Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-06-23
Astronomy and Astrophysics
Astrophysics
10 pages, 5 figures and separate colorplate, uses moriond.sty. Review presented at XVIIIth Rencontre de Moriond `Dwarf Galaxie
Scientific paper
Optical and HI imaging of gas rich dwarfs, both dwarf irregulars (dI) and blue compact dwarfs (BCD), reveals important clues on how dwarf galaxies evolve and their star formation is regulated. Both types usually show evidence for stellar and gaseous disks. However, their total mass is dominated by dark matter. Gas rich dwarfs form with a range of disk structural properties. These have been arbitrarily separated them into two classes on the basis of central surface brightness. Dwarfs with \mu_{0}(B) <~ 22 mag arcsec^{-2} are usually classified as BCDs, while those faintwards of this limit are usually classified as dIs. Both classes experience bursts of star formation, but with an absolute intensity correlated with the disk surface brightness. Even in BCDs the bursts typically represent only a modest <~ 1 mag enhancement to the B luminosity of the disk. While starbursts are observed to power significant galactic winds, the fractional ISM loss remains modest. Dark matter halos play an important role in determining dwarf galaxy morphology by setting the equilibrium surface brightness of the disk.
No associations
LandOfFree
Starbursts, dark matter, and the evolution of dwarf 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 Starbursts, dark matter, and the evolution of dwarf galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starbursts, dark matter, and the evolution of dwarf galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-20213