An Aromatic Feature Emission Inventory of the Local Volume

Details An Aromatic Feature Emission Inventory of the Local Volume An Aromatic Feature Emission Inventory of the Local Volume

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21520209m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #202.09; Bulletin of the American Astronomical Society, Vol. 42, p.294

Statistics

Methodology

Scientific paper

Using infrared photometry from the Spitzer Space Telescope, we perform the first inventory of aromatic feature emission for a large unbiased sample of galaxies in the local volume. The photometric methodology involved is calibrated and demonstrated to recover the aromatic fraction of the IRAC 8 micron flux with a standard deviation of 6% using a training set of 40 SINGS galaxies for which both equivalent photometry and suitable mid-infrared Spitzer IRS spectra were available. The resulting technique is then applied to the 258 galaxies from the Local Volume Legacy (LVL) survey, a large sample dominated by low-luminosity dwarf galaxies for which obtaining comparable MIR spectroscopy is not feasible. We find the total LVL luminosity due to five strong aromatic features in the 8 micron complex to be 2.47E10 solar luminosities with a mean volume density of 8.8E6 solar luminosities per cubic Mpc. Correspondingly, the same values for all mid-infrared aromatic features in the wavelength range 5.5-20 microns are approximately 1.9 times larger. Using oxygen abundances compiled from the literature, we report a correlation between aromatic feature strength and metallicity, albeit one with significant scatter.

Affiliated with

Also associated with

No associations

Rating

An Aromatic Feature Emission Inventory of the Local Volume 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 An Aromatic Feature Emission Inventory of the Local Volume, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Aromatic Feature Emission Inventory of the Local Volume will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-960903