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Virial Halo Mass Function in the Planck Cosmology
- Source :
- Astrophysical Journal, 922(1):89. IOP Publishing Ltd.
- Publication Year :
- 2021
- Publisher :
- American Astronomical Society, 2021.
-
Abstract
- We study halo mass functions with high-resolution $N$-body simulations under a $��$CDM cosmology. Our simulations adopt the cosmological model that is consistent with recent measurements of the cosmic microwave backgrounds with the ${\it Planck}$ satellite. We calibrate the halo mass functions for $10^{8.5} \lower.5ex\hbox{$\; \buildrel < \over \sim \;$} M_\mathrm{vir} / (h^{-1}M_\odot) \lower.5ex\hbox{$\; \buildrel < \over \sim \;$} 10^{15.0 - 0.45 \, z}$, where $M_\mathrm{vir}$ is the virial spherical overdensity mass and redshift $z$ ranges from $0$ to $7$. The halo mass function in our simulations can be fitted by a four-parameter model over a wide range of halo masses and redshifts, while we require some redshift evolution of the fitting parameters. Our new fitting formula of the mass function has a 5\%-level precision except for the highest masses at $z\le 7$. Our model predicts that the analytic prediction in Sheth $\&$ Tormen would overestimate the halo abundance at $z=6$ with $M_\mathrm{vir} = 10^{8.5-10}\, h^{-1}M_\odot$ by $20-30\%$. Our calibrated halo mass function provides a baseline model to constrain warm dark matter (WDM) by high-$z$ galaxy number counts. We compare a cumulative luminosity function of galaxies at $z=6$ with the total halo abundance based on our model and a recently proposed WDM correction. We find that WDM with its mass lighter than $2.71\, \mathrm{keV}$ is incompatible with the observed galaxy number density at a $2��$ confidence level.<br />19 pages, 11 figures, 2 tables. Accepted for publication in ApJ
- Subjects :
- Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Halo mass function
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Astrophysics - Astrophysics of Galaxies
Virial theorem
Cosmology
High Energy Physics - Phenomenology
symbols.namesake
High Energy Physics - Phenomenology (hep-ph)
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
symbols
Planck
Astrophysics::Galaxy Astrophysics
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 922
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....0af77c647f17213d9f06e3ab52e3292f