Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-30
Astrophys.J.655:L65-L68,2007
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures; accepted to ApJ Letter, small changes from submitted version
Scientific paper
10.1086/512038
We present mid-infrared spectra of 5 submillimeter galaxies at z=0.65-2.38 taken with the Spitzer Space Telescope. Four of these sources, at z<1.5, have strong PAH features and their composite spectrum is well fitted by an M82-like spectrum with an additional power-law component consistent with that expected from AGN activity. Based on a comparison of the 7.7-micron PAH equivalent width and the PAH-to-infrared luminosity ratio of these galaxies with local templates, we conclude that these galaxies host both star-formation and AGN activity, with star-formation dominating the bolometric luminosity. The source at z=2.38 displays a Mrk231-type broad feature at restframe ~8 micron that does not conform to the typical 7.7/8.6 micron PAH complex in starburst galaxies, suggesting a more substantial AGN contribution.
Alexander Dave M.
Armus Lee
Blain Andrew W.
Chapman Scott C.
Frayer Dave
No associations
LandOfFree
Mid-Infrared Spectroscopy of High Redshift Submillimeter Galaxies: First Results 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 Mid-Infrared Spectroscopy of High Redshift Submillimeter Galaxies: First Results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mid-Infrared Spectroscopy of High Redshift Submillimeter Galaxies: First Results will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-46229