Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541217c&link_type=abstract
American Astronomical Society, AAS Meeting #215, #412.17; Bulletin of the American Astronomical Society, Vol. 42, p.248
Mathematics
Logic
Scientific paper
Luminous blue compact galaxies (LBCGs) are morphologically complex systems showing evidence for long duration, interaction-induced star formation, and appear to be in the process of `assembling’ themselves. We define LBCGs as optically blue [(B-V) < 0.5], luminous (MB < -19.0) systems containing one or more high-surface brightness knots. Apparently lacking an AGN component to account for these properties, LBCGs are undergoing intense bursts of massive star formation as evidenced by their narrow emission-line spectra similar to the HII galaxies described by Kniazev et al (2004). In contrast to another, possibly related, class of star-forming systems, ultraluminous infrared galaxies (ULIRGs), the stellar populations within LBCGs can be observed directly due to an absence of strongly obscuring dust. Though observed with greater frequency at higher redshifts, a significant number of local (z < 0.1) LBCGs are found in the Sloan Digital Sky Survey. We have searched the SDSS spectroscopic database producing a large ( 103) sample of LBCGs, which we are using to describe their morphological structures and space density. Some objects exhibit extremely blue colors for their observed luminosity. Many of these systems were detected by both IRAS and GALEX; we use these data to derive their star formation rates and their morphological class. A more complete picture of these local starburst systems will provide clues to the processes responsible for the assembly of galaxies earlier in cosmic time.
Chojnowski Drew
Fanelli Michael N.
Marcum Pamela Marie
Newton C.
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