Running Hubble Tension and a H0 Diagnostic. (arXiv:2011.02858v3 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Krishnan_C/0/1/0/all/0/1">Chethan Krishnan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Colgain_E/0/1/0/all/0/1">Eoin Ó Colgáin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sheikh_Jabbari_M/0/1/0/all/0/1">M.M. Sheikh-Jabbari</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yang_T/0/1/0/all/0/1">Tao Yang</a>
Hubble tension is routinely presented as a mismatch between the Hubble
constant $H_0$ determined locally and a value inferred from the flat
$Lambda$CDM cosmology. In essence, the tension boils down to a disagreement
between two numbers. Here, assuming the tension is cosmological in origin, we
predict that within flat $Lambda$CDM there should be other inferred values of
$H_0$, and that a “running of $H_0$ with redshift” can be expected. These
additional determinations of $H_0$ may be traced to a difference between the
effective equation of state (EoS) of the Universe within the
Friedmann-Lema^itre-Robertson-Walker (FLRW) cosmology framework and the
current standard model. We introduce a diagnostic that flags such a running of
$H_0$.
Hubble tension is routinely presented as a mismatch between the Hubble
constant $H_0$ determined locally and a value inferred from the flat
$Lambda$CDM cosmology. In essence, the tension boils down to a disagreement
between two numbers. Here, assuming the tension is cosmological in origin, we
predict that within flat $Lambda$CDM there should be other inferred values of
$H_0$, and that a “running of $H_0$ with redshift” can be expected. These
additional determinations of $H_0$ may be traced to a difference between the
effective equation of state (EoS) of the Universe within the
Friedmann-Lema^itre-Robertson-Walker (FLRW) cosmology framework and the
current standard model. We introduce a diagnostic that flags such a running of
$H_0$.
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