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Late-time observations of the relativistic tidal disruption flare candidate Swift J1112.2-8238
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Brown, Gregory C., Levan, Andrew J., Stanway, Elizabeth R., Krühler, T., Tanvir, N. R., Davies, L. J. M., Fruchter, A. S., Cenko, S. B. and Metzger, B. D. (2017) Late-time observations of the relativistic tidal disruption flare candidate Swift J1112.2-8238. Monthly Notices of the Royal Astronomical Society, 472 (4). pp. 4469-4479. doi:10.1093/mnras/stx2193
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Official URL: http://dx.doi.org/10.1093/mnras/stx2193
Abstract
We present late-time follow-up of the relativistic tidal disruption flare candidate Swift J1112.2- 8238. We confirm the previously determined redshift of z = 0.8900±0.0005 based on multiple emission line detections. HST imaging of the host galaxy indicates a complex and distorted morphology with at least two spatially distinct components. These are offset in velocity space by less than 350 km s−1 in VLT/X-Shooter observations, suggesting that the host is undergoing interaction with another galaxy. The transient position is consistent to 2.2σ with the centre of a bulge-like component at a distance of 1.1±0.5kpc from its centre. Luminous, likely variable radio emission has also been observed, strengthening the similarities between Swift J1112.2-8238 and other previously identified relativistic tidal disruption flares. While the transient location is ∼2σ from the host centroid, the disrupted nature of the host may provide an explanation for this. The tidal disruption model remains a good description for these events.
| Item Type: | Journal Article | ||||||||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Black holes (Astronomy), Gamma rays, Stars--Masses | ||||||||||||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||||||||
| Publisher: | Oxford University Press | ||||||||||||||||||||||||
| ISSN: | 0035-8711 | ||||||||||||||||||||||||
| Official Date: | 28 August 2017 | ||||||||||||||||||||||||
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| Volume: | 472 | ||||||||||||||||||||||||
| Number: | 4 | ||||||||||||||||||||||||
| Page Range: | pp. 4469-4479 | ||||||||||||||||||||||||
| DOI: | 10.1093/mnras/stx2193 | ||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||
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