Dust-to-Gas Ratios in Early-type Galaxies

Details Dust-to-Gas Ratios in Early-type Galaxies Dust-to-Gas Ratios in Early-type Galaxies

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21944414c&link_type=abstract

American Astronomical Society, AAS Meeting #219, #444.14

Astronomy and Astrophysics

Astronomy

Scientific paper

We present dust-to-gas ratios for all possible galaxies of the Atlas3D early-type galaxy sample using IRAS measurements to constrain the dust mass. Cold gas masses are combined molecular and atomic masses, determined from single-dish CO and interferometric HI measurements obtained as part of the Atlas3D survey. Many early-type galaxies exhibit high dust-to-gas ratios (above that of the Galaxy) and thus likely have a high metal-content ISM. However, a few have much lower dust-to-gas ratios, signaling the acquisition of their gas from a lower-metallicity source. Additionally, using higher-sensitivity Herschel data for 3 galaxies with outer HI distributions, we present dust-to-gas ratios for these galaxies. Two of these three galaxies have extremely low dust-to-gas ratios with only upper limits on their dust masses, despite the sensitivity of Herschel. Little dust thus exists in these outer distributions of HI, either dust destruction is rapid in these environments or the ISM is very deficient in the metals required to form dust.

Affiliated with

Also associated with

No associations

Rating

Dust-to-Gas Ratios in Early-type 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 Dust-to-Gas Ratios in Early-type Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust-to-Gas Ratios in Early-type Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-748316