Optical and NIR investigation of a sample of tidal dwarf candidates

We analyzed a sample of 44 candidates for Tidal Dwarf Galaxies (TDGs) previously selected on optical imaging with low resolution spectroscopy. Most of the TDG candidates have the same redshift as the interacting system, 3 of them very likely are low metallicity dwarf galaxies in projection, and 13 s...

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Veröffentlicht in:	Astrophysics and space science 2003-01, Vol.284 (2), p.639-642
Hauptverfasser:	Weilbacher, Peter M, Fritze-von Alvensleben, U, Duc, P-a
Format:	Artikel
Sprache:	eng
Schlagworte:	Astrophysics Candidates Star & galaxy formation Stars & galaxies
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	We analyzed a sample of 44 candidates for Tidal Dwarf Galaxies (TDGs) previously selected on optical imaging with low resolution spectroscopy. Most of the TDG candidates have the same redshift as the interacting system, 3 of them very likely are low metallicity dwarf galaxies in projection, and 13 show signs of kinematics decoupled from their hosting tidal tail. Subsequent NIR photometry in combination with evolutionary synthesis modeling allows us to derive stellar masses, star formation rates, and the ratio of old to young stars within each TDG candidate.
ISSN:	0004-640X 1572-946X
DOI:	10.1023/A:1024082728293