done in a quite different way, so the jury is
still out.
galaxies over the past 10 billion years”, Monthly
Notices of the Royal Astronomical Society, 427:
550, 2012
The Next Steps: Hubble and the
GOGREEN Survey
Lidman, C., et al., ”The importance of major
mergers in the build up of stellar mass in brightest cluster galaxies at z = 1”, Monthly Notices of
the Royal Astronomical Society, 433: 825, 2013
Our team is taking steps to better understand the quenching process in distant clusters. We have recently been awarded time to
take H-alpha images of the GCLASS clusters
with the Hubble Space Telescope (HST). With
HST’s resolution we should be able to not
only resolve the star-forming disks in cluster
galaxies, but also see if they really have been
stripped by the intracluster gas.
Even more exciting is the recent start of the
GOGREEN (Gemini Observations of Galaxies in Rich Early ENvironments) survey. This
440 hour program is one of the new Gemini
Large and Long programs and will obtain
spectra for ~1000 cluster and group galaxies
at 1.0 < z < 1.5 using the recently-upgraded
Hamamatsu chips on both GMOS South
and soon on GMOS North. GOGREEN will
go much deeper than GCLASS and allow us
to access higher-redshift clusters, as well as
much lower-mass galaxies. This should allow
us to better understand how galaxies of different masses are affected by their environments, as well as whether the whole process
changes over cosmic time. GOGREEN observations are slated for completion in 2017,
and we look forward to summarizing those
results in a future GeminiFocus article.
References
Biviano, A.; Katgert, P.; Thomas, T.; Adami, C.,
”The ESO nearby Abell cluster survey”, Astronomy & Astrophysics, 387: 8, 2002
Haines, C., et al., ”LoCuSS: The steady decline
and slow quenching of star formation in cluster
galaxies over the last four billion years”, The Astrophysical Journal, 775: 126, 2013
Lidman, C., et al., ”Evidence for significant
growth in the stellar mass of brightest cluster
January 2015
Muzzin, A., et al., ”The phase space and stellar
populations of cluster galaxies at z ~ 1: simultaneous constraints on the location and timescale of satellite quenching”, The Astrophysical
Journal, 796: 65, 2014
Muzzin, A., et al., ”The Gemini CLuster Astrophysics Spectroscopic Survey (GCLASS): the
role of environment and self-regulation in galaxy evolution at z ~ 1“, The Astrophysical Journal,
746: 188, 2012
Noble, A., Webb, T., Muzzin, A., Wilson, G., Yee,
H., van der