Starburst and cirrus models for submillimeter galaxies

Details Starburst and cirrus models for submillimeter galaxies Starburst and cirrus models for submillimeter galaxies

2009-06-02

arxiv.org/abs/0906.0446v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

9 pages, AA accepted

Scientific paper

We present radiative transfer models for submillimeter galaxies with spectroscopic redshifts and mid-infrared spectroscopy from Spitzer/IRS and analyze available Spitzer/MIPS 24, 70 and 160mu data. We use two types of starburst models, a cirrus model and a model for the emission of an AGN torus in order to investigate the nature of these objects. We find that for three of the objects (25%) cirrus emission alone can account for the mid-infrared spectrum and the MIPS and submillimeter data. For the remaining objects we find that we need a combination of starburst and cirrus in order to fit simultaneously the multi--wavelength data. We find that the typical submillimeter galaxy has comparable luminosity in the starburst (median L=10^12.5 Lo) and cirrus (median L=10^12.4 Lo) components. This could arise if the galaxies have been forming stars continuously for the last 250Myr with the star formation occurring in the last 5Myr being shrouded by high-optical-depth molecular cloud dust, whereas the rest of the starlight is attenuated by diffuse dust or cirrus with an Av of about 1mag.

Affiliated with

Also associated with

No associations

Rating

Starburst and cirrus models for submillimeter 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 Starburst and cirrus models for submillimeter galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starburst and cirrus models for submillimeter galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-234938