Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes
We present a qualitative picture of prompt emission from tidal disruptions of white dwarfs (WD) by intermediate mass black holes (IMBH). The smaller size of an IMBH compared to a supermassive black hole and a smaller tidal radius of a WD disruption lead to a very fast event with high peak luminosity...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2012-12-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20123902007 |
| _version_ | 1818563423790694400 |
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| author | Laguna P. Bode T. Haas R. Reynolds C.S. Shcherbakov R.V. Pe’er A. |
| author_facet | Laguna P. Bode T. Haas R. Reynolds C.S. Shcherbakov R.V. Pe’er A. |
| author_sort | Laguna P. |
| collection | DOAJ |
| description | We present a qualitative picture of prompt emission from tidal disruptions of white dwarfs (WD) by intermediate mass black holes (IMBH). The smaller size of an IMBH compared to a supermassive black hole and a smaller tidal radius of a WD disruption lead to a very fast event with high peak luminosity. Magnetic field is generated in situ following the tidal disruption, which leads to effective accretion. Since large-scale magnetic field is also produced, geometrically thick super-Eddington inflow leads to a relativistic jet. The dense jet possesses a photosphere, which emits quasi-thermal radiation in soft X-rays. The source can be classified as a long low-luminosity gamma-ray burst (ll-GRB). Tidal compression of a WD causes nuclear ignition, which is observable as an accompanying supernova. We suggest that GRB060218 and SN2006aj is such a pair of ll-GRB and supernova. We argue that in a flux-limited sample the disruptions of WDs by IMBHs are more frequent then the disruptions of other stars by IMBHs. |
| first_indexed | 2024-12-14T01:16:22Z |
| format | Article |
| id | doaj.art-6c85b3536ab0485f8405565bc00fbe4e |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T01:16:22Z |
| publishDate | 2012-12-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-6c85b3536ab0485f8405565bc00fbe4e2022-12-21T23:22:34ZengEDP SciencesEPJ Web of Conferences2100-014X2012-12-01390200710.1051/epjconf/20123902007Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holesLaguna P.Bode T.Haas R.Reynolds C.S.Shcherbakov R.V.Pe’er A.We present a qualitative picture of prompt emission from tidal disruptions of white dwarfs (WD) by intermediate mass black holes (IMBH). The smaller size of an IMBH compared to a supermassive black hole and a smaller tidal radius of a WD disruption lead to a very fast event with high peak luminosity. Magnetic field is generated in situ following the tidal disruption, which leads to effective accretion. Since large-scale magnetic field is also produced, geometrically thick super-Eddington inflow leads to a relativistic jet. The dense jet possesses a photosphere, which emits quasi-thermal radiation in soft X-rays. The source can be classified as a long low-luminosity gamma-ray burst (ll-GRB). Tidal compression of a WD causes nuclear ignition, which is observable as an accompanying supernova. We suggest that GRB060218 and SN2006aj is such a pair of ll-GRB and supernova. We argue that in a flux-limited sample the disruptions of WDs by IMBHs are more frequent then the disruptions of other stars by IMBHs.http://dx.doi.org/10.1051/epjconf/20123902007 |
| spellingShingle | Laguna P. Bode T. Haas R. Reynolds C.S. Shcherbakov R.V. Pe’er A. Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes EPJ Web of Conferences |
| title | Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes |
| title_full | Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes |
| title_fullStr | Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes |
| title_full_unstemmed | Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes |
| title_short | Prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes |
| title_sort | prompt emission from tidal disruptions of white dwarfs by intermediate mass black holes |
| url | http://dx.doi.org/10.1051/epjconf/20123902007 |
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