Quiescent Light Curve of Accreting Neutron Star MAXI J0556-332
arXiv:1703.01734 · doi:10.7566/JPSJ.86.123901
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.
9 pages, 2 figures
References in corpus (8)
- Neutron Star Observations: Prognosis for Equation of State Constraints
- Models of crustal heating in accreting neutron stars
- Strong neutrino cooling by cycles of electron capture and decay in neutron star crusts
- A strong shallow heat source in the accreting neutron star MAXI J0556-332
- Statistical theory of thermal evolution of neutron stars
- A strongly heated neutron star in the transient Z source MAXI J0556-332
- R-modes and neutron star recycling scenario
- Thermal structures of accreting neutron stars with neutrino losses due to strong pion condensations