A potential galaxy threshing system in the COSMOS field

S. S. Sasaki, Y. Taniguchi, N. Scoville, B. Mobasher, H. Aussel, D. B. Sanders, A. Koekemoer, M. Ajiki, Y. Komiyama, S. Miyazaki, N. Kaifu, H. Karoji, S. Okamura, N. Arimoto, K. Ohta, Y. Shioya, T. Murayama, T. Nagao, J. Koda, L. HainlineA. Renzini, M. Giavalisco, O. Le Fèvre, C. Impey, M. Elvis, S. Lilly, M. Rich, E. Schinnerer, K. Sheth

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


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 M v ≈ -21.6 and a tidally disrupted satellite galaxy with M v PS -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 × 10 12 and 3.7 × 10 9 M , 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.

Original languageEnglish (US)
Pages (from-to)511-517
Number of pages7
JournalAstrophysical Journal, Supplement Series
Issue number1
StatePublished - 2007


  • Galaxies: evolution
  • Galaxies: interactions

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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