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The hyperluminous X-ray source candidate in IC 4320: another HLX bites the dust

Sutton, Andrew D. and Roberts, Timothy P. and Gladstone, Jeanette C. and Walton, Dominic J. (2015) The hyperluminous X-ray source candidate in IC 4320: another HLX bites the dust. Monthly Notices of the Royal Astronomical Society, 450 (1). pp. 787-793. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20150710-133728608

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Abstract

The known members of the class of hyperluminous X-ray sources (HLXs) are few in number, yet they are of great interest as they are regarded as the likeliest intermediate-mass black hole (IMBH) candidates amongst the wider population of ultraluminous X-ray sources (ULXs). Here we report optical photometry and spectroscopy of an HLX candidate associated with the galaxy IC 4320, that reveal it is a background AGN. We discuss the implications of the exclusion of this object from the small number of well-studied HLXs, that appears to accentuate the difference in characteristics between the good IMBH candidate ESO 243-49 HLX-1 and the small handful of other HLXs.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1093/mnras/stv505DOIArticle
http://mnras.oxfordjournals.org/content/450/1/787PublisherArticle
http://arxiv.org/abs/1503.01711arXivDiscussion Paper
ORCID:
AuthorORCID
Roberts, Timothy P.0000-0001-8252-6337
Walton, Dominic J.0000-0001-5819-3552
Additional Information:© 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2015 March 4; received 2015 March 3; in original form 2014 October 27; first published online April 21, 2015. ADS and TPR acknowledge funding from the Science and Technology Facilities Council as part of the consolidated grants ST/K000861/1 and ST/L00075X/1. This work is based on observations made with ESO telescopes at the La Silla Paranal Observatory under programme IDs 090.D-0300(A) and 092.D-0212(A). It is also based in part on observations made by the Chandra X-ray Observatory, and made use of data supplied by the UK Swift Science Data Centre at the University of Leicester.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)ST/K000861/1
Science and Technology Facilities Council (STFC)ST/L00075X/1
Subject Keywords:accretion, accretion discs; black hole physics; X-rays: binaries; X-rays: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20150710-133728608
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150710-133728608
Official Citation:Sutton, A. D., Roberts, T. P., Gladstone, J. C., & Walton, D. J. (2015). The hyperluminous X-ray source candidate in IC 4320: another HLX bites the dust. Monthly Notices of the Royal Astronomical Society, 450(1), 787-793. doi: 10.1093/mnras/stv505
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58852
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:10 Jul 2015 21:48
Last Modified:09 Mar 2020 13:19

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