Consistent Modeling of GS 1826-24 X-Ray Bursts for Multiple Accretion Rates Demonstrates the Possibility of Constraining rp-process Reaction Rates

Meisel, Zach

doi:10.3847/1538-4357/aac3d3

Title: Consistent Modeling of GS 1826-24 X-Ray Bursts for Multiple Accretion Rates Demonstrates the Possibility of Constraining rp-process Reaction Rates

Journal Article · Thu Jun 21 00:00:00 EDT 2018 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/1538-4357/aac3d3· OSTI ID:1455420

Meisel, Zach ^[1]

Ohio Univ., Athens, OH (United States). Inst. of Nuclear & Particle Physics, Dept. of Physics & Astronomy

Type-I X-ray burst light curves encode unique information about the structure of accreting neutron stars and the nuclear reaction rates of the rp-process that powers bursts. Using the first model calculations of hydrogen/helium-burning bursts for a large range of astrophysical conditions performed with the code MESA, this work shows that simultaneous model–observation comparisons for bursts from several accretion rates $$\dot{M}$$ are required to remove degeneracies in astrophysical conditions that otherwise reproduce bursts for a single $$\dot{M}$$ and that such consistent multi-epoch modeling could possibly limit the ¹⁵O(α, γ)¹⁹Ne reaction rate. Comparisons to the 1998, 2000, and 2007 bursting epochs of the neutron star GS 1826-24 show that $$\dot{M}$$ must be larger than previously inferred and that the shallow heating in this source must be below 0.5 MeV/u, providing a new method to constrain the shallow heating mechanism in the outer layers of accreting neutron stars. Lastly, features of the light curve rise are used to demonstrate that a lower limit could likely be placed on the ¹⁵O(α, γ) reaction rate, demonstrating the possibility of constraining nuclear reaction rates with X-ray burst light curves.

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Research Organization:: Ohio Univ., Athens, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)

Contributing Organization:: Joint Institute for Nuclear Astrophysics

Grant/Contract Number:: FG02-88ER40387; PHY-1430152

OSTI ID:: 1455420

Journal Information:: The Astrophysical Journal (Online), Vol. 860, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 30 works

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Relativistic ocean r-modes during type-I X-ray bursts Chambers, F. R. N.; Watts, A. L. Monthly Notices of the Royal Astronomical Society, Vol. 491, Issue 4 https://doi.org/10.1093/mnras/stz3449	journal	December 2019
NICER Discovers mHz Oscillations in the “Clocked” Burster GS 1826−238 Strohmayer, T. E.; Gendreau, K. C.; Altamirano, D. The Astrophysical Journal, Vol. 865, Issue 1 https://doi.org/10.3847/1538-4357/aada14	journal	September 2018
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Nuclear Physics of the Outer Layers of Accreting Neutron Stars Meisel, Zach; Deibel, Alex; Keek, Laurens arXiv https://doi.org/10.48550/arxiv.1807.01150	text	January 2018
NICER Discovers mHz Oscillations in the "Clocked" Burster GS 1826-238 Strohmayer, Tod E.; Gendreau, Keith C.; Altamirano, Diego arXiv https://doi.org/10.48550/arxiv.1808.04294	text	January 2018
Spallation-altered accreted compositions for X-ray bursts: Impact on ignition conditions and burst ashes Randhawa, J. S.; Meisel, Z.; Giuliani, S. A. arXiv https://doi.org/10.48550/arxiv.1908.07614	text	January 2019
Relativistic ocean $r$-modes during type-I X-ray bursts Chambers, Frank R. N.; Watts, Anna L. arXiv https://doi.org/10.48550/arxiv.1912.05369	text	January 2019

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Consistent Modeling of GS 1826-24 X-Ray Bursts for Multiple Accretion Rates Demonstrates the Possibility of Constraining rp-process Reaction Rates Meisel, Zach https://doi.org/10.5281/zenodo.2598715 The current record documents this dataset	dataset	January 2019
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Consistent Modeling of GS 1826-24 X-Ray Bursts for Multiple Accretion Rates Demonstrates the Possibility of Constraining rp-process Reaction Rates Meisel, Zach https://doi.org/10.5281/zenodo.2598715 The current record is a supplement to this dataset	dataset	January 2019
Consistent Modeling of GS 1826-24 X-Ray Bursts for Multiple Accretion Rates Demonstrates the Possibility of Constraining rp-process Reaction Rates Meisel, Zach https://doi.org/10.5281/zenodo.2598716 The current record is a supplement to this dataset	dataset	January 2019