=========================================================================
"Statistical and Physical Infrared properties of AGN as measured by SWIRE"
Dr. Evanthia Hatziminaoglou
Instituto de Astrofisica de Canarias, Spain

When:  Thursday, 15 December 2005 at 3:30pm
Where: 2nd Floor Seminar Room

SWIRE, the Spitzer Wide-area InfraRed Extragalactic survey is the
largest of the Spitzer Legacy programs, covering ~49 sq. degrees in
all IRAC (3.6 to 8.0 micron) and MIPS (24, 70 and 160 micron)
bands. The final Legacy Extragalactic Catalogue will contain more than
two million IR-selected sources dominated by luminous infrared
galaxies, early-type galaxies, some 30,000 classical AGN and as many
as 250,000 dust-obscured QSO/AGN. The SWIRE fields have extensive
observations in other wavebands, particularly in the optical, near-IR
and X-ray. This multitude of data allows for the first time a detailed
study of the SEDs of AGN, the development of AGN candidate techniques
free of the biases introduced by the traditional optical selection
methods, the simultaneous investigation of the physics of the various
regions composing these objects with particular emphasis on the dusty
tori properties, and the study of their connection to normal and
starburst galaxies. Detailed modeling of the dusty tori surrounding
the AGN can greatly benefit from SWIRE data. The IRAC and MIPS 24
micron data points impose strong constraints on the model parameters,
such as the torus size, density law, and optical depth. Models with
intermediate outer radii and density decreasing with increasing
distance from the center are favored, while low optical depths are not
ruled out.
=========================================================================

Evanthia obtained her undergraduate degree in Physics from the
Univ. of Thessaloniki and her Ph.D. in observational astrophysics from
Toulouse France in 2000. After a postdoc at ESO she has been working,
since 2003, as a research associate with the SWIRE team at IAC in
Tenerife. She will be in our department all day Thursday the 15th and
Friday the 16th of December.