Andrew Wetzel edited quiescent_fraction.tex  about 9 years ago

Commit id: 3cc101d17ea5790becff39b741bc9fde784de978

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Of the 56 satellites, only 4 (7\%) are star-forming/gas-rich: LMC and SMC of the MW, LGS 3 and IC 10 of M31.  Moreover, at $\mstar<8\times10^7\msun$, only 1 (LGS 3) of the 51 satellites is star-forming, and at $\mstar<9\times10^5\msun$ \emph{all} 40 satellites are quiescent.  These near-unity quiescent fractions for satellites of the MW/M31 contrast strongly with the effectively nearly  \emph{zero} quiescent fraction observed for isolated (non-satellite) galaxies at $\mstar<10^9\msun$ \citep[][see Introduction]{Geha2012, Phillips2014}. The only clear  known exception is exceptions are  KKR 25, a 25 ($\mstar=1.4\times10^6\msun$) and KKs ($\mstar=2.3\times10^7\msun$,  quiescent spheroidal with $\mstar=1.4\times10^6\msun$ galaxies  that is $1853\kpc$ are $\approx2\Mpc$  from M31. the MW/M31.