The Next Generation Virgo Cluster Survey. IX. Estimating the efficiency of galaxy formation on the lowest-mass scales

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DOIResolve DOI: http://doi.org/10.1088/0004-637X/807/1/88
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TypeArticle
Journal titleThe Astrophysical Journal
ISSN0004-637X
Volume807
Issue1
Article number88
AbstractThe Next Generation Virgo Cluster Survey has recently determined the luminosity function of galaxies in the core of the Virgo cluster down to unprecedented magnitude and surface brightness limits. Comparing simulations of cluster formation to the derived central stellar mass function, we attempt to estimate the stellar-to-halo-mass ratio (SHMR) for dwarf galaxies, as it would have been before they fell into the cluster. This approach ignores several details and complications, e.g., the contribution of ongoing star formation to the present-day stellar mass of cluster members, and the effects of adiabatic contraction and/or violent feedback on the subhalo and cluster potentials. The final results are startlingly simple, however; we find that the trends in the SHMR determined previously for bright galaxies appear to extend down in a scale-invariant way to the faintest objects detected in the survey. These results extend measurements of the formation efficiency of field galaxies by two decades in halo mass or five decades in stellar mass, down to some of the least massive dwarf galaxies known, with stellar masses of ∼105 M⊙.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Herzberg Institute of Astrophysics
Peer reviewedYes
NPARC number21277054
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Record identifier17a02434-5f1a-48c2-b781-37384d92a716
Record created2015-11-10
Record modified2016-07-18
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