TIDAL DWARF GALAXIES AROUND A POST-MERGER GALAXY, NGC 4922

被引：11

作者：

Sheen, Yun-Kyeong ^{[1
]}

Jeong, Hyunjin ^{[1
]}

Yi, Sukyoung K. ^{[1
]}

Ferreras, Ignacio ^{[2
]}

Lotz, Jennifer M. ^{[3
]}

Olsen, Knut A. G. ^{[3
]}

Dickinson, Mark ^{[3
]}

Barnes, Sydney ^{[4
]}

Park, Jang-Hyun ^{[5
]}

Ree, Chang H.

Madore, Barry F. ^{[6
]}

Barlow, Tom A. ^{[7
]}

Conrow, Tim ^{[7
]}

Foster, Karl ^{[7
]}

Friendman, Peter G. ^{[7
]}

Lee, Young-Wook ^{[1
]}

Martin, D. Christopher ^{[7
]}

Morrissey, Patrick ^{[7
]}

Neff, Susan G. ^{[8
]}

Schiminovich, David ^{[9
]}

Seibert, Mark ^{[6
]}

Small, Todd ^{[7
]}

Wyder, Ted K. ^{[7
]}

机构：

[1] Yonsei Univ, Dept Astron, Seoul 120749, South Korea

[2] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[3] Natl Opt Astron Observ, Tucson, AZ 85719 USA

[4] Lowell Observ, Flagstaff, AZ 86001 USA

[5] Korea Astron & Space Sci Inst, Taejon 305348, South Korea

[6] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA

[7] CALTECH, Pasadena, CA 91125 USA

[8] NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771 USA

[9] Columbia Univ, Dept Astron, New York, NY 10027 USA

来源：

ASTRONOMICAL JOURNAL | 2009年 / 138卷 / 06期

关键词：

galaxies: dwarf; galaxies: individual (NGC 4922); galaxies: interactions; galaxies: starburst; ultraviolet: galaxies; GLOBULAR-CLUSTER FORMATION; STAR-FORMATION; INTERACTING GALAXIES; EVOLUTION-EXPLORER; TAILS; GAS; CANDIDATE; NGC-4038/39; EMISSION; ANTENNAE;

D O I：

10.1088/0004-6256/138/6/1911

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 similar to 10(6-7) M-circle dot, typical for dwarf galaxies.

引用

页码：1911 / 1916

页数：6

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