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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.
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Submitted on : Monday, April 25, 2022 - 10:41:00 AM
Last modification on : Monday, April 25, 2022 - 10:41:02 AM

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A. King, J. -P. Lasota. HLX-1 may be an SS433 system.. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2014, 444, pp.L30-L33. ⟨10.1093/mnrasl/slu105⟩. ⟨insu-03645269⟩

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