Crust-cooling Models Are Insensitive to the Crust–Core Transition Pressure for Realistic Equations of State
Abstract
Neutron stars cooling after sustained accretion outbursts provide unique information about the neutron star crust and underlying dense matter. Comparisons between astronomical observations of these cooling transients and model calculations of neutron star crust cooling have frequently been used to constrain neutron star properties such as the mass, radius, crust composition, and presence of nuclear pasta. These calculations often use a fixed pressure at which the crust–core transition happens, though this quantity depends on the dense matter equation of state. We demonstrate that varying the crust–core transition pressure in a manner consistent with adopting various equations of state results in modest changes to the crust-cooling light curve. Finally, this validates the approach adopted in most crust-cooling studies to date, where the neutron star mass and radius are varied while leaving the crust–core transition pressure constant.
- Authors:
-
[1];
[1];
[2]
- Ohio Univ., Athens, OH (United States); Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States). Center for the Evolution of the Elements (JINA-CEE)
- Michigan State Univ., East Lansing, MI (United States); Joint Inst. for Nuclear Astrophysics (JINA), East Lansing, MI (United States). Center for the Evolution of the Elements (JINA-CEE)
- Publication Date:
- Research Org.:
- Ohio Univ., Athens, OH (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
- OSTI Identifier:
- 1593726
- Grant/Contract Number:
- SC0019042; FG02-93ER40756; FG02-88ER40387; AST-1812838; PHY-1430152
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 882; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; equation of state; stars: neutron; X-rays: binaries
Citation Formats
Lalit, Sudhanva, Meisel, Zach, and Brown, Edward F. Crust-cooling Models Are Insensitive to the Crust–Core Transition Pressure for Realistic Equations of State. United States: N. p., 2019.
Web. doi:10.3847/1538-4357/ab338c.
Lalit, Sudhanva, Meisel, Zach, & Brown, Edward F. Crust-cooling Models Are Insensitive to the Crust–Core Transition Pressure for Realistic Equations of State. United States. https://doi.org/10.3847/1538-4357/ab338c
Lalit, Sudhanva, Meisel, Zach, and Brown, Edward F. Thu .
"Crust-cooling Models Are Insensitive to the Crust–Core Transition Pressure for Realistic Equations of State". United States. https://doi.org/10.3847/1538-4357/ab338c. https://www.osti.gov/servlets/purl/1593726.
@article{osti_1593726,
title = {Crust-cooling Models Are Insensitive to the Crust–Core Transition Pressure for Realistic Equations of State},
author = {Lalit, Sudhanva and Meisel, Zach and Brown, Edward F.},
abstractNote = {Neutron stars cooling after sustained accretion outbursts provide unique information about the neutron star crust and underlying dense matter. Comparisons between astronomical observations of these cooling transients and model calculations of neutron star crust cooling have frequently been used to constrain neutron star properties such as the mass, radius, crust composition, and presence of nuclear pasta. These calculations often use a fixed pressure at which the crust–core transition happens, though this quantity depends on the dense matter equation of state. We demonstrate that varying the crust–core transition pressure in a manner consistent with adopting various equations of state results in modest changes to the crust-cooling light curve. Finally, this validates the approach adopted in most crust-cooling studies to date, where the neutron star mass and radius are varied while leaving the crust–core transition pressure constant.},
doi = {10.3847/1538-4357/ab338c},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 882,
place = {United States},
year = {2019},
month = {9}
}
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Continued cooling of the accretion-heated neutron star crust in the X-ray transient IGR J17480-2446 located in the globular cluster Terzan 5
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Domains and defects in nuclear "pasta"
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Nuclear Physics of the Outer Layers of Accreting Neutron Stars
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