Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole?
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...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Oxford University Press
2014
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/40063 |
| _version_ | 1848755764287504384 |
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| author | Cseh, D. Kaaret, P. Corbel, S. Grisé, F. Lang, C. Kording, E. Falcke, H. Jonker, P. Miller-Jones, James Farrell, S. Yang, Y. Paragi, Z. Frey, S. |
| author_facet | Cseh, D. Kaaret, P. Corbel, S. Grisé, F. Lang, C. Kording, E. Falcke, H. Jonker, P. Miller-Jones, James Farrell, S. Yang, Y. Paragi, Z. Frey, S. |
| author_sort | Cseh, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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 × 10^39 erg s-1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 10^39 erg s-1. 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. |
| first_indexed | 2025-11-14T09:01:29Z |
| format | Journal Article |
| id | curtin-20.500.11937-40063 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:01:29Z |
| publishDate | 2014 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-400632017-09-13T15:06:35Z Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? Cseh, D. Kaaret, P. Corbel, S. Grisé, F. Lang, C. Kording, E. Falcke, H. Jonker, P. Miller-Jones, James Farrell, S. Yang, Y. Paragi, Z. Frey, S. accretion black hole physics accretion discs X-rays: binaries 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 × 10^39 erg s-1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 10^39 erg s-1. 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. 2014 Journal Article http://hdl.handle.net/20.500.11937/40063 10.1093/mnrasl/slt166 Oxford University Press fulltext |
| spellingShingle | accretion black hole physics accretion discs X-rays: binaries Cseh, D. Kaaret, P. Corbel, S. Grisé, F. Lang, C. Kording, E. Falcke, H. Jonker, P. Miller-Jones, James Farrell, S. Yang, Y. Paragi, Z. Frey, S. Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? |
| title | Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? |
| title_full | Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? |
| title_fullStr | Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? |
| title_full_unstemmed | Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? |
| title_short | Unveiling recurrent jets of the ULX Holmberg II X-1: evidence for a massive stellar-mass black hole? |
| title_sort | unveiling recurrent jets of the ulx holmberg ii x-1: evidence for a massive stellar-mass black hole? |
| topic | accretion black hole physics accretion discs X-rays: binaries |
| url | http://hdl.handle.net/20.500.11937/40063 |