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Please use this identifier to cite or link to this item: http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/18450
Title: Probing decaying dark matter using the post-eor hi 21-cm signal
Authors: Sarkar, Tapomoy Guha
Keywords: Physics
Power spectrum
Cosmology
Astrophysics
Issue Date: Dec-2024
Abstract: We propose the HI 21-cm power spectrum from the post-reionization epoch as a probe of a cosmological model with decaying dark matter particles. The unstable particles are assumed to undergo a 2-body decay into a massless and massive daughter. We assume, that a fraction f of the total dark matter budget to be, unstable and quantify the decay using the life-time Γ−1 and the relative mass splitting ϵ between the parent and the massive daughter. The redshift space anisotropic power spectrum of the post-reionization 21-cm signal brightness temperature, as a tracer of the dark matter clustering, imprints the decaying dark matter model through its effect on background evolution and the suppression of power on small this http URL find that with an idealized futuristic intensity mapping experiment with a SKA-I Mid like radio-array, ϵ and Γ can be measured at 3.1% and 4.64% around their fiducial values of ϵ=0.01 and Γ=0.074Gyr−1 respectively
URI: https://arxiv.org/abs/2412.10755
http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/18450
Appears in Collections:Department of Physics

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