Search academic texts

Information × Registration Number 0220U101089, 0118U005385 , R & D reports Title Determination of dark matter properties by using astrophysical and cosmological observations popup.stage_title Head Yakubovskyi Dmytro A., Registration Date 31-01-2020 Organization Bogolybov Institute for Theoretical Physics of NASU popup.description2  1. 3.5 keV line detected in the 35-60 deg region around GC with 2σ significance, its flux is in agreement with the results from central regions. A signal in the "blank-sky" regions is not significant. 2. The new sensitivity estimates for the Micro-X mission are obtained, which are much lower than previous ones. 3. Using cosmological simulations the expected 3.5 keV line width in the XRISM observation is estimated. 4. The model for dark matter density profile is built according to the RAR profile taking into account the results of the 3.5 keV line detection in the inner part of the halo. 5. Using the modified parametrisation of the galactic emission in the reionisation era and the last data on luminosity functions at z~6 we show that dark matter particles with mass <1.5 keV could be rejected with the 2σ significance. 6. Analysing NuSTAR observations of the Perseus cluster we obtain upper bounds on the photon-axion coupling constant, comparable with those obtained from grating data. 7. Accuracies of the machine learning methods for the binary classification of the galaxies from the SDSS survey were compared. Product Description popup.authors Dobrycheva Daria V. Rudakovskyi Anton V. Savchenko Denys O. Tsizh Maksym B. Yakubovskyi Dmytro A. popup.nrat_date 2020-04-02 Close