Accreting pulsars in quiescence
Abstract
After more than 40 years of studies, surprisingly little is known on the emission of accreting pulsars at low-luminosity. It was suggested that already at 10^{35} ergs/s the onset of a centrifugal barrier should inhibit the accretion. On the other hand, pulsations during quiescence were reported for three transient pulsars, namely 1A 0535+262, 4U 1145-619, and 1A 1118-61. Accretion nature of the emission is suggested by short-term variability, energetics, hard X-ray spectrum and pulsations. It is unclear, however how the accretion proceeds in this case. Here, we propose to observe 1A 0535+262, 4U 1145-619, and 1A 1118-61 with XMM-Newton to study their spectral and timing properties to clarify the nature of pulsed emission at low luminosities.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2010
- Bibcode:
- 2010xmm..prop..177D
- Keywords:
-
- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- 1A 0535+26