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Andrew Wetzel edited quenching_time.tex
about 9 years ago
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Our results suggest that the typical timescale for satellites in the MW/M31 halos increases with satellite $\mstar$, from $\lesssim1\gyr$ at $\mstar<10^7\msun$ to $\sim5\gyr$ at $\mstar\approx10^{8.5}\msun$.
The results of \citet{Wheeler2014} indicate a continuation of this trend, though with a rapid increase ($\sim2\times$) of the timescale to $\approx9.5\gyr$, though interestingly they find no change from $\mstar\approx10^{8.5}$ to $10^{9.5}\msun$.
This rapid increase suggests some tension with our results, specifically, two satellites of M31, NGC 205 and M32 ($\mstar\approx10^{8.5}\msun$), which are quiescent, unless both satellites experienced unusually early infall, or M31 is particularly efficient at quenching its satellites, even compared with more massive hosts.
(\citealt{Wheeler2014}'s (\citeauthor{Wheeler2014}'s results are consistent with the star-forming LMC/SMC of the MW.)
Finally, the results of \citet{Wetzel2013} indicates that the quenching timescale rapidly \emph{decreases} by $\mstar=5\times10^9\msun$ and continues to decline with increasing $\mstar$.
Thus, the environmental quenching timescales are shortest for the lowest-mass satellites, and the timescale is longer for satellites near Magellanic-Cloud masses.