2014MNRAS.439L...1C

Query : 2014MNRAS.439L...1C

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

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [BWF97] IC 10 X-1 HXB 00 20 29.03310480 +59 16 51.7609560           ~ 180 0
2 CXOU J005510.0-374212 HXB 00 55 09.990 -37 42 12.16     22.44     WNE 139 1
3 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
4 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 213 2
5 4C 71.07 Bla 08 41 24.36528508 +70 53 42.1730435     17.30 16.8   ~ 818 1
6 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
7 SS 433 HXB 19 11 49.5647697480 +04 58 57.827127648   16.854 14.643     A7Ib 2253 4
8 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0

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