DETERMINATION OF DARK MATTER TYPE BY X-RAY SOURCES STATISTICS
Journal Title: Odessa Astronomical Publications - Year 2014, Vol 27, Issue 1
Abstract
The current cosmological model includes cold dark matter, which consists of massive nonrelativistic particles. There are also some observational and theoretical evidences for warm dark matter. The existence of warm DM can be examined by measuring of the galaxy clusters density profiles and accurate counting of dwarf galaxies. In this work I suppose that DM haloes are well traced by X-ray gas in clusters, groups, pairs and even single galaxies. The type of DM is inspected with the Xgal sample of 5021 X-ray emitting galaxies observed by XMM-Newton. The selection bias of this sample is also analyzed.
Authors and Affiliations
A. V. Tugay
Keywords
Related Articles
- EP ID EP598682
- DOI -
- Views 46
- Downloads 0
OBTAINING POSITIONS OF ASTEROIDS FROM DIGITIZED PROCESSING OF PHOTOGRAPHIC OBSERVATIONS IN BALDONE OBSERVATORY (CODE 069)
Digital processing of photographic plates of star fields allows to determine with high accuracy the coordinates and stellar magnitudes for all registered objects on these plates. The processing results can be used for a...
SCIENTIFIC ASTRONOMICAL SCHOOL BY PROFESSOR VOLODYMYR P. TSESEVICH ON THE PHYSICS OF VARIABLE STARS
I. B. Vavilova This paper is dedicated to the Prof. Volodymyr Platonovych Tsesevich (1907–1983), an outstanding scientist and legendary personality of the XX century. We describe briefly the Kyiv period of his life and...
PROGNOSES AND ANOMALY OF 24TH CYCLE OF SOLAR ACTIVITY
Development of solar activity in 24th cycle has specific peculiarity – non-monotonous increasing of solar activity on grown phase which occurs for 1/3 number of all cycles. The modification of Waldmayer’s method was app...
THE RESULTS OF OBSERVATIONS OF MUTUAL PHENOMENA OF THE GALILEAN SATELLITES OF JUPITER IN 2009 AND 2015 IN NIKOLAEV ASTRONOMICAL OBSERVATORY
The Earth and Jupiter once in 6 years have simultaneous passage of the ecliptic plane due to their orbital movement around the Sun. This makes it possible to observe the mutual occultations and eclipses in the Galilean s...
NEUTRINO IN GRAVITATIONAL FIELD
The spin-gravity coupling for highly relativistic fermions according to the classical Mathisson-Papapetrou and quantum Dirac equations is considered. It is stressed that the behavior of fermions in the highly relativisti...