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http://hdl.handle.net/20.500.12386/25184
Titolo: | XMMSL1J063045.9-603110: a tidal disruption event fallen into the back burner | Autori: | Mainetti, Deborah CAMPANA, Sergio Colpi, Monica |
Data pubblicazione: | 2016 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 592 | Da pagina:: | A41 | Abstract: | 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<SUP>-5/3</SUP> 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. | URI: | http://hdl.handle.net/20.500.12386/25184 | URL: | https://www.aanda.org/articles/aa/abs/2016/08/aa28737-16/aa28737-16.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201628737 | Bibcode ADS: | 2016A&A...592A..41M | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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