Tidal dwarf galaxies around a post-merger galaxy, NGC4922

Yun Kyeong Sheen, Hyunjin Jeong, Sukyoung K. Yi, Ignacio Ferreras, Jennifer M. Lotz, Knut A.G. Olsen, Mark Dickinson, Sydney Barnes, Jang Hyun Park, Chang H. Ree, Barry F. Madore, Tom A. Barlow, Tim Conrow, Karl Foster, Peter G. Friendman, Young Wook Lee, D. Christopher Martin, Patrick Morrissey, Susan G. Neff, David SchiminovichMark Seibert, Todd Small, Ted K. Wyder

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


One possible channel for the formation of dwarf galaxies involves birth in the tidal tails of interacting galaxies. We report the detection of a bright UV tidal tail and several young tidal dwarf galaxy (TDG) candidates in the post-merger galaxy NGC4922 in the Coma cluster. Based on a two-component population model (combining young and old stellar populations), we find that the light of tidal tail predominantly comes from young stars (a few Myr old). The Galaxy Evolution Explorer ultraviolet data played a critical role in the parameter (age and mass) estimation. Our stellar mass estimates of the TDG candidates are ∼106-7 M , typical for dwarf galaxies.

Original languageEnglish
Pages (from-to)1911-1916
Number of pages6
JournalAstronomical Journal
Issue number6
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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