Impact of Pycnonuclear Fusion Uncertainties on the Cooling of Accreting Neutron Star Crusts

Jain, R.; Brown, E. F.; Schatz, H.; Afanasjev, A. V.; Beard, M.; Gasques, L. R.; Gupta, S. S.; Hitt, G. W.; Hix, W. R.; Lau, R.; Möller, P.; Ong, W. J.; Wiescher, M.; Xu, Y.

doi:10.3847/1538-4357/acebc4

Title: Impact of Pycnonuclear Fusion Uncertainties on the Cooling of Accreting Neutron Star Crusts

Journal Article · Fri Sep 15 00:00:00 EDT 2023 · The Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/acebc4· OSTI ID:2000774

;

; Afanasjev, A. V.; Beard, M.; Gasques, L. R.; Gupta, S. S.;

;

; Möller, P.; Ong, W. J.; Wiescher, M.; Xu, Y.

Abstract The observation of X-rays during quiescence from transiently accreting neutron stars provides unique clues about the nature of dense matter. This, however, requires extensive modeling of the crusts and matching the results to observations. The pycnonuclear fusion reaction rates implemented in these models are theoretically calculated by extending phenomenological expressions and have large uncertainties spanning many orders of magnitude. We present the first sensitivity studies of these pycnonuclear fusion reactions in realistic network calculations. We also couple the reaction network with the thermal evolution code dStar to further study their impact on the neutron star cooling curves in quiescence. Varying the pycnonuclear fusion reaction rates alters the depth at which nuclear heat is deposited although the total heating remains constant. The enhancement of the pycnonuclear fusion reaction rates leads to an overall shallower deposition of nuclear heat. The impurity factors are also altered depending on the type of ashes deposited on the crust. These total changes correspond to a variation of up to 9 eV in the modeled cooling curves. While this is not sufficient to explain the shallow heat source, it is comparable to the observational uncertainties and can still be important for modeling the neutron star crust.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)

Grant/Contract Number:: SC0013037; AC05-00OR22725; PHY-1430152; OISE-1927130; PHY-1913554; PHY-2209429; 80NSSC20K0503

OSTI ID:: 2000774

Alternate ID(s):: OSTI ID: 2203811

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Vol. 955 Journal Issue: 1; ISSN 0004-637X

Publisher:: American Astronomical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (55)

Static Solutions of Einstein's Field Equations for Spheres of Fluid Tolman, Richard C. Physical Review, Vol. 55, Issue 4 https://doi.org/10.1103/PhysRev.55.364	journal	February 1939
Strong neutrino cooling by cycles of electron capture and β− decay in neutron star crusts Schatz, H.; Gupta, S.; Möller, P. Nature, Vol. 505, Issue 7481 https://doi.org/10.1038/nature12757	journal	December 2013
The relativistic equations of stellar structure and evolution Thorne, K. S. The Astrophysical Journal, Vol. 212 https://doi.org/10.1086/155108	journal	March 1977
Accretion disk instabilities Mineshige, S. Astrophysics and Space Science, Vol. 210, Issue 1-2 https://doi.org/10.1007/BF00657876	journal	December 1993
Crust cooling of the neutron star in Aql X-1: different depth and magnitude of shallow heating during similar accretion outbursts Degenaar, N.; Ootes, L. S.; Page, D. Monthly Notices of the Royal Astronomical Society, Vol. 488, Issue 4 https://doi.org/10.1093/mnras/stz1963	journal	July 2019
Measurements of Fusion Reactions of Low-Intensity Radioactive Carbon Beams on ${}^{12}C$ and their Implications for the Understanding of X-Ray Bursts Carnelli, P. F. F.; Almaraz-Calderon, S.; Rehm, K. E. Physical Review Letters, Vol. 112, Issue 19 https://doi.org/10.1103/PhysRevLett.112.192701	journal	May 2014
A Change in the Quiescent X-Ray Spectrum of the Neutron star Low-Mass X-Ray Binary mxb 1659–29 Cackett, E. M.; Brown, E. F.; Cumming, A. The Astrophysical Journal, Vol. 774, Issue 2 https://doi.org/10.1088/0004-637x/774/2/131	journal	August 2013
Fusion reactions in multicomponent dense matter Yakovlev, D. G.; Gasques, L. R.; Afanasjev, A. V. Physical Review C, Vol. 74, Issue 3 https://doi.org/10.1103/PhysRevC.74.035803	journal	September 2006
POSSIBLE RESONANCES IN THE ¹² C + ¹² C FUSION RATE AND SUPERBURST IGNITION Cooper, Randall L.; Steiner, Andrew W.; Brown, Edward F. The Astrophysical Journal, Vol. 702, Issue 1 https://doi.org/10.1088/0004-637X/702/1/660	journal	August 2009
Thermal evolution and quiescent emission of transiently accreting neutron stars Potekhin, A. Y.; Chugunov, A. I.; Chabrier, G. Astronomy & Astrophysics, Vol. 629 https://doi.org/10.1051/0004-6361/201936003	journal	September 2019
Models for Type I X‐Ray Bursts with Improved Nuclear Physics Woosley, S. E.; Heger, A.; Cumming, A. The Astrophysical Journal Supplement Series, Vol. 151, Issue 1 https://doi.org/10.1086/381533	journal	March 2004
Nuclear physics of the outer layers of accreting neutron stars Meisel, Zach; Deibel, Alex; Keek, Laurens Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 9 https://doi.org/10.1088/1361-6471/aad171	journal	July 2018
Nuclear Reactions in the Crusts of Accreting Neutron Stars Lau, R.; Beard, M.; Gupta, S. S. The Astrophysical Journal, Vol. 859, Issue 1 https://doi.org/10.3847/1538-4357/aabfe0	journal	May 2018
Disordered Nuclear Pasta, Magnetic Field Decay, and Crust Cooling in Neutron Stars Horowitz, C. J.; Berry, D. K.; Briggs, C. M. Physical Review Letters, Vol. 114, Issue 3 https://doi.org/10.1103/PhysRevLett.114.031102	journal	January 2015
Models of crustal heating in accreting neutron stars Haensel, P.; Zdunik, J. L. Astronomy & Astrophysics, Vol. 480, Issue 2 https://doi.org/10.1051/0004-6361:20078578	journal	January 2008
The São Paulo Potential Chamon, L. C. Nuclear Physics A, Vol. 787, Issue 1-4 https://doi.org/10.1016/j.nuclphysa.2006.12.032	journal	May 2007
Late-time Cooling of Neutron Star Transients and the Physics of the Inner Crust Deibel, Alex; Cumming, Andrew; Brown, Edward F. The Astrophysical Journal, Vol. 839, Issue 2 https://doi.org/10.3847/1538-4357/aa6a19	journal	April 2017
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
Rapid Neutrino Cooling in the Neutron Star MXB 1659-29 Brown, Edward F.; Cumming, Andrew; Fattoyev, Farrukh J. Physical Review Letters, Vol. 120, Issue 18 https://doi.org/10.1103/PhysRevLett.120.182701	journal	April 2018
Continued Cooling of the Crust in the Neutron star Low-Mass X-Ray Binary ks 1731–260 Cackett, Edward M.; Brown, Edward F.; Cumming, Andrew The Astrophysical Journal, Vol. 722, Issue 2 https://doi.org/10.1088/2041-8205/722/2/l137	journal	September 2010
Heating in the Accreted Neutron Star Ocean: Implications for Superburst Ignition Gupta, Sanjib; Brown, Edward F.; Schatz, Hendrik The Astrophysical Journal, Vol. 662, Issue 2 https://doi.org/10.1086/517869	journal	June 2007
Consistent accretion-induced heating of the neutron-star crust in MXB 1659−29 during two different outbursts Parikh, A. S.; Wijnands, R.; Ootes, L. S. Astronomy & Astrophysics, Vol. 624 https://doi.org/10.1051/0004-6361/201834412	journal	April 2019
Forecasting Neutron Star Temperatures: Predictability and Variability Page, Dany; Reddy, Sanjay Physical Review Letters, Vol. 111, Issue 24 https://doi.org/10.1103/PhysRevLett.111.241102	journal	December 2013
Probing the Crust of the Neutron star in exo 0748-676 Degenaar, N.; Medin, Z.; Cumming, A. The Astrophysical Journal, Vol. 791, Issue 1 https://doi.org/10.1088/0004-637x/791/1/47	journal	July 2014
Thermodynamically Consistent Equation of State for an Accreted Neutron Star Crust Gusakov, M. E.; Chugunov, A. I. Physical Review Letters, Vol. 124, Issue 19 https://doi.org/10.1103/PhysRevLett.124.191101	journal	May 2020
Thermonuclear and pycnonuclear reactions Harrison, E. R. Proceedings of the Physical Society, Vol. 84, Issue 2 https://doi.org/10.1088/0370-1328/84/2/304	journal	August 1964
Toward a global description of the nucleus-nucleus interaction Chamon, L. C.; Carlson, B. V.; Gasques, L. R. Physical Review C, Vol. 66, Issue 1 https://doi.org/10.1103/physrevc.66.014610	journal	July 2002
The Variable Quiescent X-Ray Emission of the Transient Neutron star xte J1701–462 Fridriksson, Joel K.; Homan, Jeroen; Wijnands, Rudy The Astrophysical Journal, Vol. 736, Issue 2 https://doi.org/10.1088/0004-637x/736/2/162	journal	July 2011
Astrophysical S factors for fusion reactions involving C, O, Ne, and Mg isotopes Beard, M.; Afanasjev, A. V.; Chamon, L. C. Atomic Data and Nuclear Data Tables, Vol. 96, Issue 5 https://doi.org/10.1016/j.adt.2010.02.005	journal	September 2010
Superburst Models for Neutron Stars with Hydrogen- and Helium-Rich Atmospheres Keek, L.; Heger, A.; in 't Zand, J. J. M. The Astrophysical Journal, Vol. 752, Issue 2 https://doi.org/10.1088/0004-637X/752/2/150	journal	June 2012
Thermal conductivity and impurity scattering in the accreting neutron star crust Roggero, Alessandro; Reddy, Sanjay Physical Review C, Vol. 94, Issue 1 https://doi.org/10.1103/physrevc.94.015803	journal	July 2016
Neutron Reactions in Accreting Neutron Stars: A New Pathway to Efficient Crust Heating Gupta, Sanjib S.; Kawano, Toshihiko; Möller, Peter Physical Review Letters, Vol. 101, Issue 23 https://doi.org/10.1103/physrevlett.101.231101	journal	December 2008
Constraining the properties of neutron star crusts with the transient low-mass X-ray binary Aql X-1 Waterhouse, A. C.; Degenaar, N.; Wijnands, R. Monthly Notices of the Royal Astronomical Society, Vol. 456, Issue 4 https://doi.org/10.1093/mnras/stv2959	journal	January 2016
On Massive Neutron Cores Oppenheimer, J. R.; Volkoff, G. M. Physical Review, Vol. 55, Issue 4 https://doi.org/10.1103/PhysRev.55.374	journal	February 1939
Mapping Crustal Heating with the Cooling Light Curves of Quasi-Persistent Transients Brown, Edward F.; Cumming, Andrew The Astrophysical Journal, Vol. 698, Issue 2 https://doi.org/10.1088/0004-637X/698/2/1020	journal	May 2009
Fusion of neutron-rich oxygen isotopes in the crust of accreting neutron stars Horowitz, C. J.; Dussan, H.; Berry, D. K. Physical Review C, Vol. 77, Issue 4 https://doi.org/10.1103/PhysRevC.77.045807	journal	April 2008
Quiescent thermal emission from neutron stars in low-mass X-ray binaries Turlione, A.; Aguilera, D. N.; Pons, J. A. Astronomy & Astrophysics, Vol. 577 https://doi.org/10.1051/0004-6361/201322690	journal	April 2015
Deep crustal heating for realistic compositions of thermonuclear ashes Shchechilin, N. N.; Gusakov, M. E.; Chugunov, A. I. Monthly Notices of the Royal Astronomical Society, Vol. 507, Issue 3 https://doi.org/10.1093/mnras/stab2415	journal	August 2021
A “Hyperburst” in the MAXI J0556–332 Neutron Star: Evidence for a New Type of Thermonuclear Explosion Page, Dany; Homan, Jeroen; Nava-Callejas, Martin The Astrophysical Journal, Vol. 933, Issue 2 https://doi.org/10.3847/1538-4357/ac72a8	journal	July 2022
Crustal Emission and the Quiescent Spectrum of the Neutron Star in KS 1731−260 Rutledge, Robert E.; Bildsten, Lars; Brown, Edward F. The Astrophysical Journal, Vol. 580, Issue 1 https://doi.org/10.1086/342745	journal	November 2002
Experimental constraints on shallow heating in accreting neutron-star crusts Chamel, N.; Fantina, A. F.; Zdunik, J. L. Physical Review C, Vol. 102, Issue 1 https://doi.org/10.1103/PhysRevC.102.015804	journal	July 2020
Dependence of X-Ray Burst Models on Nuclear Reaction Rates Cyburt, R. H.; Amthor, A. M.; Heger, A. The Astrophysical Journal, Vol. 830, Issue 2 https://doi.org/10.3847/0004-637X/830/2/55	journal	October 2016
Neutron star cooling after deep crustal heating in the X-ray transient KS 1731-260 Shternin, P. S.; Yakovlev, D. G.; Haensel, P. Monthly Notices of the Royal Astronomical Society: Letters, Vol. 382, Issue 1 https://doi.org/10.1111/j.1745-3933.2007.00386.x	journal	November 2007
Nuclear Compositions in the Inner Crust of Neutron Stars Sato, K. Progress of Theoretical Physics, Vol. 62, Issue 4 https://doi.org/10.1143/PTP.62.957	journal	October 1979
São Paulo potential as a tool for calculating $S$ factors of fusion reactions in dense stellar matter Gasques, L. R.; Afanasjev, A. V.; Beard, M. Physical Review C, Vol. 76, Issue 4 https://doi.org/10.1103/physrevc.76.045802	journal	October 2007
A Strong Shallow heat Source in the Accreting Neutron star maxi J0556-332 Deibel, Alex; Cumming, Andrew; Brown, Edward F. The Astrophysical Journal, Vol. 809, Issue 2 https://doi.org/10.1088/2041-8205/809/2/L31	journal	August 2015
Microscopic sub-barrier fusion calculations for the neutron star crust Umar, A. S.; Oberacker, V. E.; Horowitz, C. J. Physical Review C, Vol. 85, Issue 5 https://doi.org/10.1103/physrevc.85.055801	journal	May 2012
Carbon Flashes in the Heavy-Element Ocean on Accreting Neutron Stars Cumming, Andrew; Bildsten, Lars The Astrophysical Journal, Vol. 559, Issue 2 https://doi.org/10.1086/323937	journal	October 2001
The Thermal State of ks 1731−260 After 14.5 Years in Quiescence Merritt, Rachael L.; Cackett, Edward M.; Brown, Edward F. The Astrophysical Journal, Vol. 833, Issue 2 https://doi.org/10.3847/1538-4357/833/2/186	journal	December 2016
Cooling of the quasi-persistent neutron star X-ray transients KS 1731-260 and MXB 1659-29 Cackett, E. M.; Wijnands, R.; Linares, M. Monthly Notices of the Royal Astronomical Society, Vol. 372, Issue 1 https://doi.org/10.1111/j.1365-2966.2006.10895.x	journal	October 2006
Neutron star crust cooling in the Terzan 5 X-ray transient Swift J174805.3–244637 Degenaar, N.; Wijnands, R.; Bahramian, A. Monthly Notices of the Royal Astronomical Society, Vol. 451, Issue 2 https://doi.org/10.1093/mnras/stv1054	journal	June 2015
Crust of accreting neutron stars within simplified reaction network Shchechilin, N. N.; Chugunov, A. I. Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 3 https://doi.org/10.1093/mnras/stz2838	journal	October 2019
Long-term temperature evolution of neutron stars undergoing episodic accretion outbursts Ootes, L. S.; Wijnands, R.; Page, D. Astronomy & Astrophysics, Vol. 630 https://doi.org/10.1051/0004-6361/201936035	journal	September 2019
Heat release in accreting neutron stars Gusakov, M. E.; Chugunov, A. I. Physical Review D, Vol. 103, Issue 10 https://doi.org/10.1103/PhysRevD.103.L101301	journal	May 2021
Crust structure and thermal evolution of neutron stars in soft X-ray transients Potekhin, A. Y.; Chabrier, G. Astronomy & Astrophysics, Vol. 645 https://doi.org/10.1051/0004-6361/202039006	journal	January 2021

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