2016A&A...592A..41M -
Astronomy and Astrophysics, volume 592A, 41-41 (2016/8-1)
XMMSL1J063045.9-603110: a tidal disruption event fallen into the back burner.
MAINETTI D., CAMPANA S. and COLPI M.
Abstract (from CDS):
Black holes at the centre of quiescent galaxies can be switched on when they accrete gas that is gained from stellar tidal disruptions. A star approaching a black hole on a low angular momentum orbit may be ripped apart by tidal forces, which triggers raining down of a fraction of stellar debris onto the compact object through an accretion disc and powers a bright flare. In this paper we discuss XMMSL1J063045.9-603110 as a candidate object for a tidal disruption event. The source has recently been detected to be bright in the soft X-rays during an XMM-Newton slew and later showed an X-ray flux decay by a factor of about 10 in twenty days. We analyse XMM-Newton and Swift data. XMMSL1J063045.9-603110 shows several features typical of tidal disruption events: the X-ray spectrum shows the characteristics of a spectrum arising from a thermal accretion disc, the flux decay follows a t–5/3 law, and the flux variation is >350. Optical observations testify that XMMSL1J063045.9-603110 is probably associated with an extremely small galaxy or even a globular cluster, which suggests that intermediate-mass black holes are located in the cores of (at least) some of them.
Abstract Copyright:
© ESO, 2016
Journal keyword(s):
accretion, accretion disks - X-rays: galaxies - galaxies: dwarf
Simbad objects:
5
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