A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1
The point-like X-ray source HLX-1, close to the S0 galaxy ESO 243-49, is one the strongest intermediate-mass black hole candidates, but the nature of its counterpart is still puzzling. By means of N-body/smoothed particle hydrodynamics simulations, we investigate the hypothesis that the HLX-1 counte...
| Main Authors: | , , , |
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| Format: | Journal Article |
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EDP Sciences
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/44661 |
| _version_ | 1848757065488531456 |
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| author | Mapelli, M. Annibali, F. Zampieri, L. Soria, Roberto |
| author_facet | Mapelli, M. Annibali, F. Zampieri, L. Soria, Roberto |
| author_sort | Mapelli, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The point-like X-ray source HLX-1, close to the S0 galaxy ESO 243-49, is one the strongest intermediate-mass black hole candidates, but the nature of its counterpart is still puzzling. By means of N-body/smoothed particle hydrodynamics simulations, we investigate the hypothesis that the HLX-1 counterpart is the nucleus of a bulgeless satellite galaxy, which undergoes a minor merger with the S0galaxy.We derived synthetic surface brightness profiles for the simulated counterpart of HLX-1 in six Hubble Space Telescope (HST) filters, ranging from far ultraviolet (FUV) to infrared wavelengths, and we compared them with the observed profiles. Our model matches the emission associated with the HLX-1 counterpart in all considered filters, including the bluer ones, even without requiring the contribution of an irradiated disc. The simulation can also account for an extended FUV emission, which is hinted at by the analysis of the F140LP HST filter. This matching is impossible to achieve by assuming either a bulgy satellite, a young star cluster, or an irradiated disc component. |
| first_indexed | 2025-11-14T09:22:10Z |
| format | Journal Article |
| id | curtin-20.500.11937-44661 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:22:10Z |
| publishDate | 2013 |
| publisher | EDP Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-446612017-09-13T14:15:05Z A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 Mapelli, M. Annibali, F. Zampieri, L. Soria, Roberto galaxies: interactions – methods: numerical – galaxies: individual: ESO 243-49 – X-rays: individuals: HLX-1 The point-like X-ray source HLX-1, close to the S0 galaxy ESO 243-49, is one the strongest intermediate-mass black hole candidates, but the nature of its counterpart is still puzzling. By means of N-body/smoothed particle hydrodynamics simulations, we investigate the hypothesis that the HLX-1 counterpart is the nucleus of a bulgeless satellite galaxy, which undergoes a minor merger with the S0galaxy.We derived synthetic surface brightness profiles for the simulated counterpart of HLX-1 in six Hubble Space Telescope (HST) filters, ranging from far ultraviolet (FUV) to infrared wavelengths, and we compared them with the observed profiles. Our model matches the emission associated with the HLX-1 counterpart in all considered filters, including the bluer ones, even without requiring the contribution of an irradiated disc. The simulation can also account for an extended FUV emission, which is hinted at by the analysis of the F140LP HST filter. This matching is impossible to achieve by assuming either a bulgy satellite, a young star cluster, or an irradiated disc component. 2013 Journal Article http://hdl.handle.net/20.500.11937/44661 10.1051/0004-6361/201322435 EDP Sciences fulltext |
| spellingShingle | galaxies: interactions – methods: numerical – galaxies: individual: ESO 243-49 – X-rays: individuals: HLX-1 Mapelli, M. Annibali, F. Zampieri, L. Soria, Roberto A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 |
| title | A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 |
| title_full | A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 |
| title_fullStr | A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 |
| title_full_unstemmed | A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 |
| title_short | A disrupted bulgeless satellite galaxy as counterpart of the ultraluminous X-ray source ESO 243-49 HLX-1 |
| title_sort | disrupted bulgeless satellite galaxy as counterpart of the ultraluminous x-ray source eso 243-49 hlx-1 |
| topic | galaxies: interactions – methods: numerical – galaxies: individual: ESO 243-49 – X-rays: individuals: HLX-1 |
| url | http://hdl.handle.net/20.500.11937/44661 |