Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-02
Astronomy and Astrophysics
Astrophysics
13 pages, 3 figures, accepted for publication in ApJL
Scientific paper
10.1086/522050
Recent Spitzer observations have revealed a substantial population of z~2 ULIRGs with deep silicate absorption (\tau_{9.7}>1). This paper reports a 20cm radio study of such a sample to elucidate their physical nature. We discover that a substantial fraction (40%) of deep silicate absorption ULIRGs at z~2 are moderately radio-loud with L_{1.4GHz}=10^{25}--10^{26}WHz^{-1}. This is in strong contrast with z<1 radio galaxies and radio-loud quasars where none of the sources with available IRS spectra have \tau_{9.7}>1. In addition, we observe radio jets in two of our sources where one has a double lobe structure ~200kpc in extent, and another shows a one-sided jet extending ~90kpc from the nucleus. The likely high inclination of the latter, coupled with its deep silicate absorption, implies the mid-IR obscuration does not share an axis with the radio jets. These sources are highly obscured quasars, observed in the transition stage after the birth of the radio source, but before feedback effects dispel the ISM and halt the black hole accretion and starburst activity.
Huynh Minh
Lacy Mark
Sajina Anna
Yan Lin
No associations
LandOfFree
Discovery of Radio Jets in z~2 ULIRGs with Deep 9.7um Silicate Absorption 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 Discovery of Radio Jets in z~2 ULIRGs with Deep 9.7um Silicate Absorption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of Radio Jets in z~2 ULIRGs with Deep 9.7um Silicate Absorption will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-601601