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: Lecture Hall, 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 is a staff in Max-Planck-Institute for Astrophysics in Germany, academician of the Russian Academy of Sciences, and deputy director of Space Research Institute in Russia. He focuses on high-energy astrophysics, made a number of widely-known contributions to the astrophysics of compact objects, the physics of accretion, X-ray scaling relations for star-forming galaxies, the nature of SN Ia progenitors, and fluctuations of the cosmic X-ray background. He is one of the creators of the X-ray all-sky map obtained by eROSITA in 2020.