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Title:
A Potential Galaxy Threshing System in the COSMOS Field
Authors:
Sasaki, S. S.; Taniguchi, Y.; Scoville, N.; Mobasher, B.; Aussel, H.; Sanders, D. B.; Koekemoer, A.; Ajiki, M.; Komiyama, Y.; Miyazaki, S.; Kaifu, N.; Karoji, H.; Okamura, S.; Arimoto, N.; Ohta, K.; Shioya, Y.; Murayama, T.; Nagao, T.; Koda, J.; Hainline, L.; Renzini, A.; Giavalisco, M.; Le Fèvre, O.; Impey, C.; Elvis, M.; Lilly, S.; Rich, M.; Schinnerer, E.; Sheth, K.
Affiliation:
AA(Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578, Japan.; Physics Department, Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan.), AB(Physics Department, Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan.), AC(California Institute of Technology, MC 105-24, 1200 East California Boulevard, Pasadena, CA 91125.; Visiting Astronomer, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822.), AD(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218.), AE(Service d'Astrophysique, CEA/Saclay, 91191 Gif-sur-Yvette, France.), AF(Institute for Astronomy, 2680 Woodlawn Drive, University of Hawaii, Honolulu, HI 96822.), AG(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218.), AH(Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578, Japan.), AI(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.), AJ(Subaru Telescope, National Astronomical Observatory, 650 North A`ohoku Place, Hilo, HI 96720.), AK(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.), AL(Subaru Telescope, National Astronomical Observatory, 650 North A`ohoku Place, Hilo, HI 96720.), AM(Department of Astronomy, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.), AN(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.), AO(Department of Astronomy, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan), AP(Physics Department, Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan.), AQ(Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578, Japan.), AR(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.; INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy.), AS(California Institute of Technology, MC 105-24, 1200 East California Boulevard, Pasadena, CA 91125.), AT(California Institute of Technology, MC 105-24, 1200 East California Boulevard, Pasadena, CA 91125.), AU(European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany.), AV(Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218.), AW(Laboratoire d'Astrophysique de Marseille, BP 8, Traverse du Siphon, 13376 Marseille Cedex 12, France.), AX(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AY(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AZ(Department of Physics, Swiss Federal Institute of Technology (ETH-Zurich), CH-8093 Zurich, Switzerland.), BA(Department of Physics and Astronomy, University of California, Los Angeles, CA 90095.), BB(Max Planck Institut für Astronomie, Königstuhl 17, Heidelberg D-69117, Germany.), BC(California Institute of Technology, MC 105-24, 1200 East California Boulevard, Pasadena, CA 91125.; Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125.)
Publication:
The Astrophysical Journal Supplement Series, Volume 172, Issue 1, pp. 511-517. (ApJS Homepage)
Publication Date:
09/2007
Origin:
UCP
ApJ Keywords:
Galaxies: Evolution, Galaxies: Interactions
DOI:
10.1086/516581
Bibliographic Code:
2007ApJS..172..511S

Abstract

We report on the discovery of a new potential galaxy threshing system in the COSMOS 2 square degree field using the prime-focus camera, Suprime-Cam, on the 8.2 m Subaru Telescope. This system consists of a giant elliptical galaxy with MV~-21.6 and a tidally disrupted satellite galaxy with MV~-17.7 at a photometric redshift of z~0.08. This redshift is consistent with the spectroscopic redshift of 0.079 for the giant elliptical galaxy obtained from the Sloan Digital Sky Survey (SDSS) archive. The luminosity masses of the two galaxies are 3.7×1012 and 3.1×109 Msolar, respectively. The distance between the two galaxies is greater than 100 kpc. The two tidal tails emanating from the satellite galaxy extend over 150 kpc. This system would be the second well-defined galaxy threshing system found so far.

Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.


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