Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-03-11
Astronomy and Astrophysics
Astrophysics
accepted for publication in the ApJ Letter
Scientific paper
10.1086/310658
The metallicities derived from spectroscopic observations of a sample of Starburst Nucleus Galaxies (SBNGs) are compared to those of several other types of galaxies (normal giant galaxies, Irregular and HII galaxies) drawn from the literature. The SBNGs are deficient in metals with respect to normal galaxies of same morphological type, suggesting that - SBNGs are galaxies still in the process of formation. Breaking the SBNGs into early-types (Sb and earlier) and late-types reveals that the former seem to follow the same linear luminosity-metallicity relation as the irregular and elliptical galaxies, whereas the latter and the giant spirals show comparable (0.2 and 0.3 dex) excess abundances with respect to the linear relation. This difference between the two types of SBNGs is consistent with the predictions of the model of hierarchical formation of galaxies: the early-type SBNGs are building their bulges by successive mergers of small stellar and gaseous systems, while the late-type SBNGs are mostly accreting gas to form a disk.
Considere Suzanne
Contini Thierry
Coziol Roger
Davoust Emmanuael
No associations
LandOfFree
The Chemical Evolution of Starburst Nucleus Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Chemical Evolution of Starburst Nucleus Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Chemical Evolution of Starburst Nucleus Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-436088