2017 Fiscal Year Final Research Report
Elucidation of neutron star structure due to X-ray burst simulations
| Project/Area Number |
15K05083
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | compact stars |
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| Outline of Final Research Achievements |
MAXI J0556-332 is the hottest transient accreting neutron star at the beginning f its quiescence. A theoretical model with crustal heating indicates that additional shallow heat source of Qshallow > 6MeV per accreted nucleon is required in the shallow outer crust with respect to the deeper star crust by considering the observed decline in accretion rate at the end of outburst. However, the physical source of this shallow heating is still unclear. In the present investigation, we performed stellar evolutionary calculations, dopting the effects of outburst behavior of the accretion rate. As a consequence, we find that the quiescent light curve of MAXI J0556-332 can be well explained by the nuclear energy generation due to the hot CNO cycle.
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| Free Research Field |
nuclear astrophysics
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