Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 255/742 Spitzer Space Telescope − Guaranteed Time Observer Proposal #8 The IRAC Deep Survey Principal Investigator: Giovanni Fazio Institution: Harvard−Smithsonian Astrophysical Observatory Technical Contact: Jiasheng Huang, CfA Science Category: high−z galaxies (z>0.5) Observing Modes: IracMap MipsScan Hours Approved: 232.1 Abstract: The IRAC Deep survey is the major IRAC GTO science program. The primary objective of this program is to study the formation and evolution of normal galaxies to redshifts z>3. Identifying the initial epoch of galaxy formation and understanding the evolution of the galactic star formation rate as a function of redshift are two of the most important goals of observational astronomy. We select the Groth strip as our survey field which is also a survey field for the DEEP project, an ultra deep redshift survey project using Keck telescopes. The depth of the survey will be 6 uJy for 10sigma at the 8um band. This survey will cover 10’X2 deg area. This coverage will allow us to construct a luminosity function for L_* galaxies at z=3. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 256/742 Spitzer Space Telescope − General Observer Proposal #3630 Very Deep IRAC imaging of MS1054−03: the nature of high redshift, near IR selected galaxies Principal Investigator: Marijn Franx Institution: Leiden Observatory Technical Contact: Marijn Franx, Leiden Observatory Co−Investigators: Pieter van Dokkum, Yale University Natascha Forster Schreiber, MPE− Garching Ivo Labbe, Leiden Observatory Greg Rudnick, MPA Garching Hans−Walter Rix, MPIA Heidelberg Paul van der Werf, Leiden Observatory Garth Illingworth, UC Santa Cruz Alan Moorwood, ESO Jiasheng Huang, Harvard Smithsonian Center for Astrophysics Mariska Kriek, Leiden Observatory Stijn Wuyts, Leiden Observatory Science Category: high−z galaxies (z>0.5) Observing Modes: IracMap Hours Approved: 7.2 Abstract: We have obtained deep very Js, H, Ks imaging with the VLT on several fields with excellent optical imaging, in order to study high redshift galaxies. Using these Near−IR images, we identified a class of galaxies with Js − Ks color larger than 2.3. Photometric redshifts and spectroscopic follow−up showed that their mean redshift is 2.5 +− 0.7. These galaxies are complementary to Lyman break selected galaxies: the overlap is minimal, and the rest−frame optical colors of the J−K selected galaxies are much redder. Their contribution to the stellar mass density is comparable to that of Lyman breaks in our fields. We propose to obtain images of these galaxies with IRAF on Spitzer from 3.6 to 8 micron, covering our field around the cluster MS1054−−03. This field is unique as it has the largest number of spectroscopically confirmed Js − Ks selected objects, and has several galaxies with rest frame optical spectroscopy. The Spitzer images will allow much improved photometric redshifts, SED modeling and mass estimates of these "red" galaxies, providing unique insight into their star formation history and evolutionary status. The deep Spitzer imaging will be one of the essential pieces to understand the link between these galaxies and "normal" Lyman break galaxies, and to obtain a comprehensive view of galaxy formation. Thursday March 25, 2010 xgal_covers.txt 128/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 257/742 Spitzer Space Telescope − General Observer Proposal #20147 Ultra−Deep MIPS−70 Imaging of GOODS CDF−S Principal Investigator: David Frayer Institution: SSC/Caltech Technical Contact: David Frayer, SSC/Caltech Co−Investigators: Ranga−Ram Chary, SSC Mark Dickinson, NOAO David Elbaz, CEA Dario Fadda, SSC Bahram Mobasher, STSCI Jason Surace, SSC Harry Teplitz, SSC Lin Yan, SSC Science Category: high−z galaxies (z>0.5) Observing Modes: MipsPhot Hours Approved: 34.5 Abstract: We propose ultra−deep MIPS 70um imaging of the GOODS Chandra Deep Field South (CDF−S). The goal of these observations is to determine the infrared properties of the highest redshift sources detectable by Spitzer with MIPS−70. In particular, we will derive source counts at the faintest possible depths and measure the infrared luminosity function out to z~1.5. We will also measure the 70um/24um flux density ratios to constrain what fraction of the infrared background arises from infrared−cool, starburst dominated luminous infrared galaxies versus infrared−warm AGN. Ultraluminous infrared galaxies contribute significantly to the total star−formation at high−redshift and are expected to be detected at flux levels near the confusion limit of the MIPS−70 band (~1−3 mJy). These observations are motivated by the GOODS philosophy of obtaining the deepest possible images from NASA’s Great Observatories (HST, Chandra, and Spitzer) and will greatly build upon our knowledge of the high−redshift universe. The observations of GOODS CDF−S will complement the GO−1 70um observations of GOODS HDF−N. Observations in the south will allow us to constrain the cosmic variance in the faint counts and will provide a list of southern high−z infrared luminous galaxies for follow−up studies with future telescopes, such as ALMA. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 258/742 Spitzer Space Telescope − General Observer Proposal #3325 Confusion−Limited 70um Imaging of the GOODS Hubble Deep Field North Principal Investigator: David Frayer Institution: SSC/Caltech Technical Contact: David Frayer, SSC/Caltech Co−Investigators: Ranga−Ram Chary, SSC Mark Dickinson, NOAO David Elbaz, CEA Saclay Dario Fadda, SSC David Henderson, SSC Bahram Mobasher, STSCI Jason Surace, SSC Harry Teplitz, SSC Lin Yan, SSC Science Category: high−z galaxies (z>0.5) Observing Modes: MipsPhot Hours Approved: 34.6 Abstract: We propose confusion−limited MIPS 70um imaging of the GOODS Hubble Deep Field North (HDF−N). The goal of these observations is to determine the infrared properties of the highest redshift sources detectable by the MIPS on Spitzer. In particular, we will derive source counts at the faintest possible depths and measure the infrared luminosity function out to z~1.5. We will also measure the 70um/24um flux density ratios to constrain what fraction of the infrared background arises from infrared−cool, starburst dominated luminous infrared galaxies versus infrared−warm AGN. Ultraluminous infrared galaxies contribute significantly to the total star−formation at high−redshift and are expected to be detected at flux levels near the confusion limit of the MIPS−70 band. Due to the much lower than expected in−flight performance of the 70um detectors and the loss of over half the array due to cabling issues, the planned observations of the HDF−N by the MIPS−GTO team will not reach the confusion level or the depth required to detect high−redshift sources at 70um. We propose to observe the HDF−N field to the ultimate depth at 70um. These observations are motivated by the GOODS philosophy of obtaining the deepest possible images from NASA’s Great Observatories (HST, Chandra, and Spitzer) and will greatly build upon our knowledge of the high−redshift universe by probing the far−infrared band to unprecedented depths. Thursday March 25, 2010 xgal_covers.txt 129/371
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Extragalactic abstracts - IRSA - California Institute of Technology

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