2021
DOI: 10.48550/arxiv.2111.02624
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Stellar Initial Mass Function (IMF) Probed with Supernova Rates and Neutrino Background: Cosmic Average IMF Slope is $\simeq 2-3$ Similar to the Salpeter IMF

Abstract: The stellar initial mass function (IMF) is expressed by φ(m) ∝ m −α with the slope α, and known as the poorly-constrained but very important function in studies of star and galaxy formation. There are no sensible observational constraints on the IMF slopes beyond Milky Way and nearby galaxies. Here we combine two sets of observational results, 1) cosmic densities of core-collapse supernova explosion (CCSNe) rates and 2) cosmic far ultraviolet radiation (and infrared re-radiation) densities, which are sensitive… Show more

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Cited by 2 publications
(1 citation statement)
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“…On the contrary, according to Horiuchi et al (2021), mergers of binary stars whose individual masses are originally below the core-collapse threshold can produce SN progenitors and enhance the SRN flux. In addition, the redshift evolution of the IMF could be taken into account for the estimation of the SRN event rate (Aoyama et al 2021).…”
Section: Formulation Of the Srn Fluxmentioning
confidence: 99%
“…On the contrary, according to Horiuchi et al (2021), mergers of binary stars whose individual masses are originally below the core-collapse threshold can produce SN progenitors and enhance the SRN flux. In addition, the redshift evolution of the IMF could be taken into account for the estimation of the SRN event rate (Aoyama et al 2021).…”
Section: Formulation Of the Srn Fluxmentioning
confidence: 99%