SIMBAD references

2015MNRAS.446.3268C - Mon. Not. R. Astron. Soc., 446, 3268-3276 (2015/February-1)

On the radio properties of the intermediate-mass black hole candidate ESO 243-49 HLX-1.

CSEH D., WEBB N.A., GODET O., BARRET D., CORBEL S., CORIAT M., FALCKE H., FARRELL S.A., KORDING E., LENC E. and WROBEL J.M.

Abstract (from CDS):

We present follow-up radio observations of ESO 243-49 HLX-1 from 2012 using the Australia Telescope Compact Array (ATCA) and the Karl G. Jansky Very Large Array (VLA). We report the detection of radio emission at the location of HLX-1 during its hard X-ray state using the ATCA. Assuming that the `Fundamental Plane' of accreting black holes is applicable, we provide an independent estimate of the black hole mass of M_BH≤2.8^+7.5_-2.1 ×10^6 M at 90 percent confidence. However, we argue that the detected radio emission is likely to be Doppler-boosted and our mass estimate is an upper limit. We discuss other possible origins of the radio emission such as being due to a radio nebula, star formation, or later interaction of the flares with the large-scale environment. None of these were found adequate. The VLA observations were carried out during the X-ray outburst. However, no new radio flare was detected, possibly due to a sparse time sampling. The deepest, combined VLA data suggest a variable radio source and we briefly discuss the properties of the previously detected flares and compare them with microquasars and active galactic nuclei.

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

Simbad objects: 13

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2020.09.18-14:44:09

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