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Date and Time of the Query: 2019-04-21 T12:03:08 PDT
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For refcode 2000ApJ...531..665K:
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Copyright by American Astronomical Society. Reproduced by permission
2000ApJ...531..665K Luminosity versus Phase-Space-Density Relation of Galaxies Revisited Keiichi Kodaira and Nobunari Kashikawa National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588 Japan and Toru Misawa Department of Astronomy, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033 Japan Received 1999 June 11; accepted 1999 November 26 ABSTRACT We reexamined the correlation between the B_T_ magnitude and the phase- space -density parameter w = (D_25_^2^ vc)^-1^ of galaxies for the Virgo, the Coma, the Fornax, and the Perseus clusters in an effort to better understand the physical underpinning of the fundamental plane. A tight correlation (B_T_ = a log w + b) common to different morphological types of galaxies (E, S0, S) was found for the Virgo and the Coma clusters, with a = 1.87 +/- 0.10 and 1.33 +/0- 0.11, respectively. An investigation using only E galaxies was made for the four clusters. The results indicated that the empirical linear relation might be common among the Coma, the Fornax, and the Perseus clusters, with the Virgo Cluster showing deviation. This relation, which is another way to project the fundamental plane, has an expression insensitive to the morphology and may be suitable for treating galaxies of different morphological types collectively. Subject headings: galaxies: clusters: general-galaxies: kinematics and dynamics-galaxies: photometry-galaxies: structure
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