Multiwavelength follow-up observations of the tidal disruption event candidate 2XMMi J184725.1-631724
dc.contributor.author | Lin, Dacheng | |
dc.contributor.author | Strader, Jay | |
dc.contributor.author | Carrasco, Eleazar R. | |
dc.contributor.author | Godet, Olivier | |
dc.contributor.author | Grupe, Dirk | |
dc.contributor.author | Webb, Natalie A. | |
dc.contributor.author | Barret, Didier | |
dc.contributor.author | Irwin, Jimmy A. | |
dc.contributor.other | University System Of New Hampshire | |
dc.contributor.other | University of New Hampshire | |
dc.contributor.other | Michigan State University | |
dc.contributor.other | Centre National de la Recherche Scientifique (CNRS) | |
dc.contributor.other | Universite de Toulouse | |
dc.contributor.other | Universite Toulouse III - Paul Sabatier | |
dc.contributor.other | Morehead State University | |
dc.contributor.other | University of Alabama Tuscaloosa | |
dc.contributor.other | Seoul National University (SNU) | |
dc.date.accessioned | 2018-12-05T21:07:13Z | |
dc.date.available | 2018-12-05T21:07:13Z | |
dc.date.issued | 2017-11-16 | |
dc.description.abstract | The ultrasoft X-ray flare 2XMMi J184725.1-631724 was serendipitously detected in two XMM-Newton observations in 2006 and 2007, with a peak luminosity of 6 x 10(43) erg s(-1). It was suggested to be a tidal disruption event (TDE) because its position is consistent with the centre of an inactive galaxy. It is the only known X-ray TDE candidate whose X-ray spectra showed evidence of a weak steep power-law component besides a dominant supersoft thermal disc. We have carried out multiwavelength follow-up observations of the event. Multiple X-ray monitorings show that the X-ray luminosity has decayed significantly after 2011. Especially, in our deep Chandra observation in 2013, we detected a very faint counterpart that supports the nuclear origin of 2XMMi J184725.1-631724 but had an X-ray flux a factor of similar to 1000 lower than in the peak of the event. Compared with follow-up ultraviolet (UV) observations, we found that there might be some enhanced UV emission associated with the TDE in the first XMM-Newton observation. We also obtained a high-quality UV-optical spectrum with the Southern Astrophysical Research (SOAR) Telescope and put a very tight constraint on the persistent nuclear activity, with a persistent X-ray luminosity expected to be lower than the peak of the flare by a factor of > 2700. Therefore, our multiwavelength follow-up observations strongly support the TDE explanation of the event. | en_US |
dc.format.mimetype | application/pdf | |
dc.identifier.citation | Lin, D., Strader, J., Carrasco, E., Godet, O., Grupe, D., Webb, N., Barret, D., Irwin, J. (2017): Multiwavelength Follow-up Observations of the Tidal Disruption Event Candidate 2XMMi J184725.1-631724. Monthly Notices of the Royal Astronomical Society, 474 (3). DOI: 10.1093/mnras/stx2940 | |
dc.identifier.doi | 10.1093/mnras/stx2940 | |
dc.identifier.orcid | https://orcid.org/0000-0001-5683-5339 | |
dc.identifier.orcid | https://orcid.org/0000-0002-7272-9234 | |
dc.identifier.orcid | https://orcid.org/0000-0002-0393-9190 | |
dc.identifier.uri | http://ir.ua.edu/handle/123456789/5147 | |
dc.language | English | |
dc.language.iso | en_US | |
dc.publisher | Oxford University Press | |
dc.subject | accretion, accretion discs | |
dc.subject | black hole physics | |
dc.subject | galaxies: individual: 2XMMi J184725.1-631724 | |
dc.subject | X-rays: galaxies | |
dc.subject | X-RAY SOURCES | |
dc.subject | SUPERMASSIVE BLACK-HOLES | |
dc.subject | PHOTON IMAGING CAMERA | |
dc.subject | STAR-FORMATION RATE | |
dc.subject | XMM-NEWTON | |
dc.subject | PARAMETER-ESTIMATION | |
dc.subject | CALIBRATION | |
dc.subject | CHANDRA | |
dc.subject | FLARE | |
dc.subject | LUMINOSITY | |
dc.subject | Astronomy & Astrophysics | |
dc.title | Multiwavelength follow-up observations of the tidal disruption event candidate 2XMMi J184725.1-631724 | en_US |
dc.type | text | |
dc.type | Article |
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