Published December 2009
| Published
Journal Article
Open
Tidal Dwarf Galaxies Around a Post-merger Galaxy, NGC 4922
- Creators
- Sheen, Yun-Kyeong
- Jeong, Hyunjin
- Yi, Sukyoung K.
- Ferreras, Ignacio
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Lotz, Jennifer M.
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Olsen, Knut A. G.
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Dickinson, Mark
- Barnes, Sydney
- Park, Jang-Hyun
- Ree, Chang H.
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Madore, Barry F.
- Barlow, Tom A.
- Conrow, Tim
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Foster, Karl
- Friendman, Peter G.
- Lee, Young-Wook
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Martin, D. Christopher
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Morrissey, Patrick
- Neff, Susan G.
- Schiminovich, David
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Seibert, Mark
- Small, Todd
- Wyder, Ted K.
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 NGC 4922 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 ~10^(6–7) M_☉, typical for dwarf galaxies.
Additional Information
© 2009 American Astronomical Society. Print publication: Issue 6 (2009 December); received 2009 July 28; accepted for publication 2009 October 9; published 2009 November 5. We are indebted to Giuseppe Gavazzi and Alessandro Boselli for supporting our use of the GALEX data made public after their guest investigation acquired them but prior to their use. We thank the anonymous referee for various clarifications. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Doyak 20090078756). S.K.Y. also acknowledges support from Korea Astronomy and Space Science Institute. We have used the GALEX UV data obtained from the Multimission Archive at the Space Telescope Science Institute (MAST). GALEX is operated for NASA by the California Institute of Technology under NASA contract NAS5-98034. We are grateful to the Lowell Observatory for granting observing time and hospitality during our visit.Attached Files
Published - Sheen2009p6482Astron_J.pdf
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Sheen2009p6482Astron_J.pdf
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Additional details
- Eprint ID
- 16919
- Resolver ID
- CaltechAUTHORS:20091209-093951716
- Doyak 20090078756
- Ministry of Education, Science and Technology (Korea)
- Korea Astronomy and Space Science Institute (KASI)
- NAS5-98034
- NASA
- Created
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2009-12-09Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Space Astrophysics Laboratory