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Title: The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars

Abstract

Here, we report the discovery and monitoring of the near-infrared counterpart (AT2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo (GW170817) and as a short gamma-ray burst by Fermi Gamma-ray Burst Monitor (GBM) and Integral SPI-ACS (GRB 170817A). The evolution of the transient light is consistent with predictions for the behavior of a "kilonova/macronova" powered by the radioactive decay of massive neutron-rich nuclides created via r-process nucleosynthesis in the neutron-star ejecta. In particular, evidence for this scenario is found from broad features seen in Hubble Space Telescope infrared spectroscopy, similar to those predicted for lanthanide-dominated ejecta, and the much slower evolution in the near-infrared $${K}_{{\rm{s}}}$$-band compared to the optical. This indicates that the late-time light is dominated by high-opacity lanthanide-rich ejecta, suggesting nucleosynthesis to the third r-process peak (atomic masses $$A\approx 195$$). This discovery thus confirms that neutron-star mergers produce kilo-/macronovae and that they are at least a major—if not the dominant—site of rapid neutron capture nucleosynthesis in the universe.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [5];  [6]; ORCiD logo [7];  [8];  [9]; ORCiD logo [4];  [9]; ORCiD logo [7];  [1];  [2];  [4]; ORCiD logo [10];  [11]; ORCiD logo [8];  [12];  [13] more »;  [1]; ORCiD logo [4]; ORCiD logo [14];  [15];  [4]; ORCiD logo [16];  [7];  [2];  [17];  [10]; ORCiD logo [3];  [18];  [7]; ORCiD logo [10];  [2]; ORCiD logo [7]; ORCiD logo [3];  [8];  [1];  [1];  [19]; ORCiD logo [11]; ORCiD logo [19];  [20]; ORCiD logo [21];  [22];  [23];  [24];  [14];  [10];  [2]; ORCiD logo [7]; ORCiD logo [1];  [25] « less
  1. Univ. of Leicester (United Kingdom)
  2. Univ. of Warwick, Coventry (United Kingdom)
  3. Univ. of Cambridge (United Kingdom)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Univ. of Birmingham (United Kingdom)
  6. Stockholm Univ. (Sweden)
  7. Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
  8. National Inst. for Astrophysics (INAF), Merate (Italy)
  9. Space Telescope Science Inst., Baltimore, MD (United States)
  10. Astrophysical Inst. of Andalusia, Granada (Spain)
  11. Liverpool John Moores Univ. (United Kingdom)
  12. Space Science Data Center, Rome (Italy); National Inst. for Astrophysics (INAF), Cantone (Italy)
  13. Univ. of Copenhagen (Denmark). The Niels Bohr Inst.; Astrophysical Inst. of Andalusia, Granada (Spain)
  14. Cardiff Univ. (United Kingdom)
  15. Univ. of St. Andrews, Scotland (United Kingdom)
  16. Univ. of Copenhagen (Denmark). The Niels Bohr Inst.; Nagoya Univ. (Japan)
  17. Max Planck Inst. for Extraterrestrial Physics, Garching (Germany)
  18. Univ. of Iceland, Reykjavik (Iceland)
  19. National Inst. for Astrophysics (INAF), Bologna (Italy)
  20. National Inst. for Astrophysics (INAF), Catone (Italy)
  21. Pontifical Catholic Univ. of Chile, Santiago (Chile)
  22. Monash Univ., Melbourne, VIC (Australia)
  23. Univ. of Amsterdam (Netherlands); Netherlands Inst. for Radio Astronomy, Dwingeloo (Netherlands)
  24. Weizmann Inst. of Science, Rehovot (Israel)
  25. Univ. of Amsterdam (Netherlands)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1407907
Report Number(s):
LA-UR-17-29025
Journal ID: ISSN 2041-8213; TRN: US1702928
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Letters
Additional Journal Information:
Journal Volume: 848; Journal Issue: 2; Journal ID: ISSN 2041-8213
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; kilonova, neutron star, merger, r-process, nucleosynthesis, lanthanides

Citation Formats

Tanvir, N. R., Levan, A. J., González-Fernández, C., Korobkin, O., Mandel, I., Rosswog, S., Hjorth, J., D’Avanzo, P., Fruchter, A. S., Fryer, C. L., Kangas, T., Milvang-Jensen, B., Rosetti, S., Steeghs, D., Wollaeger, R. T., Cano, Z., Copperwheat, C. M., Covino, S., D’Elia, V., de Ugarte Postigo, A., Evans, P. A., Even, W. P., Fairhurst, S., Jaimes, R. Figuera, Fontes, C. J., Fujii, Y. I., Fynbo, J. P. U., Gompertz, B. P., Greiner, J., Hodosan, G., Irwin, M. J., Jakobsson, P., Jørgensen, U. G., Kann, D. A., Lyman, J. D., Malesani, D., McMahon, R. G., Melandri, A., O’Brien, P. T., Osborne, J. P., Palazzi, E., Perley, D. A., Pian, E., Piranomonte, S., Rabus, M., Rol, E., Rowlinson, A., Schulze, S., Sutton, P., Thöne, C. C., Ulaczyk, K., Watson, D., Wiersema, K., and Wijers, R. A. M. J. The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars. United States: N. p., 2017. Web. https://doi.org/10.3847/2041-8213/aa90b6.
Tanvir, N. R., Levan, A. J., González-Fernández, C., Korobkin, O., Mandel, I., Rosswog, S., Hjorth, J., D’Avanzo, P., Fruchter, A. S., Fryer, C. L., Kangas, T., Milvang-Jensen, B., Rosetti, S., Steeghs, D., Wollaeger, R. T., Cano, Z., Copperwheat, C. M., Covino, S., D’Elia, V., de Ugarte Postigo, A., Evans, P. A., Even, W. P., Fairhurst, S., Jaimes, R. Figuera, Fontes, C. J., Fujii, Y. I., Fynbo, J. P. U., Gompertz, B. P., Greiner, J., Hodosan, G., Irwin, M. J., Jakobsson, P., Jørgensen, U. G., Kann, D. A., Lyman, J. D., Malesani, D., McMahon, R. G., Melandri, A., O’Brien, P. T., Osborne, J. P., Palazzi, E., Perley, D. A., Pian, E., Piranomonte, S., Rabus, M., Rol, E., Rowlinson, A., Schulze, S., Sutton, P., Thöne, C. C., Ulaczyk, K., Watson, D., Wiersema, K., & Wijers, R. A. M. J. The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars. United States. https://doi.org/10.3847/2041-8213/aa90b6
Tanvir, N. R., Levan, A. J., González-Fernández, C., Korobkin, O., Mandel, I., Rosswog, S., Hjorth, J., D’Avanzo, P., Fruchter, A. S., Fryer, C. L., Kangas, T., Milvang-Jensen, B., Rosetti, S., Steeghs, D., Wollaeger, R. T., Cano, Z., Copperwheat, C. M., Covino, S., D’Elia, V., de Ugarte Postigo, A., Evans, P. A., Even, W. P., Fairhurst, S., Jaimes, R. Figuera, Fontes, C. J., Fujii, Y. I., Fynbo, J. P. U., Gompertz, B. P., Greiner, J., Hodosan, G., Irwin, M. J., Jakobsson, P., Jørgensen, U. G., Kann, D. A., Lyman, J. D., Malesani, D., McMahon, R. G., Melandri, A., O’Brien, P. T., Osborne, J. P., Palazzi, E., Perley, D. A., Pian, E., Piranomonte, S., Rabus, M., Rol, E., Rowlinson, A., Schulze, S., Sutton, P., Thöne, C. C., Ulaczyk, K., Watson, D., Wiersema, K., and Wijers, R. A. M. J. Mon . "The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars". United States. https://doi.org/10.3847/2041-8213/aa90b6. https://www.osti.gov/servlets/purl/1407907.
@article{osti_1407907,
title = {The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars},
author = {Tanvir, N. R. and Levan, A. J. and González-Fernández, C. and Korobkin, O. and Mandel, I. and Rosswog, S. and Hjorth, J. and D’Avanzo, P. and Fruchter, A. S. and Fryer, C. L. and Kangas, T. and Milvang-Jensen, B. and Rosetti, S. and Steeghs, D. and Wollaeger, R. T. and Cano, Z. and Copperwheat, C. M. and Covino, S. and D’Elia, V. and de Ugarte Postigo, A. and Evans, P. A. and Even, W. P. and Fairhurst, S. and Jaimes, R. Figuera and Fontes, C. J. and Fujii, Y. I. and Fynbo, J. P. U. and Gompertz, B. P. and Greiner, J. and Hodosan, G. and Irwin, M. J. and Jakobsson, P. and Jørgensen, U. G. and Kann, D. A. and Lyman, J. D. and Malesani, D. and McMahon, R. G. and Melandri, A. and O’Brien, P. T. and Osborne, J. P. and Palazzi, E. and Perley, D. A. and Pian, E. and Piranomonte, S. and Rabus, M. and Rol, E. and Rowlinson, A. and Schulze, S. and Sutton, P. and Thöne, C. C. and Ulaczyk, K. and Watson, D. and Wiersema, K. and Wijers, R. A. M. J.},
abstractNote = {Here, we report the discovery and monitoring of the near-infrared counterpart (AT2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo (GW170817) and as a short gamma-ray burst by Fermi Gamma-ray Burst Monitor (GBM) and Integral SPI-ACS (GRB 170817A). The evolution of the transient light is consistent with predictions for the behavior of a "kilonova/macronova" powered by the radioactive decay of massive neutron-rich nuclides created via r-process nucleosynthesis in the neutron-star ejecta. In particular, evidence for this scenario is found from broad features seen in Hubble Space Telescope infrared spectroscopy, similar to those predicted for lanthanide-dominated ejecta, and the much slower evolution in the near-infrared ${K}_{{\rm{s}}}$-band compared to the optical. This indicates that the late-time light is dominated by high-opacity lanthanide-rich ejecta, suggesting nucleosynthesis to the third r-process peak (atomic masses $A\approx 195$). This discovery thus confirms that neutron-star mergers produce kilo-/macronovae and that they are at least a major—if not the dominant—site of rapid neutron capture nucleosynthesis in the universe.},
doi = {10.3847/2041-8213/aa90b6},
journal = {The Astrophysical Journal. Letters},
number = 2,
volume = 848,
place = {United States},
year = {2017},
month = {10}
}

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    The Distance to NGC 4993: The Host Galaxy of the Gravitational-wave Event GW170817
    journal, October 2017

    • Hjorth, Jens; Levan, Andrew J.; Tanvir, Nial R.
    • The Astrophysical Journal, Vol. 848, Issue 2
    • DOI: 10.3847/2041-8213/aa9110

    Follow-up of the Neutron Star Bearing Gravitational-wave Candidate Events S190425z and S190426c with MMT and SOAR
    journal, July 2019

    • Hosseinzadeh, G.; Cowperthwaite, P. S.; Gomez, S.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/2041-8213/ab271c

    Follow Up of GW170817 and Its Electromagnetic Counterpart by Australian-Led Observing Programmes
    journal, January 2017

    • Andreoni, I.; Ackley, K.; Cooke, J.
    • Publications of the Astronomical Society of Australia, Vol. 34
    • DOI: 10.1017/pasa.2017.65

    The X-ray counterpart to the gravitational-wave event GW170817
    journal, October 2017


    Generating keV ion distributions for nuclear reactions at near solid-density using intense short-pulse lasers
    journal, September 2019


    The origin of polarization in kilonovae and the case of the gravitational-wave counterpart AT 2017gfo
    journal, November 2018


    Web application for galaxy-targeted follow-up of electromagnetic counterparts to gravitational wave sources
    journal, January 2020


    Spectral classification of gravitational-wave emission and equation of state constraints in binary neutron star mergers
    journal, September 2019

    • Bauswein, A.; Stergioulas, N.
    • Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 11
    • DOI: 10.1088/1361-6471/ab2b90

    A Strategy for LSST to Unveil a Population of Kilonovae without Gravitational-wave Triggers
    journal, May 2019

    • Andreoni, Igor; Anand, Shreya; Bianco, Federica B.
    • Publications of the Astronomical Society of the Pacific, Vol. 131, Issue 1000
    • DOI: 10.1088/1538-3873/ab1531

    Disc formation in the collapse of supramassive neutron stars
    journal, August 2018

    • Camelio, Giovanni; Dietrich, Tim; Rosswog, Stephan
    • Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 4
    • DOI: 10.1093/mnras/sty2181

    A lesson from GW170817: most neutron star mergers result in tightly collimated successful GRB jets
    journal, November 2018

    • Beniamini, Paz; Petropoulou, Maria; Barniol Duran, Rodolfo
    • Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 1
    • DOI: 10.1093/mnras/sty3093

    Transient survey rates for orphan afterglows from compact merger jets
    journal, February 2018

    • Lamb, Gavin P.; Tanaka, Masaomi; Kobayashi, Shiho
    • Monthly Notices of the Royal Astronomical Society, Vol. 476, Issue 4
    • DOI: 10.1093/mnras/sty484

    Detectability of neutron star merger afterglows
    journal, July 2019

    • Gottlieb, Ore; Nakar, Ehud; Piran, Tsvi
    • Monthly Notices of the Royal Astronomical Society, Vol. 488, Issue 2
    • DOI: 10.1093/mnras/stz1906

    An unusual transient following the short GRB 071227
    journal, July 2019

    • Eyles, R. A. J.; O’Brien, P. T.; Wiersema, K.
    • Monthly Notices of the Royal Astronomical Society, Vol. 489, Issue 1
    • DOI: 10.1093/mnras/stz2040

    possis: predicting spectra, light curves, and polarization for multidimensional models of supernovae and kilonovae
    journal, September 2019

    • Bulla, M.
    • Monthly Notices of the Royal Astronomical Society, Vol. 489, Issue 4
    • DOI: 10.1093/mnras/stz2495

    Neutron star binary orbits in their host potential: effect on early r-process enrichment
    journal, September 2019

    • Bonetti, Matteo; Perego, Albino; Dotti, Massimo
    • Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 1
    • DOI: 10.1093/mnras/stz2554

    A multidimensional implementation of the Advanced Spectral neutrino Leakage scheme
    journal, October 2019

    • Gizzi, D.; O’Connor, E.; Rosswog, S.
    • Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 3
    • DOI: 10.1093/mnras/stz2911

    Non-thermal afterglow of the binary neutron star merger GW170817: a more natural modelling of electron energy distribution leads to a qualitatively different new solution
    journal, February 2019

    • Lin, Haoxiang; Totani, Tomonori; Kiuchi, Kenta
    • Monthly Notices of the Royal Astronomical Society, Vol. 485, Issue 2
    • DOI: 10.1093/mnras/stz453

    A multiwavelength analysis of a collection of short-duration GRBs observed between 2012 and 2015
    journal, February 2019

    • Pandey, S. B.; Hu, Y.; Castro-Tirado, Ao J.
    • Monthly Notices of the Royal Astronomical Society, Vol. 485, Issue 4
    • DOI: 10.1093/mnras/stz530

    A new delay time distribution for merging neutron stars tested against Galactic and cosmic data
    journal, April 2019

    • Simonetti, Paolo; Matteucci, Francesca; Greggio, Laura
    • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 2
    • DOI: 10.1093/mnras/stz991

    A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient − GW170817
    journal, December 2017

    • Buckley, David A. H.; Andreoni, Igor; Barway, Sudhanshu
    • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 474, Issue 1
    • DOI: 10.1093/mnrasl/slx196

    Direct neutron capture cross section on Ge 80 and probing shape coexistence in neutron-rich nuclei
    journal, October 2019


    Improving the NRTidal model for binary neutron star systems
    journal, August 2019


    Inferring prompt black-hole formation in neutron star mergers from gravitational-wave data
    journal, February 2020


    The HabEx Ultraviolet Spectrograph (UVS): design and science drivers
    conference, September 2019

    • Scowen, Paul A.; Martin, Stefan; Mayer, Rud
    • UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX
    • DOI: 10.1117/12.2531658

    Background-limited Imaging in the Near Infrared with Warm InGaAs Sensors: Applications for Time-domain Astronomy
    journal, January 2019

    • Simcoe, Robert A.; Fűrész, Gábor; Sullivan, Peter W.
    • The Astronomical Journal, Vol. 157, Issue 2
    • DOI: 10.3847/1538-3881/aae094

    A Magnetar Origin for the Kilonova Ejecta in GW170817
    journal, March 2018

    • Metzger, Brian D.; Thompson, Todd A.; Quataert, Eliot
    • The Astrophysical Journal, Vol. 856, Issue 2
    • DOI: 10.3847/1538-4357/aab095

    Shock Acceleration of Electrons and Synchrotron Emission from the Dynamical Ejecta of Neutron Star Mergers
    journal, May 2018

    • Lee, Shiu-Hang; Maeda, Keiichi; Kawanaka, Norita
    • The Astrophysical Journal, Vol. 858, Issue 1
    • DOI: 10.3847/1538-4357/aabaea

    Three-dimensional GRMHD Simulations of Neutrino-cooled Accretion Disks from Neutron Star Mergers
    journal, May 2018


    A Long-lived Remnant Neutron Star after GW170817 Inferred from Its Associated Kilonova
    journal, July 2018


    On the Origin of Early Solar System Radioactivities: Problems with the Asymptotic Giant Branch and Massive Star Scenarios
    journal, August 2018


    Low-frequency View of GW170817/GRB 170817A with the Giant Metrewave Radio Telescope
    journal, October 2018

    • Resmi, L.; Schulze, S.; Ishwara-Chandra, C. H.
    • The Astrophysical Journal, Vol. 867, Issue 1
    • DOI: 10.3847/1538-4357/aae1a6

    From γ to Radio: The Electromagnetic Counterpart of GW170817
    journal, October 2018


    Neutron Star Mergers are the Dominant Source of the r -process in the Early Evolution of Dwarf Galaxies
    journal, December 2018

    • Duggan, Gina E.; Kirby, Evan N.; Andrievsky, Serge M.
    • The Astrophysical Journal, Vol. 869, Issue 1
    • DOI: 10.3847/1538-4357/aaeb8e

    Binary Neutron Star Mergers: Mass Ejection, Electromagnetic Counterparts, and Nucleosynthesis
    journal, December 2018

    • Radice, David; Perego, Albino; Hotokezaka, Kenta
    • The Astrophysical Journal, Vol. 869, Issue 2
    • DOI: 10.3847/1538-4357/aaf054

    Neutron Star Mergers Might Not Be the Only Source of r -process Elements in the Milky Way
    journal, April 2019

    • Côté, Benoit; Eichler, Marius; Arcones, Almudena
    • The Astrophysical Journal, Vol. 875, Issue 2
    • DOI: 10.3847/1538-4357/ab10db

    When Did the Remnant of GW170817 Collapse to a Black Hole?
    journal, May 2019

    • Gill, Ramandeep; Nathanail, Antonios; Rezzolla, Luciano
    • The Astrophysical Journal, Vol. 876, Issue 2
    • DOI: 10.3847/1538-4357/ab16da

    The Lanthanide Fraction Distribution in Metal-poor Stars: A Test of Neutron Star Mergers as the Dominant r -process Site
    journal, August 2019

    • Ji, Alexander P.; Drout, Maria R.; Hansen, Terese T.
    • The Astrophysical Journal, Vol. 882, Issue 1
    • DOI: 10.3847/1538-4357/ab3291

    Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova
    journal, September 2019


    Diversity of Kilonova Light Curves
    journal, February 2020

    • Kawaguchi, Kyohei; Shibata, Masaru; Tanaka, Masaomi
    • The Astrophysical Journal, Vol. 889, Issue 2
    • DOI: 10.3847/1538-4357/ab61f6

    ν bhlight : Radiation GRMHD for Neutrino-driven Accretion Flows
    journal, April 2019

    • Miller, Jonah M.; Ryan, Ben. R.; Dolence, Joshua C.
    • The Astrophysical Journal Supplement Series, Vol. 241, Issue 2
    • DOI: 10.3847/1538-4365/ab09fc

    AT 2017gfo: An Anisotropic and Three-component Kilonova Counterpart of GW170817
    journal, November 2017

    • Perego, Albino; Radice, David; Bernuzzi, Sebastiano
    • The Astrophysical Journal, Vol. 850, Issue 2
    • DOI: 10.3847/2041-8213/aa9ab9

    GRB 170817A Associated with GW170817: Multi-frequency Observations and Modeling of Prompt Gamma-Ray Emission
    journal, January 2018

    • Pozanenko, A. S.; Barkov, M. V.; Minaev, P. Yu.
    • The Astrophysical Journal, Vol. 852, Issue 2
    • DOI: 10.3847/2041-8213/aaa2f6

    How Special Is GRB 170817A?
    journal, January 2018


    The Binary Neutron Star Event LIGO/Virgo GW170817 160 Days after Merger: Synchrotron Emission across the Electromagnetic Spectrum
    journal, March 2018


    A Globular Cluster Luminosity Function Distance to NGC 4993 Hosting a Binary Neutron Star Merger GW170817/GRB 170817A
    journal, May 2018

    • Lee, Myung Gyoon; Kang, Jisu; Im, Myungshin
    • The Astrophysical Journal, Vol. 859, Issue 1
    • DOI: 10.3847/2041-8213/aac2e9

    GW170817 Most Likely Made a Black Hole
    journal, May 2018

    • Pooley, David; Kumar, Pawan; Wheeler, J. Craig
    • The Astrophysical Journal, Vol. 859, Issue 2
    • DOI: 10.3847/2041-8213/aac3d6

    An Upper Limit on the Linear Polarization Fraction of the GW170817 Radio Continuum
    journal, July 2018

    • Corsi, Alessandra; Hallinan, Gregg W.; Lazzati, Davide
    • The Astrophysical Journal, Vol. 861, Issue 1
    • DOI: 10.3847/2041-8213/aacdfd

    What Powered the Optical Transient AT2017gfo Associated with GW170817?
    journal, July 2018


    Observational Implications of Lowering the LIGO-Virgo Alert Threshold
    journal, July 2018

    • Lynch, Ryan; Coughlin, Michael; Vitale, Salvatore
    • The Astrophysical Journal, Vol. 861, Issue 2
    • DOI: 10.3847/2041-8213/aacf9f

    Spitzer Space Telescope Infrared Observations of the Binary Neutron Star Merger GW170817
    journal, July 2018

    • Villar, V. A.; Cowperthwaite, P. S.; Berger, E.
    • The Astrophysical Journal, Vol. 862, Issue 1
    • DOI: 10.3847/2041-8213/aad281

    Californium-254 and Kilonova Light Curves
    journal, August 2018


    A Strong Jet Signature in the Late-time Light Curve of GW170817
    journal, November 2018


    The Optical Afterglow of GW170817 at One Year Post-merger
    journal, January 2019


    GROWTH on S190510g: DECam Observation Planning and Follow-up of a Distant Binary Neutron Star Merger Candidate
    journal, August 2019

    • Andreoni, Igor; Goldstein, Daniel A.; Anand, Shreya
    • The Astrophysical Journal, Vol. 881, Issue 1
    • DOI: 10.3847/2041-8213/ab3399

    The Optical Afterglow of GW170817: An Off-axis Structured Jet and Deep Constraints on a Globular Cluster Origin
    journal, September 2019

    • Fong, W.; Blanchard, P. K.; Alexander, K. D.
    • The Astrophysical Journal, Vol. 883, Issue 1
    • DOI: 10.3847/2041-8213/ab3d9e

    The Reliability of the Low-latency Estimation of Binary Neutron Star Chirp Mass
    journal, October 2019

    • Biscoveanu, Sylvia; Vitale, Salvatore; Haster, Carl-Johan
    • The Astrophysical Journal, Vol. 884, Issue 2
    • DOI: 10.3847/2041-8213/ab479e

    SN2018kzr: A Rapidly Declining Transient from the Destruction of a White Dwarf
    journal, October 2019

    • McBrien, Owen R.; Smartt, Stephen J.; Chen, Ting-Wan
    • The Astrophysical Journal, Vol. 885, Issue 1
    • DOI: 10.3847/2041-8213/ab4dae

    Spiral-wave Wind for the Blue Kilonova
    journal, November 2019

    • Nedora, Vsevolod; Bernuzzi, Sebastiano; Radice, David
    • The Astrophysical Journal, Vol. 886, Issue 2
    • DOI: 10.3847/2041-8213/ab5794

    Upscattered Cocoon Emission in Short Gamma-Ray Bursts as High-energy Gamma-Ray Counterparts to Gravitational Waves
    journal, December 2019

    • Kimura, Shigeo S.; Murase, Kohta; Ioka, Kunihito
    • The Astrophysical Journal, Vol. 887, Issue 1
    • DOI: 10.3847/2041-8213/ab59e1