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

被引:45
作者
Cseh, D. [1 ]
Kaaret, P. [2 ]
Corbel, S. [3 ]
Grise, F. [4 ,5 ]
Lang, C. [2 ]
Kording, E. [1 ]
Falcke, H. [1 ]
Jonker, P. G. [1 ,6 ,7 ]
Miller-Jones, J. C. A. [8 ]
Farrell, S. [9 ]
Yang, Y. J. [10 ]
Paragi, Z. [11 ]
Frey, S. [12 ]
机构
[1] Radboud Univ Nijmegen, Dept Astrophys IMAPP, NL-6500 GL Nijmegen, Netherlands
[2] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52240 USA
[3] Lab AIM CEA IRFU CNRS INSU Univ Paris Diderot, CEA DSM IRFU SAp, F-91191 Gif Sur Yvette, France
[4] Inst Astrofis Canarias, E-38200 Tenerife, Spain
[5] Univ La Laguna, Dept Astrofis, E-38271 Tenerife, Spain
[6] SRON Netherlands Inst Space Res, SRON, NL-3584 CA Utrecht, Netherlands
[7] Harvard Smithonian Ctr Astrophys, Cambridge, MA 02138 USA
[8] Curtin Univ, Int Ctr Radio Astron Res, Perth, WA 6845, Australia
[9] Univ Sydney, Sydney Inst Astron, Sch Phys, Sydney, NSW 2006, Australia
[10] Univ Amsterdam, Astron Inst, NL-1090 GE Amsterdam, Netherlands
[11] Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands
[12] FOMI Satellite Geodet Observ, H-1592 Budapest, Hungary
基金
匈牙利科学研究基金会; 澳大利亚研究理事会;
关键词
accretion; accretion discs; black hole physics; X-rays: binaries; X-RAY SOURCE; ACTIVE GALACTIC NUCLEI; RADIO OBSERVATIONS; HIGH-LUMINOSITY; GRS 1915+105; XMM-NEWTON; GALAXY; POWER; KINEMATICS; NEBULA;
D O I
10.1093/mnrasl/slt166
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 similar to 2 x 10(39) erg s(-1) that is associated with a time-averaged isotropic X-ray luminosity of at least 4 x 10(39) erg s(-1). Our results suggest that Holmberg II X-1 is powered by a black hole of M-BH >= 25 M-circle dot, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.
引用
收藏
页码:L1 / L5
页数:5
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