Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..548v&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 106, no. 2, p. 548-559.
Astronomy and Astrophysics
Astronomy
215
Brightness Distribution, Galactic Structure, Star Formation, Very Large Array (Vla), Data Reduction, Spiral Galaxies
Scientific paper
Low Surface Brightness (LSB) galaxies appear to have low star formation rates despite their often quite normal H I contents as judged from global H I properties such as M(H I)/L and M(H I)/M(T) ratios. H I imaging with the VLA of the National Radio Astronomy Observatory of eight LSB galaxies shows that the H I is extended compared with the optical size and has average surface densities which are about a factor 2 lower than in High Surface Brightness (HSB) galaxies of the same type. The resolution of the H I imaging allows a rough rotation curve analysis for evaluating the critical density for star formation as formulated by Kennicutt (1989). The observed H I surface densities systematically fall below this critical density for most of the galaxies in this sample, in agreement with the low current star formation rates. From the optical surface photometry we conclude that the galaxies studied are in general late-type galaxies dominated by an exponential disk with a typical scale length of a few kpc. The B-R and V-I colors of the LSB galaxies are a few tenths of a magnitude bluer than those of HSB galaxies indicating that the disks of these galaxies have a mean young age.
Bothun Gragory D.
de Blok J. G. W.
McGaugh Stacy S.
Skillman Evan D.
Smith Toby R.
No associations
LandOfFree
Star formation thresholds in Low Surface Brightness 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 Star formation thresholds in Low Surface Brightness galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Star formation thresholds in Low Surface Brightness galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1490822