Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. II. Emission from Hot Spots on a Rapidly Rotating Neutron Star
We describe the model of surface emission from a rapidly rotating neutron star that is applied to Neutron Star Interior Composition Explorer X-ray data of millisecond pulsars in order to statistically constrain the neutron star mass-radius relation and dense matter equation of state. To ensure that...
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| Veröffentlicht in: | Astrophysical journal. Letters 2019-12, Vol.887 (1), p.L26 |
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| creator | Bogdanov, Slavko Lamb, Frederick K. Mahmoodifar, Simin Miller, M. Coleman Morsink, Sharon M. Riley, Thomas E. Strohmayer, Tod E. Tung, Albert K. Watts, Anna L. Dittmann, Alexander J. Chakrabarty, Deepto Guillot, Sebastien Arzoumanian, Zaven Gendreau, Keith C. |
| description | We describe the model of surface emission from a rapidly rotating neutron star that is applied to Neutron Star Interior Composition Explorer X-ray data of millisecond pulsars in order to statistically constrain the neutron star mass-radius relation and dense matter equation of state. To ensure that the associated calculations are both accurate and precise, we conduct an extensive suite of verification tests between our numerical codes for both the Schwarzschild + Doppler and Oblate Schwarzschild approximations, and compare both approximations against exact numerical calculations. We find superb agreement between the code outputs, as well as in comparisons against a set of analytical and semi-analytical calculations, which, combined with their speed, demonstrates that the codes are well suited for large-scale statistical sampling applications. A set of verified, high-precision reference synthetic pulse profiles is provided to the community to facilitate testing of other independently developed codes. |
| doi_str_mv | 10.3847/2041-8213/ab5968 |
| format | Article |
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Coleman ; Morsink, Sharon M. ; Riley, Thomas E. ; Strohmayer, Tod E. ; Tung, Albert K. ; Watts, Anna L. ; Dittmann, Alexander J. ; Chakrabarty, Deepto ; Guillot, Sebastien ; Arzoumanian, Zaven ; Gendreau, Keith C.</creatorcontrib><description>We describe the model of surface emission from a rapidly rotating neutron star that is applied to Neutron Star Interior Composition Explorer X-ray data of millisecond pulsars in order to statistically constrain the neutron star mass-radius relation and dense matter equation of state. To ensure that the associated calculations are both accurate and precise, we conduct an extensive suite of verification tests between our numerical codes for both the Schwarzschild + Doppler and Oblate Schwarzschild approximations, and compare both approximations against exact numerical calculations. We find superb agreement between the code outputs, as well as in comparisons against a set of analytical and semi-analytical calculations, which, combined with their speed, demonstrates that the codes are well suited for large-scale statistical sampling applications. A set of verified, high-precision reference synthetic pulse profiles is provided to the community to facilitate testing of other independently developed codes.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/ab5968</identifier><language>eng</language><publisher>Austin: The American Astronomical Society</publisher><subject>Astrophysics ; Codes ; Emission ; Equations of state ; General relativity ; Gravitation ; High energy astrophysics ; Millisecond pulsars ; Neutron stars ; Neutrons ; Physics ; Pulsars ; Rotation powered pulsars ; Special relativity ; Statistical sampling ; Stellar rotation</subject><ispartof>Astrophysical journal. 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| ispartof | Astrophysical journal. Letters, 2019-12, Vol.887 (1), p.L26 |
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| subjects | Astrophysics Codes Emission Equations of state General relativity Gravitation High energy astrophysics Millisecond pulsars Neutron stars Neutrons Physics Pulsars Rotation powered pulsars Special relativity Statistical sampling Stellar rotation |
| title | Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. II. Emission from Hot Spots on a Rapidly Rotating Neutron Star |
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