X-ray Study of Ultraluminous X-ray Sources with XMM-Newton and NuSTAR
Abstract
We propose to continue the simultaneous XMM+NuSTAR observing program for ultraluminous X-ray sources (ULXs) initiated in the previous observing cycle, with observations of two further sources of interest, Holmberg II X-1 and NGC5907 ULX. The bright X-ray emission from ULX binaries greatly exceeds the Eddington luminosity for a spherically accreting stellar-mass compact object, and understanding why this is so is one of the biggest mysteries in high energy astrophysics. Combined, XMM-Newton and NuSTAR will obtain high-quality spectra and timing measurements from 0.3 30 keV, providing powerful probes for understanding the accretion modes and nature of the central BHs.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2012
- Bibcode:
- 2012xmm..prop..165H
- Keywords:
-
- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- Holmberg II X-1;
- NGC 5907 ULX;
- Holmberg II X-1;
- NGC 5907 ULX