SIMBAD references

2019MNRAS.487.5799R - Mon. Not. R. Astron. Soc., 487, 5799-5812 (2019/August-3)

Abundance matching with the mean star formation rate: there is no missing satellites problem in the Milky Way above M200 ∼ 109 M.

READ J.I. and ERKAL D.

Abstract (from CDS):

We introduce a novel abundance matching technique that produces a more accurate estimate of the pre-infall halo mass, M200, for satellite galaxies. To achieve this, we abundance match with the mean star formation rate, averaged over the time when a galaxy was forming stars, <SFR> , instead of the stellar mass, M*. Using data from the Sloan Digital Sky Survey, the GAMA survey and the Bolshoi simulation, we obtain a statistical <SFR> -M200 relation in Λ cold dark matter. We then compare the pre-infall halo mass, M^ abund^200, derived from this relation with the pre-infall dynamical mass, M^ dyn^200, for 21 nearby dSph and dIrr galaxies, finding a good agreement between the two. As a first application, we use our new <SFR> -M200 relation to empirically measure the cumulative mass function of a volume-complete sample of bright Milky Way satellites within 280 kpc of the Galactic centre. Comparing this with a suite of cosmological 'zoom' simulations of Milky Way-mass haloes that account for subhalo depletion by the Milky Way disc, we find no missing satellites problem above M200 ∼ 109 M in the Milky Way. We discuss how this empirical method can be applied to a larger sample of nearby spiral galaxies.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: abundances - galaxies: dwarf - galaxies: haloes - galaxies: kinematics and dynamics - cosmology: observations - dark matter

Simbad objects: 35

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2019MNRAS.487.5799R and select 'bookmark this link' or equivalent in the popup menu