SAX J1808.4-3657 in Quiescence: A Keystone for Neutron Star Science

Details SAX J1808.4-3657 in Quiescence: A Keystone for Neutron Star Science SAX J1808.4-3657 in Quiescence: A Keystone for Neutron Star Science

2007-10-08

arxiv.org/abs/0710.1552v1

AIPConf.Proc.983:526-529,2008

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of "Forty Years of Pulsars: Millisecond Pulsars, Magnetars and More" held in Montreal, Canada, Au

Scientific paper

10.1063/1.2900289

The accreting millisecond pulsar SAX J1808.4-3658 may be a transition object between accreting X-ray binaries and millisecond radio pulsars. We have constrained the thermal radiation from its surface through XMM-Newton X-ray observations, providing strong evidence for neutrino cooling processes from the neutron star core. We have also undertaken simultaneous X-ray and optical (Gemini) observations, shedding light on whether the strong heating of the companion star in quiescence may be due to X-ray irradiation, or to a radio pulsar turning on when accretion stops.

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