Stellar Excesses and Galaxy Counts in Archival IRS Peak-Up

Details Stellar Excesses and Galaxy Counts in Archival IRS Peak-Up Stellar Excesses and Galaxy Counts in Archival IRS Peak-Up

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542807b&link_type=abstract

American Astronomical Society, AAS Meeting #215, #428.07; Bulletin of the American Astronomical Society, Vol. 42, p.345

Astronomy and Astrophysics

Astronomy

Scientific paper

The short-low module of the Infrared Spectrograph (IRS), on-board the Spitzer Space Telescope, has serendipitously imaged sky positions in the Peak-Up (PU) fields for targeted short-low spectral observations. The resulting imaging and photometric data at 16 and 22 µm provide coverage between the IRAC 8 µm and MIPS 24 µm bands (although not every PU field has existing coverage from these instruments). We are analyzing these PU data with the goal of eventually releasing to the community a photometric catalog of both stellar and extragalactic point sources obtained from our measurements.
Our scientific interests are to search for stars with excess infrared emission from dust and investigate both main-sequence star debris disks, indicative of planetary formation, and circumstellar shells of evolved objects. We will also study galaxy evolution through deep source counts at 16 µm. These source counts will let us measure the evolution of the spectral energy distributions of galaxies, particularly in PAH emission and silicate absorption features.
This work is based on archival data obtained with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.

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