The Faint End of the Luminosity Function in the Core of the Coma Cluster | Zendy

Margaret Milne | Zendy; C. J. Pritchet | Zendy; Gregory B. Poole | Zendy; Stephen Gwyn | Zendy; J. J. Kavelaars | Zendy; William E. Harris | Zendy; David A. Hanes | Zendy

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The Faint End of the Luminosity Function in the Core of the Coma Cluster

Author(s) -

Margaret Milne,

C. J. Pritchet,

Gregory B. Poole,

Stephen Gwyn,

J. J. Kavelaars,

William E. Harris,

David A. Hanes

Publication year - 2006

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 - 10.1086/509733

Subject(s) - coma cluster , physics , astrophysics , luminosity function , reionization , coma (optics) , galaxy , luminosity , hubble space telescope , cosmic variance , redshift , astronomy , cosmic cancer database , limiting , galaxy cluster , mechanical engineering , engineering

We present optical measurements of the faint end of the luminosity functionin the core of the Coma cluster. Dwarf galaxies are detected down to a limitingmagnitude of R approx. 25.75 in images taken with the Hubble Space Telescope.This represents the faintest determination of the Coma luminosity function todate. With the assumption that errors due to cosmic variance are small,evidence is found for a steep faint end slope with alpha < -2. Such a value isexpected in theories in which reionization and other feedback processes aredependent on density.Comment: 10 pages, 8 figures, 4 tables. Accpeted to the Astronomical Journa

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