2007/10/19 by Duilia F. de Mello, D. F. de Mello, Sergio Torres-Flores +3 · 3 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.1088/0004-6256/135/1/319
published as Astron.J.135:319-325,2008 · 21 pages, 5 figures. Accepted for publication in Astronomical Journal
arxiv created 2007/10/19 · openalex publication_date 2007/12/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We use multiwavelength data (H i , FUV, NUV, R ) to search for evidence of star formation in the intragroup medium of the Hickson Compact Group 100. We find that young star-forming regions are located in the intergalactic H i clouds of the compact group which extend to over 130 kpc away from the main galaxies. A tidal dwarf galaxy (TDG) candidate is located in the densest region of the H i tail, 61 kpc from the brightest group member and its age is estimated to be only 3.3 Myr. Fifteen other intragroup H ii regions and TDG candidates are detected in the Galaxy Evolution Explorer ( GALEX ) FUV image and within a field 10' × 10' encompassing the H i tail. They have ages <200 Myr, H i masses of 10 9.2–10.4 M ⊙ , 0.001 <SFR <0.01 M ⊙ yr −1 , and stellar masses 10 4.3 –10 6.5 M ⊙ . The H i clouds to which many of them are associated have column densities about one order of magnitude lower than N(H i ) ∼10 21 cm −2 .