NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-15 T00:55:28 PST
Help | Comment | NED Home

For refcode 2005ApJ...630..206F:
Retrieve 267 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2005ApJ...630..206F H{alpha}-derived Star Formation Rates for Three z=~0.75 EDisCS Galaxy Clusters Rose A. Finn, Dennis Zaritsky, Donald W. McCarthy, Jr., Bianca Poggianti, Gregory Rudnick, Claire Halliday, Bo Milvang-Jensen, Roser Pello, and Luc Simard Abstract. We present H{alpha}-derived SFRs for three z=~0.75 galaxy clusters. Our 1 {sigma} flux limit corresponds to a star formation rate (SFR) of 0.10 -- 0.24 h^-2^_100_ M_sun_ yr^-1^, and our minimum reliable H{alpha}+[NII] rest-frame equivalent width is 10 A. We show that H{alpha} narrowband imaging is an efficient method for measuring star formation in distant clusters. In two out of three clusters, we find that the fraction of star-forming galaxies increases with projected distance from the cluster center. We also find that the fraction of star-forming galaxies decreases with increasing local galaxy surface density in the same two clusters. We compare the median rate of star formation among star-forming cluster galaxies to a small sample of star-forming field galaxies from the literature and find that the median cluster SFRs are ~50% less than the median field SFR. We characterize cluster evolution in terms of the mass-normalized integrated cluster SFR and find that the z=~0.75 clusters have more SFR per cluster mass on average than the z<=0.4 clusters from the literature. The interpretation of this result is complicated by the dependence of the mass-normalized SFR on cluster mass and the lack of sufficient overlap in the mass ranges covered by the low- and high-redshift samples. We find that the fraction and luminosities of the brightest starburst galaxies at z=~0.75 are consistent with their being progenitors of the poststarburst galaxies at z=~0.45 if the poststarburst phase lasts several (~5) times longer than the starburst phase. Keywords: Galaxies: Clusters: General, Galaxies: Evolution, Galaxies: High-Redshift, Stars: Formation
Retrieve 267 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home