Abstract

Contributed Talk - Splinter eROSITA

Wednesday, 14 September 2022, 14:32   (SFG 0140 / virtual eROSITA)

Tidal Disruption Events detected by eROSITA

Zhu Liu1, A. Malyali1, I. Grotova1, A. Rau1, A. Merloni1, M. Krumpe2, D. Homan2, A. J. Goodwin3, A. Kawka3, G. E. Anderson3, J. C. A. Miller-Jones3, A. G. Markowitz4, 5, S. Ciroi6, F. Di Mille7, M. Schramm8, Shenli Tang9, D. A. H. Buckley10, 11, 12, M. Gromadzki13, Chichuan Jin14, 15, J. Buchner1
1 Max-Planck-Institut für extraterrestrische Physik, 2 Leibniz-Institut für Astrophysik Potsdam, 3 International Centre for Radio Astronomy Research, Curtin University, 4 Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, 5 University of California, San Diego, Center for Astrophysics and Space Sciences, 6 Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova, 7 Las Campanas Observatory, Carnegie Observatories, 8 Graduate school of Science and Engineering, Saitama Univ., 9 Department of Physics, University of Tokyo, 10 South African Astronomical Observatory, 11 Department of Astronomy, University of Cape Town, 12 Department of Physics, University of the Free State, 13 Astronomical Observatory, University of Warsaw, 14 National Astronomical Observatories, Chinese Academy of Sciences, 15 School of Astronomy and Space Sciences, University of Chinese Academy of Sciences

The energetic flares produced by stellar tidal disruption events (TDEs) provide a unique tool to probe the signatures of recently quiescent massive black holes. A rich variety of physical processes, such as the formation of a nascent accretion disk and the production of energetic outflows/jets, can also be operating over the course of these events, offering an ideal laboratory to study the accretion process over a broad range of accretion rates and outflow launching mechanisms. Launched in 2019, eROSITA has detected a large population of TDE candidates during the four all-sky surveys. In this talk, I will first provide an overview of our search for TDE candidates during the first two years of eROSITA's All-Sky Survey. I will then present a subsample of the most interesting TDE candidates, on which we have conducted extensive multi-wavelength follow-up observations, including those using the Australia Telescope Compact Array and the Australian National University 2.3m telescope and WiFeS spectrograph in collaboration with colleagues at Curtin University under the eROSITA_DE-AAL MoU. This subsample includes a repeating partial TDE, a radio luminous TDE, and the re-detection of a known X-ray TDE discovered by ROSAT. Lastly, I will conclude with a brief outlook for TDE science, and implications for future time-domain missions.