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 journalArticle

11 Citations (Scopus)

Abstract

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
Volume138
Issue number6
DOIs
Publication statusPublished - 2009 Dec 1

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dwarf galaxies
merger
galaxies
interacting galaxies
coma
stellar mass
stars
young
estimates

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Sheen, Y. K., Jeong, H., Yi, S. K., Ferreras, I., Lotz, J. M., Olsen, K. A. G., ... Wyder, T. K. (2009). Tidal dwarf galaxies around a post-merger galaxy, NGC4922. Astronomical Journal, 138(6), 1911-1916. https://doi.org/10.1088/0004-6256/138/6/1911
Sheen, Yun Kyeong ; Jeong, Hyunjin ; Yi, Sukyoung K. ; Ferreras, Ignacio ; Lotz, Jennifer M. ; Olsen, Knut A.G. ; Dickinson, Mark ; Barnes, Sydney ; Park, Jang Hyun ; Ree, Chang H. ; Madore, Barry F. ; Barlow, Tom A. ; Conrow, Tim ; Foster, Karl ; Friendman, Peter G. ; Lee, Young Wook ; Martin, D. Christopher ; Morrissey, Patrick ; Neff, Susan G. ; Schiminovich, David ; Seibert, Mark ; Small, Todd ; Wyder, Ted K. / Tidal dwarf galaxies around a post-merger galaxy, NGC4922. In: Astronomical Journal. 2009 ; Vol. 138, No. 6. pp. 1911-1916.
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Sheen, YK, Jeong, H, Yi, SK, Ferreras, I, Lotz, JM, Olsen, KAG, Dickinson, M, Barnes, S, Park, JH, Ree, CH, Madore, BF, Barlow, TA, Conrow, T, Foster, K, Friendman, PG, Lee, YW, Martin, DC, Morrissey, P, Neff, SG, Schiminovich, D, Seibert, M, Small, T & Wyder, TK 2009, 'Tidal dwarf galaxies around a post-merger galaxy, NGC4922', Astronomical Journal, vol. 138, no. 6, pp. 1911-1916. https://doi.org/10.1088/0004-6256/138/6/1911

Tidal dwarf galaxies around a post-merger galaxy, NGC4922. / Sheen, Yun Kyeong; Jeong, Hyunjin; Yi, Sukyoung K.; Ferreras, Ignacio; Lotz, Jennifer M.; Olsen, Knut A.G.; Dickinson, Mark; Barnes, Sydney; Park, Jang Hyun; Ree, Chang H.; Madore, Barry F.; Barlow, Tom A.; Conrow, Tim; Foster, Karl; Friendman, Peter G.; Lee, Young Wook; Martin, D. Christopher; Morrissey, Patrick; Neff, Susan G.; Schiminovich, David; Seibert, Mark; Small, Todd; Wyder, Ted K.

In: Astronomical Journal, Vol. 138, No. 6, 01.12.2009, p. 1911-1916.

Research output: Contribution to journalArticle

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T1 - Tidal dwarf galaxies around a post-merger galaxy, NGC4922

AU - Sheen, Yun Kyeong

AU - Jeong, Hyunjin

AU - Yi, Sukyoung K.

AU - Ferreras, Ignacio

AU - Lotz, Jennifer M.

AU - Olsen, Knut A.G.

AU - Dickinson, Mark

AU - Barnes, Sydney

AU - Park, Jang Hyun

AU - Ree, Chang H.

AU - Madore, Barry F.

AU - Barlow, Tom A.

AU - Conrow, Tim

AU - Foster, Karl

AU - Friendman, Peter G.

AU - Lee, Young Wook

AU - Martin, D. Christopher

AU - Morrissey, Patrick

AU - Neff, Susan G.

AU - Schiminovich, David

AU - Seibert, Mark

AU - Small, Todd

AU - Wyder, Ted K.

PY - 2009/12/1

Y1 - 2009/12/1

N2 - 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.

AB - 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.

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JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

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Sheen YK, Jeong H, Yi SK, Ferreras I, Lotz JM, Olsen KAG et al. Tidal dwarf galaxies around a post-merger galaxy, NGC4922. Astronomical Journal. 2009 Dec 1;138(6):1911-1916. https://doi.org/10.1088/0004-6256/138/6/1911