Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341909h&link_type=abstract
American Astronomical Society, AAS Meeting #213, #419.09; Bulletin of the American Astronomical Society, Vol. 41, p.235
Astronomy and Astrophysics
Astronomy
Scientific paper
We present VLA HI synthesis imaging of four gas-rich dwarf galaxies selected from a sample of 101 dwarf galaxies with optical luminosities between -13>MR>-15. Our sample galaxies reside in environments ranging from dense galaxy groups to isolated regions, yet all have similar star formation rates, dynamical masses, and optical sizes. Position-velocity diagrams for each system appear to show a velocity turnover at large radii on both the approaching and receding sides. From this, we are able to produce resolved HI rotation curves that provide us with more reliable dynamical mass estimates than those provided by Hα rotation curves. By measuring the spatial extent of HI in these gas-rich, low mass galaxies we can study the influence of external mechanisms on the gas content of galaxies as well as probe the two-dimensional gas dynamics of these systems.
Blanton Michael
Geha Marla
Ho Ngoc-Nhung
West Andrew A.
No associations
LandOfFree
VLA Observations of Gas-rich 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 VLA Observations of Gas-rich Dwarf Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLA Observations of Gas-rich Dwarf Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1702375