Program: GS-2005A-Q-27
Title: | Galaxy Evolution During Half the Age of the Universe |
PI: | Inger Jorgensen |
Co-I(s): | Roger Davies, Marcel Bergmann, David Crampton, Jordi Barr, Marianne Takamiya, Kristin Chiboucas, Maela Collobert |
Abstract
Detailed studies of nearby galaxies (z<0.05) have shown that galaxies have
very complex histories of formation and evolution involving mergers, bursts
of star formation, and morphological changes. Even so, the global properties
of the galaxies (radii, luminosities, rotation velocities, velocity dispersions,
and absorption line strengths) follow a number of very tight (empirical)
scaling relations, e.g. the Tully-Fisher relation and the Fundamental
Plane. These relations place constraints on models for galaxy evolution.
We are carrying out a large project aimed at
studying the galaxy evolution over the last half of the age of the Universe,
using similar techniques as those used for z~0 galaxies.
The project is based on spectroscopy and photometry of galaxies in 15 rich
clusters of galaxies with redshifts between 0.15 and 1.0.
The present proposal covers the last GMOS spectroscopic and photometric
observations for the project: RXJ1347.5-1145 at z=0.45 and RXJ1415.1+3612 at z=1.01.
This is a joint proposal (Gemini staff, UK, US, Canada) that uses both
GMOS-N and GMOS-S. Observations of RXJ1347.5-1145 will probe the effects
of cluster merging, while observations of RXJ1415.1+3612 are important for
firmly establishing our challenge to the passive evolution model.
Publications using this program's data
-
[data]
[ADS] The Gemini/HST Galaxy Cluster Project: Redshift 0.2–1.0 Cluster Sample, X-Ray Data, and Optical Photometry Catalog
-
[data]
[ADS] Galaxy Populations in Massive z = 0.2-0.9 Clusters. I. Analysis of Spectroscopy