLE OF FISSION IN NEUTRON STAR MERGERS AND ITS IMPACT ON THE r -PROCESS PEAKS Eichler, M.; Arcones, A.; Kelic, A. The Astrophysical Journal, Vol. 808, Issue 1 https://doi.org/10.1088/0004-637X/808/1/30	journal	July 2015
ENRICHMENT OF r -PROCESS ELEMENTS IN DWARF SPHEROIDAL GALAXIES IN CHEMO-DYNAMICAL EVOLUTION MODEL Hirai, Yutaka; Ishimaru, Yuhri; Saitoh, Takayuki R. The Astrophysical Journal, Vol. 814, Issue 1 https://doi.org/10.1088/0004-637X/814/1/41	journal	November 2015
The jina Reaclib Database: its Recent Updates and Impact on Type-I X-Ray Bursts Cyburt, Richard H.; Amthor, A. Matthew; Ferguson, Ryan The Astrophysical Journal Supplement Series, Vol. 189, Issue 1 https://doi.org/10.1088/0067-0049/189/1/240	journal	June 2010
The role of weak interactions in dynamic ejecta from binary neutron star mergers Martin, D.; Perego, A.; Kastaun, W. Classical and Quantum Gravity, Vol. 35, Issue 3 https://doi.org/10.1088/1361-6382/aa9f5a	journal	January 2018
The NUBASE2016 evaluation of nuclear properties Audi, G.; Kondev, F. G.; Wang, Meng Chinese Physics C, Vol. 41, Issue 3 https://doi.org/10.1088/1674-1137/41/3/030001	journal	March 2017
r -PROCESS NUCLEOSYNTHESIS IN DYNAMICALLY EJECTED MATTER OF NEUTRON STAR MERGERS Goriely, Stephane; Bauswein, Andreas; Janka, Hans-Thomas The Astrophysical Journal, Vol. 738, Issue 2 https://doi.org/10.1088/2041-8205/738/2/L32	journal	August 2011
PRODUCTION OF ALL THE r -PROCESS NUCLIDES IN THE DYNAMICAL EJECTA OF NEUTRON STAR MERGERS Wanajo, Shinya; Sekiguchi, Yuichiro; Nishimura, Nobuya The Astrophysical Journal, Vol. 789, Issue 2 https://doi.org/10.1088/2041-8205/789/2/L39	journal	June 2014
The multimessenger picture of compact object encounters: binary mergers versus dynamical collisions Rosswog, S.; Piran, T.; Nakar, E. Monthly Notices of the Royal Astronomical Society, Vol. 430, Issue 4 https://doi.org/10.1093/mnras/sts708	journal	February 2013
The electromagnetic signals of compact binary mergers Piran, T.; Nakar, E.; Rosswog, S. Monthly Notices of the Royal Astronomical Society, Vol. 430, Issue 3 https://doi.org/10.1093/mnras/stt037	journal	February 2013
Neutrino-driven winds from neutron star merger remnants Perego, A.; Rosswog, S.; Cabezon, R. M. Monthly Notices of the Royal Astronomical Society, Vol. 443, Issue 4 https://doi.org/10.1093/mnras/stu1352	journal	August 2014
Impact of weak interactions of free nucleons on the r-process in dynamical ejecta from neutron star mergers Goriely, S.; Bauswein, A.; Just, O. Monthly Notices of the Royal Astronomical Society, Vol. 452, Issue 4 https://doi.org/10.1093/mnras/stv1526	journal	August 2015
Representative galaxy age–metallicity relationships Piatti, Andrés E.; Aparicio, Antonio; Hidalgo, Sebastián L. Monthly Notices of the Royal Astronomical Society, Vol. 469, Issue 1 https://doi.org/10.1093/mnras/stx1002	journal	April 2017
Signatures of hypermassive neutron star lifetimes on r-process nucleosynthesis in the disc ejecta from neutron star mergers Lippuner, Jonas; Fernández, Rodrigo; Roberts, Luke F. Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 1 https://doi.org/10.1093/mnras/stx1987	journal	August 2017
Kilonova from post-merger ejecta as an optical and near-Infrared counterpart of GW170817 Tanaka, Masaomi; Utsumi, Yousuke; Mazzali, Paolo A. Publications of the Astronomical Society of Japan, Vol. 69, Issue 6 https://doi.org/10.1093/pasj/psx121	journal	October 2017
Systematics of Spontaneous Fission Half-Lives Swiatecki, W. J. Physical Review, Vol. 100, Issue 3 https://doi.org/10.1103/PhysRev.100.937	journal	November 1955
Microscopic mass formulas Duflo, J.; Zuker, A. P. Physical Review C, Vol. 52, Issue 1 https://doi.org/10.1103/PhysRevC.52.R23	journal	July 1995
Fission cycling in a supernova r process Beun, J.; McLaughlin, G. C.; Surman, R. Physical Review C, Vol. 77, Issue 3 https://doi.org/10.1103/PhysRevC.77.035804	journal	March 2008
Production of heavy and superheavy neutron-rich nuclei in neutron capture processes Zagrebaev, V. I.; Karpov, A. V.; Mishustin, I. N. Physical Review C, Vol. 84, Issue 4 https://doi.org/10.1103/PhysRevC.84.044617	journal	October 2011
Fission barriers at the end of the chart of the nuclides Möller, Peter; Sierk, Arnold J.; Ichikawa, Takatoshi Physical Review C, Vol. 91, Issue 2 https://doi.org/10.1103/PhysRevC.91.024310	journal	February 2015
Impact of individual nuclear masses on r -process abundances Mumpower, M. R.; Surman, R.; Fang, D. -L. Physical Review C, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevC.92.035807	journal	September 2015
Nuclear robustness of the r process in neutron-star mergers Mendoza-Temis, Joel de Jesús; Wu, Meng-Ru; Langanke, Karlheinz Physical Review C, Vol. 92, Issue 5 https://doi.org/10.1103/PhysRevC.92.055805	journal	November 2015
Large-scale evaluation of β -decay rates of r -process nuclei with the inclusion of first-forbidden transitions Marketin, T.; Huther, L.; Martínez-Pinedo, G. Physical Review C, Vol. 93, Issue 2 https://doi.org/10.1103/PhysRevC.93.025805	journal	February 2016
Statistical Hauser-Feshbach theory with width-fluctuation correction including direct reaction channels for neutron-induced reactions at low energies Kawano, T.; Capote, R.; Hilaire, S. Physical Review C, Vol. 94, Issue 1 https://doi.org/10.1103/PhysRevC.94.014612	journal	July 2016
Neutron- γ competition for β -delayed neutron emission Mumpower, M. R.; Kawano, T.; Möller, P. Physical Review C, Vol. 94, Issue 6 https://doi.org/10.1103/PhysRevC.94.064317	journal	December 2016
Symmetric and standard matter neutrino resonances above merging compact objects Malkus, A.; McLaughlin, G. C.; Surman, R. Physical Review D, Vol. 93, Issue 4 https://doi.org/10.1103/PhysRevD.93.045021	journal	February 2016
r -process nucleosynthesis from matter ejected in binary neutron star mergers Bovard, Luke; Martin, Dirk; Guercilena, Federico Physical Review D, Vol. 96, Issue 12 https://doi.org/10.1103/PhysRevD.96.124005	journal	December 2017
New Finite-Range Droplet Mass Model and Equation-of-State Parameters Möller, Peter; Myers, William D.; Sagawa, Hiroyuki Physical Review Letters, Vol. 108, Issue 5 https://doi.org/10.1103/PhysRevLett.108.052501	journal	January 2012
New Fission Fragment Distributions and r -Process Origin of the Rare-Earth Elements Goriely, S.; Sida, J. -L.; Lemaître, J. -F. Physical Review Letters, Vol. 111, Issue 24 https://doi.org/10.1103/PhysRevLett.111.242502	journal	December 2013
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral Abbott, B. P.; Abbott, R.; Abbott, T. D. Physical Review Letters, Vol. 119, Issue 16 https://doi.org/10.1103/PhysRevLett.119.161101	journal	October 2017
Synthesis of the Elements in Stars Burbidge, E. Margaret; Burbidge, G. R.; Fowler, William A. Reviews of Modern Physics, Vol. 29, Issue 4 https://doi.org/10.1103/RevModPhys.29.547	journal	October 1957
On the astrophysical robustness of the neutron star merger r-process: Robust r-process in neutron star mergers Korobkin, O.; Rosswog, S.; Arcones, A. Monthly Notices of the Royal Astronomical Society, Vol. 426, Issue 3 https://doi.org/10.1111/j.1365-2966.2012.21859.x	journal	October 2012
Light curves of the neutron star merger GW170817/SSS17a: Implications for r-process nucleosynthesis Drout, M. R.; Piro, A. L.; Shappee, B. J. Science, Vol. 358, Issue 6370 https://doi.org/10.1126/science.aaq0049	journal	October 2017
Electromagnetic evidence that SSS17a is the result of a binary neutron star merger Kilpatrick, C. D.; Foley, R. J.; Kasen, D. Science, Vol. 358, Issue 6370 https://doi.org/10.1126/science.aaq0073	journal	October 2017
Early spectra of the gravitational wave source GW170817: Evolution of a neutron star merger Shappee, B. J.; Simon, J. D.; Drout, M. R. Science, Vol. 358, Issue 6370 https://doi.org/10.1126/science.aaq0186	journal	October 2017
Fission and the r-process: Competition between neutron-induced and beta-delayed fission Panov, I. V.; Thielemann, F. -K. Astronomy Letters, Vol. 30, Issue 9 https://doi.org/10.1134/1.1795953	journal	September 2004
Have superheavy elements been produced in nature? Petermann, I.; Langanke, K.; Martínez-Pinedo, G. The European Physical Journal A, Vol. 48, Issue 9 https://doi.org/10.1140/epja/i2012-12122-6	journal	September 2012
Black-Hole-Neutron-Star Collisions Lattimer, James M.; Schramm, David N. The Big Bang and Other Explosions in Nuclear and Particle Astrophysics https://doi.org/10.1142/9789812831538_0073	book	June 1996
The Discovery and Analysis of Very Metal-Poor Stars in the Galaxy Beers, Timothy C.; Christlieb, Norbert Annual Review of Astronomy and Astrophysics, Vol. 43, Issue 1 https://doi.org/10.1146/annurev.astro.42.053102.134057	journal	September 2005
Neutron-Capture Elements in the Early Galaxy Sneden, Christopher; Cowan, John J.; Gallino, Roberto Annual Review of Astronomy and Astrophysics, Vol. 46, Issue 1 https://doi.org/10.1146/annurev.astro.46.060407.145207	journal	September 2008
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral Abbott, B. P.; Abbott, R.; Abbott, T. D. College Park : American Physical Society https://doi.org/10.15488/4798	other	January 2017
DETAILED CHEMICAL ABUNDANCES IN THE r -PROCESS-RICH ULTRA-FAINT DWARF GALAXY RETICULUM 2 Roederer, Ian U.; Mateo, Mario; Iii, John I. Bailey The Astronomical Journal, Vol. 151, Issue 3 https://doi.org/10.3847/0004-6256/151/3/82	journal	February 2016
COMPLETE ELEMENT ABUNDANCES OF NINE STARS IN THE r -PROCESS GALAXY RETICULUM II Ji, Alexander P.; Frebel, Anna; Simon, Joshua D. The Astrophysical Journal, Vol. 830, Issue 2 https://doi.org/10.3847/0004-637X/830/2/93	journal	October 2016
The Origin of r -process Elements in the Milky Way Côté, Benoit; Fryer, Chris L.; Belczynski, Krzysztof The Astrophysical Journal, Vol. 855, Issue 2 https://doi.org/10.3847/1538-4357/aaad67	journal	March 2018
The R -process Alliance: First Release from the Southern Search for R -process-enhanced Stars in the Galactic Halo Hansen, Terese T.; Holmbeck, Erika M.; Beers, Timothy C. The Astrophysical Journal, Vol. 858, Issue 2 https://doi.org/10.3847/1538-4357/aabacc	journal	May 2018
The R -Process Alliance: First Release from the Northern Search for r -process-enhanced Metal-poor Stars in the Galactic Halo Sakari, Charli M.; Placco, Vinicius M.; Farrell, Elizabeth M. The Astrophysical Journal, Vol. 868, Issue 2 https://doi.org/10.3847/1538-4357/aae9df	journal	November 2018
β -delayed Fission in r -process Nucleosynthesis Mumpower, M. R.; Kawano, T.; Sprouse, T. M. The Astrophysical Journal, Vol. 869, Issue 1 https://doi.org/10.3847/1538-4357/aaeaca	journal	December 2018
SkyNet: A Modular Nuclear Reaction Network Library Lippuner, Jonas; Roberts, Luke F. The Astrophysical Journal Supplement Series, Vol. 233, Issue 2 https://doi.org/10.3847/1538-4365/aa94cb	journal	December 2017
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. II. UV, Optical, and Near-infrared Light Curves and Comparison to Kilonova Models Cowperthwaite, P. S.; Berger, E.; Villar, V. A. The Astrophysical Journal, Vol. 848, Issue 2 https://doi.org/10.3847/2041-8213/aa8fc7	journal	October 2017
The R -Process Alliance: 2MASS J09544277+5246414, the Most Actinide-enhanced R -II Star Known Holmbeck, Erika M.; Beers, Timothy C.; Roederer, Ian U. The Astrophysical Journal, Vol. 859, Issue 2 https://doi.org/10.3847/2041-8213/aac722	journal	June 2018
Californium-254 and Kilonova Light Curves Zhu, Y.; Wollaeger, R. T.; Vassh, N. The Astrophysical Journal, Vol. 863, Issue 2 https://doi.org/10.3847/2041-8213/aad5de	journal	August 2018
The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries Arnould, M.; Goriely, S.; Takahashi, K. arXiv https://doi.org/10.48550/arxiv.0705.4512	text	January 2007
Charged-Particle and Neutron-Capture Processes in the High-Entropy Wind of Core-Collapse Supernovae Farouqi, K.; Kratz, K. -L.; Pfeiffer, B. arXiv https://doi.org/10.48550/arxiv.1002.2346	text	January 2010
R-Process Nucleosynthesis in Dynamically Ejected Matter of Neutron Star Mergers Goriely, Stephane; Bauswein, Andreas; Janka, H. -Thomas arXiv https://doi.org/10.48550/arxiv.1107.0899	text	January 2011
The Electromagnetic Signals of Compact Binary Mergers Piran, T.; Nakar, E.; Rosswog, S. arXiv https://doi.org/10.48550/arxiv.1204.6242	text	January 2012
Core-collapse supernova equations of state based on neutron star observations Steiner, Andrew W.; Hempel, Matthias; Fischer, Tobias arXiv https://doi.org/10.48550/arxiv.1207.2184	text	January 2012
Have Superheavy Elements been Produced in Nature? Petermann, I.; Langanke, K.; Martínez-Pinedo, G. arXiv https://doi.org/10.48550/arxiv.1207.3432	text	January 2012
Planck 2013 results. I. Overview of products and scientific results Collaboration, Planck; Ade, P. A. R.; Aghanim, N. arXiv https://doi.org/10.48550/arxiv.1303.5062	text	January 2013
New fission fragment distributions and r-process origin of the rare-earth elements Goriely, S.; Sida, J. -L.; Lemaitre, J. -F. arXiv https://doi.org/10.48550/arxiv.1311.5897	text	January 2013
Neutron-Capture Nucleosynthesis in the First Stars Roederer, Ian U.; Preston, George W.; Thompson, Ian B. arXiv https://doi.org/10.48550/arxiv.1402.4144	text	January 2014
Neutrino-driven winds from neutron star merger remnants Perego, Albino; Rosswog, Stephan; Cabezon, Ruben arXiv https://doi.org/10.48550/arxiv.1405.6730	text	January 2014
The impact of individual nuclear masses on $r$-process abundances Mumpower, M. R.; Surman, R.; Fang, D. -L. arXiv https://doi.org/10.48550/arxiv.1505.07789	text	January 2015
Complete element abundances of nine stars in the r-process galaxy Reticulum II Ji, Alexander P.; Frebel, Anna; Simon, Joshua D. arXiv https://doi.org/10.48550/arxiv.1607.07447	text	January 2016
Signatures of hypermassive neutron star lifetimes on r-process nucleosynthesis in the disk ejecta from neutron star mergers Lippuner, Jonas; Fernández, Rodrigo; Roberts, Luke F. arXiv https://doi.org/10.48550/arxiv.1703.06216	text	January 2017
Early Spectra of the Gravitational Wave Source GW170817: Evolution of a Neutron Star Merger Shappee, B. J.; Simon, J. D.; Drout, M. R. arXiv https://doi.org/10.48550/arxiv.1710.05432	text	January 2017
Electromagnetic Evidence that SSS17a is the Result of a Binary Neutron Star Merger Kilpatrick, Charles D.; Foley, Ryan J.; Kasen, Daniel arXiv https://doi.org/10.48550/arxiv.1710.05434	text	January 2017
Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis Drout, M. R.; Piro, A. L.; Shappee, B. J. arXiv https://doi.org/10.48550/arxiv.1710.05443	text	January 2017
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral Collaboration, The LIGO Scientific; Collaboration, The Virgo arXiv https://doi.org/10.48550/arxiv.1710.05832	text	January 2017
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models Cowperthwaite, P. S.; Berger, E.; Villar, V. A. arXiv https://doi.org/10.48550/arxiv.1710.05840	text	January 2017
Kilonova from post-merger ejecta as an optical and near-infrared counterpart of GW170817 Tanaka, Masaomi; Utsumi, Yousuke; Mazzali, Paolo A. arXiv https://doi.org/10.48550/arxiv.1710.05850	text	January 2017
The R-Process Alliance: 2MASS J09544277+5246414, the Most Actinide-Enhanced R-II Star Known Holmbeck, Erika M.; Beers, Timothy C.; Roederer, Ian U. arXiv https://doi.org/10.48550/arxiv.1805.11925	text	January 2018
Californium-254 and kilonova light curves Zhu, Y.; Wollaeger, R. T.; Vassh, N. arXiv https://doi.org/10.48550/arxiv.1806.09724	text	January 2018
The R-Process Alliance: First Release from the Northern Search for r-Process Enhanced Metal-Poor Stars in the Galactic Halo Sakari, Charli M.; Placco, Vinicius M.; Farrell, Elizabeth M. arXiv https://doi.org/10.48550/arxiv.1809.09156	text	January 2018
The r-process in the neutrino winds of core-collapse supernovae and U-Th cosmochronology Wanajo, Shinya; Itoh, Naoki; Ishimaru, Yuhri arXiv https://doi.org/10.48550/arxiv.astro-ph/0206133	text	January 2002
Neutrinos and Nucleosynthesis in Gamma-Ray Burst Accretion Disks Surman, R.; McLaughlin, G. C. arXiv https://doi.org/10.48550/arxiv.astro-ph/0308004	text	January 2003
The Hamburg/ESO R-process Enhanced Star survey (HERES) II. Spectroscopic analysis of the survey sample Barklem, P. S.; Christlieb, N.; Beers, T. C. arXiv https://doi.org/10.48550/arxiv.astro-ph/0505050	text	January 2005
Microscopic mass formulae Duflo, J.; Zuker, A. P. arXiv https://doi.org/10.48550/arxiv.nucl-th/9404019	text	January 1994
GW170817: Observation of gravitational waves from a binary neutron star inspiral Abbott, B. P.; Abbott, R.; Abbott, T. D. American Physical Society https://doi.org/10.5167/uzh-147231	text	January 2017

Cited By (13)

Kilonovae Metzger, Brian D. Living Reviews in Relativity, Vol. 23, Issue 1 https://doi.org/10.1007/s41114-019-0024-0	journal	December 2019
r -process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos Horowitz, C. J.; Arcones, A.; Côté, B. Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 8 https://doi.org/10.1088/1361-6471/ab0849	journal	July 2019
GW170817 --the first observed neutron star merger and its kilonova: Implications for the astrophysical site of the r-process Siegel, Daniel M. The European Physical Journal A, Vol. 55, Issue 11 https://doi.org/10.1140/epja/i2019-12888-9	journal	November 2019
The Common Envelope Jet Supernova (CEJSN) r -process Scenario Grichener, Aldana; Soker, Noam The Astrophysical Journal, Vol. 878, Issue 1 https://doi.org/10.3847/1538-4357/ab1d5d	journal	June 2019
Probing the Production of Actinides under Different r-process Conditions Eichler, M.; Sayar, W.; Arcones, A. The Astrophysical Journal, Vol. 879, Issue 1 https://doi.org/10.3847/1538-4357/ab24cf	journal	July 2019
Finding the Remnants of the Milky Way's Last Neutron Star Mergers Wu, Meng-Ru; Banerjee, Projjwal; Metzger, Brian D. The Astrophysical Journal, Vol. 880, Issue 1 https://doi.org/10.3847/1538-4357/ab2593	journal	July 2019
Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors Holmbeck, Erika M.; Frebel, Anna; McLaughlin, G. C. The Astrophysical Journal, Vol. 881, Issue 1 https://doi.org/10.3847/1538-4357/ab2a01	journal	August 2019
The Lanthanide Fraction Distribution in Metal-poor Stars: A Test of Neutron Star Mergers as the Dominant r -process Site Ji, Alexander P.; Drout, Maria R.; Hansen, Terese T. The Astrophysical Journal, Vol. 882, Issue 1 https://doi.org/10.3847/1538-4357/ab3291	journal	August 2019
Gamma Rays from Kilonova: A Potential Probe of r -process Nucleosynthesis Korobkin, Oleg; Hungerford, Aimee M.; Fryer, Christopher L. The Astrophysical Journal, Vol. 889, Issue 2 https://doi.org/10.3847/1538-4357/ab64d8	journal	February 2020
GW170817$-$the first observed neutron star merger and its kilonova: implications for the astrophysical site of the r-process Siegel, Daniel M. arXiv https://doi.org/10.48550/arxiv.1901.09044	text	January 2019
Actinide-rich and Actinide-poor $r$-Process Enhanced Metal-Poor Stars do not Require Separate $r$-Process Progenitors Holmbeck, Erika M.; Frebel, Anna; McLaughlin, G. C. arXiv https://doi.org/10.48550/arxiv.1904.02139	text	January 2019
The lanthanide fraction distribution in metal-poor stars: a test of neutron star mergers as the dominant r-process site Ji, Alexander P.; Drout, Maria R.; Hansen, Terese T. arXiv https://doi.org/10.48550/arxiv.1905.01814	text	January 2019
Gamma-rays from kilonova: a potential probe of r-process nucleosynthesis Korobkin, Oleg; Hungerford, Aimee M.; Fryer, Christopher L. arXiv https://doi.org/10.48550/arxiv.1905.05089	text	January 2019

Similar Records

Contribution of neutron star mergers to the r-process chemical evolution in the hierarchical galaxy formation

Journal Article · Thu Oct 20 00:00:00 EDT 2016 · Astrophysical Journal · OSTI ID:22868589

MeV Gamma Rays from Fission: A Distinct Signature of Actinide Production in Neutron Star Mergers

Journal Article · Thu Oct 22 20:00:00 EDT 2020 · The Astrophysical Journal. Letters (Online) · OSTI ID:1736327

Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors

Journal Article · Mon Aug 05 20:00:00 EDT 2019 · The Astrophysical Journal (Online) · OSTI ID:1565905

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Population II
abundances
binaries
nuclear reactions
nucleosynthesis
stars

Actinide Production in the Neutron-rich Ejecta of a Neutron Star Merger

Citation Formats

References (106)

Cited By (13)

Similar Records

Related Subjects