Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21331705g&link_type=abstract
American Astronomical Society, AAS Meeting #213, #317.05; Bulletin of the American Astronomical Society, Vol. 41, p.296
Astronomy and Astrophysics
Astrophysics
Scientific paper
Using the APEX sub-mm telescope we have investigated the 12CO(3-2) emission of the ISM in five face-on nearby barred spirals, where three of them are high surface brightness galaxies (HSBs) lying at the Freeman limit, and two are low surface brightness galaxies (LSBs) with low metallicity. We have positive detections for two of the three HSBs spirals and non-detections for the LSBs. From the data we derive kinematic properties of the molecular gas, as well as atomic-to-molecular mass ratios. Given the morphology of the sample galaxies, we speculate that bars could dynamically favor the 12CO(3-2) emission, as a second parameter after surface brightness. Therefore, secular evolution could play a major role in boosting molecular gas collisions, such as those generating the transition 12CO(3-2), preventing the gas from collapsing and form stars. Therefore, a warm molecular ISM could be a plausible scenario to explain why LSBs have low SFRs and lack emission in low temperature transitions, like 12CO(1-0).
I acknowledge grant FONDECYT 1085267, and Center for Astrophysics FONDAP 15010003.
No associations
LandOfFree
A Warmer Interstellar Medium for 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 A Warmer Interstellar Medium for Low Surface Brightness Galaxies?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Warmer Interstellar Medium for Low Surface Brightness Galaxies? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1697710