Studying the Star Formation Histories of Galaxies in Clusters from Composite Spectra

We have formed "composite spectra" by combining the integrated-light spectra of individual galaxies in eight intermediate-redshift and 12 low-redshift clusters of galaxies. Because these composite spectra have much higher signal-to-noise ratios than individual galaxy spectra, they are part...

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Veröffentlicht in:	The Astrophysical journal 2004-12, Vol.617 (2), p.867-878
Hauptverfasser:	Dressler, Alan, Oemler, Jr., Augustus, Poggianti, Bianca M, Smail, Ian, Trager, Scott, Shectman, Stephen A, Couch, Warrick J, Ellis, Richard S
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Characteristics and properties of external galaxies and extragalactic objects Earth, ocean, space Exact sciences and technology Galaxy clusters Galaxy groups, clusters, and superclusters. Large-scale structure of the universe Origin, formation, evolution, age, and star formation Stellar systems. Galactic and extragalactic objects and systems. The universe
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