1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Mass and RedshiftDependence of StarFormation in RelaxedGalaxy Clusters Rose FinnMichael L. BaloghDennis Zaritsky2008 год

Mass and Redshift Dependence of Star Formation in Relaxed Galaxy Clusters
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: We investigate the star-formation properties of dynamically relaxed galaxy clusters as a function of cluster mass for 308 low-redshift clusters drawn from the Sloan Digital Sky Survey (SDSS) C4 cluster catalog. It is important to establish if cluster star-formation properties have a mass dependence before comparing clusters at different epochs, and here we use cluster velocity dispersion as a measure of cluster mass. We find that the total stellar mass, the number of star-forming galaxies, and total star-formation rate scale linearly with the number of member galaxies, with no residual dependence on cluster velocity dispersion. With the mass-dependence of cluster star-formation rates established, we compare the SDSS clusters with a sample of z = 0.75 clusters from the literature and find that on average the total H-alpha luminosity of the high-redshift clusters is 10 times greater than that of the low-redshift clusters. This can be explained by a decline in the H-alpha luminosities of individual cluster galaxies by a factor of up to 10 since z = 0.75. The magnitude of this evolution is comparable to that of field galaxies over a similar redshift interval, and thus the effect of the cluster environment on the evolution of star-forming galaxies is at most modest. Our results suggest that the physical mechanism driving the evolution of cluster star-formation rates is independent of cluster mass, at least for clusters with velocity dispersion greater than 450 km/s, and operates over a fairly long timescale such that the star-formation rates of individual galaxies decline by an order of magnitude over ~7 billion years. (Abridged)
Год издания: 2008
Авторы: Rose Finn, Michael L. Balogh, Dennis Zaritsky, Christopher J. Miller, R. C. Nichol
Издательство: IOP Publishing
Источник: The Astrophysical Journal
Ключевые слова: Galaxies: Formation, Evolution, Phenomena, Astronomy and Astrophysical Research, Stellar, planetary, and galactic studies
Другие ссылки: The Astrophysical Journal (PDF)
The Astrophysical Journal (HTML)
Portsmouth Research Portal (University of Portsmouth) (PDF)
Portsmouth Research Portal (University of Portsmouth) (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
DataCite API (HTML)