Correlation Analysis of Decaying Sterile Neutrino Dark Matter in the Context of the SRG Mission. (arXiv:2211.05919v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Barinov_V/0/1/0/all/0/1">V. V. Barinov</a>
We provide a correlation analysis of signatures associated with traces of the
dark matter decay and the galaxy spatial distribution according to the 2MRS
catalog of galaxies. Signature data analysis plays an important role in the
context of current and future observations and cosmological constraints.
Attention is paid to the constraints that can be obtained for decaying sterile
neutrinos when analyzing observations in the context of the
Spectr-Roentegn-Gamma (SRG) mission. We study the correlation spectra of dark
matter and galaxies, which can be obtained both for the eROSITA telescope and
for the first time for the ART-XC telescope. The analysis is carried out both
within the framework of the Limber approximation and within the framework of
the extended Limber approximation, which makes it possible to more accurately
study the power spectra in the region of small multipoles. We calculate the
power spectra in both approaches and examine the contribution of different
ranges of multipoles to the resulting constraints on sterile neutrino
parameters.
We provide a correlation analysis of signatures associated with traces of the
dark matter decay and the galaxy spatial distribution according to the 2MRS
catalog of galaxies. Signature data analysis plays an important role in the
context of current and future observations and cosmological constraints.
Attention is paid to the constraints that can be obtained for decaying sterile
neutrinos when analyzing observations in the context of the
Spectr-Roentegn-Gamma (SRG) mission. We study the correlation spectra of dark
matter and galaxies, which can be obtained both for the eROSITA telescope and
for the first time for the ART-XC telescope. The analysis is carried out both
within the framework of the Limber approximation and within the framework of
the extended Limber approximation, which makes it possible to more accurately
study the power spectra in the region of small multipoles. We calculate the
power spectra in both approaches and examine the contribution of different
ranges of multipoles to the resulting constraints on sterile neutrino
parameters.
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