Quiescent light curve of accreting neutron star MAXI J0556-332

Helei Liu, Yasuhide Matsuo, Masa aki Hashimoto, Tsuneo Noda, Masayuki Y. Fujimoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

MAXI J0556-332 is the hottest transient accreting neutron star at the beginning of its quiescence. A theoretical model with crustal heating indicates that an additional shallow heat source of Qshallow > 6 MeV 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, adopting 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.

Original languageEnglish
Article number123901
Journaljournal of the physical society of japan
Volume86
Issue number12
DOIs
Publication statusPublished - Dec 15 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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