Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
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Spitzer_Approved_<strong>Extragalactic</strong><br />
Mar 25, 10 16:24 Page 319/742<br />
Spitzer Space Telescope − Guaranteed Time Observer Proposal #30775<br />
IRS Spectroscopy <strong>of</strong> Gravitationally Lensed z>1 Infrared−Luminous Galaxies<br />
Principal Investigator: George Rieke<br />
Institution: The University <strong>of</strong> Arizona<br />
Technical Contact: Eiichi Egami, U. Arizona<br />
Co−Investigators:<br />
Eiichi Egami, Steward Observatory, University <strong>of</strong> Arizona<br />
Jane Rigby, Steward Observatory, University <strong>of</strong> Arizona<br />
Delphine Marcillac, Steward Observatory, University <strong>of</strong> Arizona<br />
Jean−Paul Kneib, OAMP, Marseille/France<br />
Graham Smith, University <strong>of</strong> Birmingham<br />
Dean Hines, Space Science <strong>Institute</strong><br />
Science Category: high−z galaxies (z>0.5)<br />
Observing Modes: IrsStare<br />
Hours Approved: 49.9<br />
Abstract:<br />
Cosmological deep surveys have detected 24 um sources down to ~50 uJy in a<br />
number <strong>of</strong> well−studied fields (e.g., HDF−N, CDF−S), enabling us to study<br />
infrared galaxies out to z~3. Unfortunately, very little is known about the<br />
mid−infrared spectral properties <strong>of</strong> the ~1, 24 um−selected galaxies behind<br />
massive galaxy clusters. These massive clusters have amplified our targets by<br />
factors <strong>of</strong> 3−−20 (and in one case, 180!), which would save hundreds <strong>of</strong> hours in<br />
observing time compared to unlensed sources. Thus, we can probe the nature <strong>of</strong><br />
sources near the 24 um confusion limit with 50 hours <strong>of</strong> Spitzer time. These IRS<br />
spectra will directly constrain the spectral shapes <strong>of</strong> the faint, z>1 galaxies<br />
that constitute ~40% <strong>of</strong> the 24um deep survey number counts, thus providing<br />
crucial constraints to models. They will allow us to estimate the PAH strength<br />
in moderate−−luminosity galaxies and thus constrain the AGN contribution; to<br />
calibrate photometric redshift algorithms; and to explore the faint−end slope <strong>of</strong><br />
the luminosity function.<br />
Spitzer_Approved_<strong>Extragalactic</strong><br />
Printed_by_SSC<br />
Mar 25, 10 16:24 Page 320/742<br />
Spitzer Space Telescope − Guaranteed Time Observer Proposal #40409<br />
IRS Spectroscopy <strong>of</strong> Gravitationally Lensed z>1 Infrared−Luminous Galaxies<br />
Principal Investigator: George Rieke<br />
Institution: University <strong>of</strong> Arizona<br />
Technical Contact: Eiichi Egami, University <strong>of</strong> Arizona<br />
Co−Investigators:<br />
Jane Rigby, OCIW<br />
Eiichi Egami, Univ. <strong>of</strong> Arizona<br />
Delphine Marcillac, Univ. <strong>of</strong> Arizona<br />
Casey Papovich, Univ. <strong>of</strong> Arizona<br />
Christopher Willmer, Univ. <strong>of</strong> Arizona<br />
Johan Richard, Caltech<br />
Jean−Paul Kneib, Laboratoire d’Astrophysique de Marseille<br />
Graham Smith, Univ Birmingham<br />
Dean Hines, Space Science <strong>Institute</strong><br />
Dario Fadda, NASA Herschel Science Center / Caltech<br />
Science Category: high−z galaxies (z>0.5)<br />
Observing Modes: IrsMap<br />
Hours Approved: 37.9<br />
Abstract:<br />
MIPS has detected 24um sources down to 50 uJy in well−studied fields (e.g.,<br />
HDF−N, CDF−S), enabling us to study infrared galaxies out to z~3.<br />
Unfortunately, very little is known about the mid−infrared spectral properties<br />
<strong>of</strong> the ~