Blue Blobs in Compact Groups of Galaxies

Details Blue Blobs in Compact Groups of Galaxies Blue Blobs in Compact Groups of Galaxies

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21330406d&link_type=abstract

American Astronomical Society, AAS Meeting #213, #304.06; Bulletin of the American Astronomical Society, Vol. 41, p.274

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the discovery of a population of young blue objects, similar to M81/M82 blue blobs (de Mello et al. 2008), outside galaxies in compact groups. These blue blobs were found using multiwavelength data (UV, HI, optical) for the compact groups of galaxies HCG 2, 7, 22, 23, 92, 100 and NGC 92 which are in different stages of interaction. We find that all three evolved groups, HCG92, HCG100 and NGC 92, contain a population of young blue objects consistent with having ages < 100 Myr. Moreover, they also show extended HI tails and peculiar velocity field. Our results indicate that the blue blobs are stellar clusters and/or dwarf galaxies formed in the intra-group HI clouds of groups in advanced stage of interaction .

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