|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'503'724
Articles rated: 2609
23 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
AT 2017gbl: a dust obscured TDE candidate in a luminous infrared galaxy | | E. C. Kool
; T. M. Reynolds
; S. Mattila
; E. Kankare
; M. A. Perez-Torres
; A. Efstathiou
; S. Ryder
; C. Romero-Canizales
; W. Lu
; T. Heikkila
; G. E. Anderson
; M. Berton
; J. Bright
; G. Cannizzaro
; D. Eappachen
; M. Fraser
; M. Gromadzki
; P. G. Jonker
; H. Kuncarayakti
; P. Lundqvist
; K. Maeda
; R. M. McDermid
; A. M. Medling
; S. Moran
; A. Reguitti
; M. Shahbandeh
; S. Tsygankov
; V. U
; T. Wevers
; | | Date: |
2 Jun 2020 | | Abstract: | We present the discovery with Keck of the extremely infrared (IR) luminous
transient AT 2017gbl, coincident with the Northern nucleus of the luminous
infrared galaxy (LIRG) IRAS 23436+5257. Our extensive multi-wavelength
follow-up spans ~900 days, including photometry and spectroscopy in the optical
and IR, and (very long baseline interferometry) radio and X-ray observations.
Radiative transfer modelling of the host galaxy spectral energy distribution
shows the presence of a hitherto undetected dust obscured active galactic
nucleus (AGN). The optical and near-IR spectra show broad 2000 km/s hydrogen,
He I and O I emission features that decrease in flux over time. Radio imaging
shows a fast evolving compact source of synchrotron emission spatially
coincident with AT 2017gbl. We infer a lower limit for the radiated energy of
7.3 x 10^50 erg from the IR photometry. An extremely energetic supernova would
satisfy this budget, but is ruled out by the radio counterpart evolution.
Instead, we propose AT 2017gbl is related to an accretion event by the central
supermassive black hole, where the spectral signatures originate in the AGN
broad line region and the IR photometry is consistent with re-radiation by
polar dust. Given the fast evolution of AT 2017gbl, we deem a tidal disruption
event (TDE) of a star a more plausible scenario than a dramatic change in the
AGN accretion rate. This makes AT 2017gbl the third TDE candidate to be hosted
by a LIRG, in contrast to the so far considered TDE population discovered at
optical wavelengths and hosted preferably by post-starburst galaxies. | | Source: | arXiv, 2006.1518 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER