HLX-1 may be an SS433 system.
Abstract
We show that the hyperluminous source HLX-1 may be a stellar-mass binary system like SS433, but seen along its X-ray beams. The precession of these beams gives the ∼1 yr characteristic time-scale of the light curve, while the significant X-ray duty cycle means that the precession angle must be comparable with the beam opening angle, which is of the order of 1.6°. The X-ray light curve appears to result from geometric collimation and scattering as the beam moves through the line of sight. Encouragingly, the distance ∼95 Mpc suggested for HLX-1 is only a few times larger than the minimum distance at which we can expect to view such a highly beamed system along its axis. This picture allows a simple interpretation of HLX-1 as the most extreme known member of the ultraluminous X-ray source population.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 2014
- DOI:
- 10.1093/mnrasl/slu105
- arXiv:
- arXiv:1407.0557
- Bibcode:
- 2014MNRAS.444L..30K
- Keywords:
-
- accretion;
- accretion discs;
- black hole physics;
- binaries: close;
- X-rays: binaries;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- accepted for publication in MNRAS