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26 April 2024 |
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Article overview
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The GEODE mass function and its astrophysical implication | | Kevin Croker
; Kurtis Nishimura
; Duncan Farrah
; | | Date: |
8 Apr 2019 | | Abstract: | We consider the observational consequences of replacing all black holes (BHs)
with a class of non-singular solutions that mimic BHs but with Dark Energy (DE)
interiors; GEneric Objects of Dark Energy (GEODEs). We focus on the BH mass
function and chirp-mass redshift distribution of mergers visible to
gravitational wave observatories. We incorporate the GEODE blueshift into an
initially Salpeter stellar remnant distribution, and model the binary
population by evolving synthesized binary remnant distributions, published
before LIGO’s first measurements. We find that a GEODE produced between $20 < z
< 40$, and observed at $z sim 7$, will have its initial mass amplified by
$18-134 imes$. This can relieve tension between accretion-only growth models
and the inferred masses of BHs in quasars at $z gtrsim 6$. Moreover, we find
that merger rates of GEODE binaries increase by a factor of
$sim$phantom{}$2 imes$ relative to classical BHs. The resulting GEODE mass
function is consistent with the most recent LIGO constraints at $< 0.5sigma$.
In contrast, a Salpeter stellar distribution that evolves into classical
remnants is in tension at $gtrsim 2sigma$. This agreement occurs without
low-metallicity regions, abnormally large progenitor stars, novel binary
formation channels, or primordial object formation at extreme rates. In
particular, we find that solar metallicity progenitors, which produce
$1.1-1.8mathrm{M}_odot$ remnants, overlap with many LIGO observations when
evolved as GEODEs. | | Source: | arXiv, 1904.3781 | | Services: | Forum | Review | PDF | Favorites | |
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