SIMBAD references

2013MNRAS.435.1904M - Mon. Not. R. Astron. Soc., 435, 1904-1927 (2013/November-1)

A tidal flare candidate in Abell 1795.


Abstract (from CDS):

As part of our ongoing archival X-ray survey of galaxy clusters for tidal flares, we present evidence of an X-ray transient source within 1 arcmin of the core of Abell 1795. The extreme variability (a factor of nearly 50), luminosity (>2x1042erg/s), long duration (>5 yr) and supersoft X-ray spectrum (<0.1keV) are characteristic signatures of a stellar tidal disruption event according to theoretical predictions and to existing X-ray observations, implying a massive ≳ 105M black hole at the centre of that galaxy. The large number of X-ray source counts ( ∼ 700) and long temporal baseline ( ∼ 12 yr with Chandra and XMM-Newton) make this one of the best sampled examples of any tidal flare candidate to date. The transient may be the same EUV source originally found contaminating the diffuse intracluster medium observations of Bowyer, Berghöfer and Korpela, which would make it the only tidal flare candidate with reported EUV observations and implies an early source luminosity 1-2 orders of magnitude greater. If the host galaxy is a cluster member then it must be a dwarf galaxy, an order of magnitude less massive than the quiescent galaxy Henize 2-10 which hosts a massive black hole that is difficult to reconcile with its low mass. The unusual faintness of the host galaxy may be explained by tidal stripping in the cluster core.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): galaxies: active - galaxies: clusters: individual: Abell 1795 - galaxies: nuclei - X-rays: bursts - X-rays: galaxies: clusters

CDS comments: p.1922: WINGS J1348850.51+263558.5 is a misprint for WINGS J134850.51+263558.5. WINGS J134849.64+264544.4 not found in the WINGS catalog.

Simbad objects: 30

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