Exploring the nature of Mid-IR selected buried AGN candidates

Details Exploring the nature of Mid-IR selected buried AGN candidates Exploring the nature of Mid-IR selected buried AGN candidates

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20090h&link_type=abstract

Spitzer Proposal ID #20090

Physics

Scientific paper

Among 3000 sources detected by the ISOCAM Parallel Survey at 6.7 micron in an area of 8 square degrees at high galactic latitude we have discovered a population of extremely infrared unknown objects. With a typical 6.7 micron flux between 4 and 0.7 mJy they have red 2MASS and optical counterparts. The analysis of the ISO and 2MASS colours suggests that we have found AGN with a pronounced near- and mid-IR emission from nuclear dust. We performed optical spectroscopy for 55 of the 80 AGN candidates selected by their red near-mid-IR colors. We find 27% type 1 AGN (redshift range z=0.1-1), 13% type 2 AGN (z=0.1-0.5), and 60% extremely reddened emission line galaxies (ELGs) with LINER and HII type spectra (z=0.07-0.3). Our multi-wavelength examination of the ELGs indicates that they resemble a population different from known IR luminous starburst galaxies. The high MIR/NIR flux ratio and the rather low FIR upper flux limits on IRAS-ADDSCANs argue against a pure starburst nature, suggesting that the red ELGs contain a buried AGN. While new IR surveys from Spitzer will certainly detect new interesting objects of that type, we have already identified a promising IR sample which has been further focussed by optical spectroscopy. Therefore, we apply for 19-38 micron IRS low resolution spectroscopy of 10 red ELGs carefully selected from our sample (6.7 micron flux > 1 mJy). By focussing on really buried AGN candidates and the [Ne V]24.3um and [O IV]25.9um lines, this proposal substantially goes beyond our shallower cycle-1 IRS 5-40 micron observations of MIR selected (mainly type 1 and type 2) AGN.

Affiliated with

Also associated with

No associations

Rating

Exploring the nature of Mid-IR selected buried AGN candidates 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 Exploring the nature of Mid-IR selected buried AGN candidates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploring the nature of Mid-IR selected buried AGN candidates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1166764