2007/07/01 by Russell J. Smith, John R. Lucey, Michael J. Hudson
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Line (geometry) #Metallicity #Milky Way #Red shift #Sample (material) #Spectrograph #Supercluster (genetic) #astro-ph
paper · pdf · doi:10.1017/s1743921308018255
published in Proceedings of the International Astronomical Union 3(S245), 411-414 (Cambridge University Press) · Four pages, three figures; To appear in Proceedings of IAU Symp. 245 "Formation and Evolution of Galaxy Bulges", (Oxford, July 16-20 2007), Eds. Martin Bureau, Lia Athanassoula, and Beatriz Barbuy
openalex publication_date 2007/07/01 · arxiv created 2007/12/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract We present results on the stellar populations of 232 quiescent galaxies in the Shapley Supercluster, based on spectroscopy from the AAOmega spectrograph at the AAT. The key characteristic of this survey is its coverage of many low-luminosity objects (σ ~ 50 kms −1 ), with high signal-to-noise (~45 Å −1 ). Balmer-line age estimates are recovered with ~25% precision even for the faintest sample members. We summarize the observations and absorption line data, and present correlations of derived ages and metallicities with mass and luminosity. We highlight the strong correlation between age and α-element abundance ratio, and the anti-correlation of age and metallicity at fixed mass, which is shown to extend into the low-luminosity regime.