Journal article
Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole?
Monthly notices of the Royal Astronomical Society. Letters, Vol.439(1), pp.L1-L5
09/2015
DOI: 10.1093/mnrasl/slt166
Abstract
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 ∼2 × 1039 erg s−1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 1039 erg s−1. Our results suggest that Holmberg II X-1 is powered by a black hole of M
BH ≥ 25 M, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.
Details
- Title: Subtitle
- Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole?
- Creators
- D Cseh - Radboud University NijmegenP Kaaret - University of IowaS Corbel - Paris Diderot UniversityF Grisé - Consejo Superior de Investigaciones CientíficasC Lang - University of IowaE Körding - Radboud University NijmegenH Falcke - Radboud University NijmegenP. G Jonker - SRON Netherlands Institute for Space ResearchJ. C. A Miller-Jones - Radboud University NijmegenS Farrell - University of SydneyY. J Yang - University of AmsterdamZ Paragi - Joint Institute for VLBI ERICS Frey
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society. Letters, Vol.439(1), pp.L1-L5
- Publisher
- Oxford University Press
- DOI
- 10.1093/mnrasl/slt166
- ISSN
- 1745-3925
- eISSN
- 1745-3933
- Language
- English
- Date published
- 09/2015
- Academic Unit
- Physics and Astronomy; Liberal Arts and Science Admin
- Record Identifier
- 9984199941202771
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