Shanghai Astronomical Observatory Astrophysics Colloquium

Title: SRG/eROSITA all-sky survey: from stellar flares and neutrino sources to cosmology

Speaker: Prof. Dr. Marat Gilfanov (Max-Planck Institute for Astrophysics, Garching, Germany)

Time: 3:00 pm Nov. 6th (Thursday)

Location: Large conference room, 3rd floor

Tencent meeting：582-318-343

Abstract: After more than two years of scanning the sky during 2019-2022 the eROSITA X-ray telescope aboard SRG orbital observatory produced the best ever X-ray maps of the sky and discovered more than three million X-ray sources, of which about 20% are stars with active coronas in the Milky Way, and most of the rest are galaxies with active nuclei, quasars and clusters of galaxies. eROSITA detected over ~1000 sources that changed their luminosity by more than an order of magnitude, including about a hundred tidal disruption events. SRG/eROSITA samples of quasars and galaxy clusters will make it possible to study the large-scale structure of the Universe at z~1 and measure its cosmological parameters. I will review some of the SRG/eROSITA results in the Eastern Galactic hemisphere and future prospects.

CV:

Prof. Dr. Marat Gilfanov graduated from Moscow Institute of Physics and Technology, received his PhD in theoretical physics in 1989 from Space Research Institute (IKI) of Russian Academy of Sciences in Moscow and became a staff scientist at the High energy astrophysics department of IKI. In 1996 he obtained the degree of doctor of sciences which is in Russia equivalent, for example, to German habilitation. In 1996, he joined Max-Planck-Institute for Astrophysics, where he currently is a permanent scientific staff member and a research group leader. He also holds a position of a Chief Scientist at IKI. In 2014-2019 he was an extraordinary professor of Amsterdam University. 

Marat Gilfanov is an astrophysicist working in the interface of observational and theoretical astrophysics, focusing on a broad range of problems of high energy astrophysics, extragalactic astronomy and cosmology. He made a number of widely-known contributions to astrophysics of relativistic compact objects, physics of accretion and boundary layer, X-ray scaling relations for star-forming galaxies, nature of progenitors of SN Ia, fluctuations of the cosmic X-ray background. Presently, the main of focus of Marat’s research is SRG/eROSITA X-ray all-sky survey. Using its data he studies tidal disruption events, growth of supermassive black holes, large scale structure of the Universe and use of the all-sky survey data for cosmology. He is one of the creators of the X-ray all-sky map obtained by eROSITA in 2020. Marat Gilfanov holds a title of professor of astrophysics, he is a full member of the Russian Academy of sciences, member of Academia Europaea. He was a recipient of the COSPAR (Committee of Space Research) Yakov Zeldovich medal for young scientists, and the Russian Academy of Sciences A.A.Belopolsky Prize in astrophysics. 

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