Stellar tidal disruption candidates found by cross-correlating the ROSAT Bright Source Catalogue and XMM-Newton observations

作者：Khabibullin I^*; Sazonov S

来源：Monthly Notices of the Royal Astronomical Society, 2014, 444(2): 1041-1053.

DOI：10.1093/mnras/stu1491

• accretion, accretion discs
• black hole physics
• methods: observational
• galaxies: nuclei

We performed a systematic search for stellar tidal disruption events (TDE) by looking for X-ray sources that were detected during the ROSAT All Sky Survey and faded by more than an order of magnitude over the next two decades according to XMM-Newton serendipitous observations. Besides a number of highly variable persistent X-ray sources (like active galactic nuclei and cataclysmic variables), we found three sources that are broadly consistent with the TDE scenario: 1RXS J114727.1+494302, 1RXS J130547.2+641252, and 1RXS J235424.5-102053. A TDE association is also acceptable for the fourth source, 1RXS J112312.7+ 012858, but an AGN origin cannot be ruled out either. This statistics implies a TDE rate of similar to 3 x 10 (5) yr (1) per galaxy in the Universe within z similar to 0.18, which is broadly consistent with the estimates of the TDE rate in the more local Universe obtained previously.

• 出版日期2014-10-21