Galaxy Population Properties in the Rich Clusters MS 0839.8+2938, MS 1224.7+2007, and MS 1231.3+1542 | Zendy

J. B. Hutchings | Zendy; Louise O. V. Edwards | Zendy

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Galaxy Population Properties in the Rich Clusters MS 0839.8+2938, MS 1224.7+2007, and MS 1231.3+1542

Author(s) -

J. B. Hutchings,

Louise O. V. Edwards

Publication year - 2000

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/301255

Subject(s) - physics , astrophysics , velocity dispersion , galaxy cluster , galaxy , cluster (spacecraft) , redshift , population , brightest cluster galaxy , astronomy , computer science , demography , sociology , programming language

This paper discusses the galaxy populations of three rich clusters, withredshift 0.19 (0839+29), 0.24 (1231+15), and 0.32 (1224+20), from the databaseof the CNOC1 consortium. The data consist of spectra of 52 cluster members for0839+29, 30 members for 1224+15, and 82 members for 1231+15, and there arecomparable numbers of field galaxy spectra. 0839+29 is compact with no strongradial gradients, and possibly dusty. 1224+20 is isolated in redshift, has lowvelocity dispersion around the cD galaxy, and low 4000A break. 1231+15 isasymmetrical and we discuss the possibility that it may be a recent merger oftwo old clusters. We find few galaxies in 0839+29 and 1231+15 with ongoing orrecently truncated star-formation.Comment: 16 pages and 20 diagrams, to appear in A

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