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Positron annihilation spectrum from the Galactic Centre region observed by SPI/INTEGRAL, revisited: annihilation in a cooling ISM?
E. Churazov, S. Sazonov, S. Tsygankov +2
We analyse SPI/INTEGRAL data on the 511 keV line from the Galactic Centre, accumulated over ~6 years of observations. We decompose the X-ray and soft gamma-ray emission of the cent…
The collective X-ray luminosity of HMXB as a SFR indicator
Stefano Mineo, Marat Gilfanov, Rashid Sunyaev
We study the relation between the X-ray luminosity of compact sources and the SFR of the host galaxy. Our sample includes 38 galaxies for which a uniform set of X-ray, infra-red an…
Time of primordial Be-7 conversion into Li-7, energy release and doublet of narrow cosmological neutrino lines
Rishi Khatri, Rashid A. Sunyaev
One of the important light elements created during the big bang nucleosynthesis is Be-7 which then decays to Li-7 by electron capture when recombination becomes effective but well…
Resonant scattering of X-ray emission lines in the hot intergalactic medium
E. Churazov, I. Zhuravleva, S. Sazonov +1
While very often a hot intergalactic medium (IGM) is optically thin to continuum radiation, the optical depth in resonant lines can be of order unity or larger. Resonant scattering…
eROSITA on SRG
Peter Predehl, Hans Boehringer, Hermann Brunner +25
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the core instrument on the Russian Spektrum-Roentgen-Gamma (SRG) mission which is scheduled for launch in late…