Does Holmberg II X-1 harbor an intermediate-mass black hole?
Abstract
The nature of ULXs remains unclear. The emission of some of these ULXs is shown to be isotropic (not strongly beamed), meaning that either they accrete above the Eddington limit or they harbor intermediate-mass BHs. In the latter case, they are probably accreting in the ULX equivalent of the low-hard state and as such they should fall on the Fundamental Plane of BH activity. We propose to test using a simultaneous Chandra and VLA-A configuration observation if Holmberg II X-1 falls on this Fundamental Plane. If so, it would establish the ULX as a strong IMBH candidate.
- Publication:
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Chandra Proposal
- Pub Date:
- September 2013
- Bibcode:
- 2013cxo..prop.3784J