Show simple item record

dc.contributor.authorMcNab, Karen 19:33:06 (GMT) 19:33:06 (GMT)
dc.description.abstractWe study the evolution of environmental quenching using a photometric selection of transition galaxies in GOGREEN- which encompasses clusters between 1<z<1.5 spanning a wide range in halo mass. We split the galaxies in GOGREEN into three populations using their NUV-V, V-J colours and define a green valley between the quiescent and star-forming populations, making use of the deep B, g, and V band imaging from the survey. The green valley makes up ~10% of the cluster population, and shows no strong dependence on cluster-centric radius, and also show a similar abundance to the field volume outside 1 Mpc. We find that the stellar mass function of the green valley is intermediate to the quiescent and star-forming SMFs, and that their shape more resembles the quiescent stellar mass function, specifically in the flat, faint-end slope. Using the stellar mass functions of each population, we build a simple framework where we determine the different parameters associated with the transitioning population. We assume that a fraction of the star-forming population quenches every Gyr, as a result of environment, and that they spend a time in the green valley as this happens. We find that the rate at which galaxies are entering the quiescent population as a result of environmental quenching is consistent with the past average rate at ~0.08/Gyr, and that the galaxies entering the green valley stay there for a time < 1 Gyr, which is expected from rapid environmental quenching mechanisms in clusters. We find an excess of spectroscopic post-starbursts and blue-quiescent galaxies in the cluster indicate that much of this transition is happening via fast-quenching. The environmental processes responsible for quenching the star-formation in cluster galaxies appears to already be underway, even at the early epochs considered here.en
dc.publisherUniversity of Waterlooen
dc.titleTransition Galaxies: The Evolution of Environmental Quenchingen
dc.typeMaster Thesisen
dc.pendingfalse and Astronomyen of Waterlooen
uws-etd.degreeMaster of Scienceen
uws.contributor.advisorBalogh, Michael
uws.contributor.affiliation1Faculty of Scienceen

Files in this item


This item appears in the following Collection(s)

Show simple item record


University of Waterloo Library
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
519 888 4883

All items in UWSpace are protected by copyright, with all rights reserved.

DSpace software

Service outages