SIMBAD references

2014MNRAS.439L...1C - Mon. Not. R. Astron. Soc., 439, L1-L5 (2014/March-3)

Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole?

CSEH D., KAARET P., CORBEL S., GRISE F., LANG C., KORDING E., FALCKE H., JONKER P.G., MILLER-JONES J.C.A., FARRELL S., YANG Y.J., PARAGI Z. and FREY S.

Abstract (from CDS):

We report on the discovery of an apparent triple radio structure hidden inside the radio bubble of the ultraluminous X-ray source Holmberg II X-1. The morphology is consistent with a collimated jet structure, which is observed to emit optically thin synchrotron radiation. The central component has a steep radio spectrum and is brighter than the outer components indicating a renewed radio activity. We estimate a minimum time-averaged jet power of ∼ 2x1039 erg/s that is associated with a time-averaged isotropic X-ray luminosity of at least 4x1039 erg/s. Our results suggest that Holmberg II X-1 is powered by a black hole of MBH ≥ 25 M, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): accretion, accretion discs - black hole physics - X-rays: binaries

Status at CDS:  

Simbad objects: 8

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2020.05.27-18:42:27

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