Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 363/742 Spitzer Space Telescope − Guaranteed Time Observer Proposal #30328 DEEP IRAC and MIPS Imaging of an Overdensity Filament at z=3.09 Principal Investigator: Giovanni Fazio Institution: Harvard−Smithsonian Astrophysical Observatory Technical Contact: Jiasheng Huang, CfA Co−Investigators: Jiasheng Huang, SAO Steve Willner, SAO Matt Ashby, SAO Pauline Barmby, SAO Tracy Webb, University of McGill Dimitra Rigopoulou, Oxford University Toru Yamada, National Astronomical Obs. Japan Gillian Wilson, SSC Science Category: cosmology Observing Modes: IracMap MipsPhot Hours Approved: 32.0 Abstract: Galaxy clusters and protoclusters at high redshifts are very rare objects despite exhausive multi−wavelength searching in the sky. Objects of this kind bear rich information on formation of clusters and evolution of large scale structure. Simulations predict that clusters form in overdense regions in the universe; thus an overdense region is an ideal place to search for clusters. A overdense filament with a linear scale of 56Mpc at z=3.09 is found in the SSA22 region. This filament is traced by Lyman Alpha Emitters, Lyman Break Galaxies , Lyman Alpha Blobs. This region provides various types of galaxies at z=3.09, which may correspond to different stages in galaxy evolution in the dense environment. We propose both deep IRAC and MIPS 24micron imaging of this region. We will be able to analyze the stellar populations and obtain stellar mass for galaxies at different locations in the filament with the IRAC photometries, and also locate galaxies with strong star formation in the filament with the MIPS detection. This anlysis will reveal the formation process of galaxies in a dense environment like this filament. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 364/742 Spitzer Space Telescope − Guaranteed Time Observer Proposal #79 Proto−Clusters Around High−Redshift Radio Galaxies Principal Investigator: Giovanni Fazio Institution: Harvard−Smithsonian Astrophysical Observatory Technical Contact: Peter Eisenhardt, JPL Science Category: cosmology Observing Modes: IracMap IrsStare MipsPhot Hours Approved: 14.0 Abstract: High−redshift radio galaxies (HzRGs) provide our most robust examples of massive galaxies at early cosmic epoch. In biased galaxy formation models, we therefore expect associated galaxy overdensities around HzRGs. In this program we undertake deep IRAC, MIPS, and IRS observations of two distant radio galaxies, each of which once held the record for most distant galaxy known. These fields have also been subjected to deep optical (ground−based and Hubble) and sub−mm observations. We will attempt to identify possible galaxy proto−clusters surrounding these high−redshift AGN. Thursday March 25, 2010 xgal_covers.txt 182/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 365/742 Spitzer Space Telescope − General Observer Proposal #30871 Spitzer Observations of the Highest−Redshift Gamma−Ray Bursts Principal Investigator: Derek Fox Institution: Penn State University Technical Contact: Derek Fox, Penn State University Co−Investigators: E. Berger, Carnegie Observatories S. R. Kulkarni, California Insitute of Technology D. A. Frail, National Radio Astronomy Observatory B. P. Schmidt, Australia National University P. A. Price, University of Hawaii H.−S. Park, Lawrence Livermore National Laboratory A. Gal−Yam, California Institute of Technology A. Soderberg, California Institute of Technology S. B. Cenko, California Institute of Technology F. A. Harrison, California Institute of Technology S. Shectman, Carnegie Observatories E. Persson, Carnegie Observatories Science Category: cosmology Observing Modes: IracMap Hours Approved: 38.9 Abstract: We propose to use the Spitzer Space Telescope to study the infrared (3.6 to 8.0 micron) afterglow emission of GRBs from the ‘‘dark ages’’ of the universe, z>6. Current theories of the early universe predict the first star formation activity at z~20, and since GRBs are associated with the deaths of massive stars they may be expected at this epoch as well, before the formation of the first quasars. Our candidate high−redshift afterglows will be identified in ground−based near−infrared imaging as fading sources with red H−Ks color, H−Ks > 3.0 mag. For these bursts, 4−band IRAC imaging can provide the crucial additional color information that will distinguish afterglows at z>12.7 (H−band drop−outs) from those within high−extinction environments at z>6 (rest−frame E_(B−V)>0.8). We request time to carry out two high−impact Spitzer TOO campaigns during the cycle. The confirmation of even a single z>6 burst will have immediate implications for theories of the early universe, formation of the first nonlinear structures, the nature of the earliest stars, and cosmology. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 366/742 Spitzer Space Telescope − Legacy General Observer Proposal #50148 MIPS AGN and Galaxy Evolution Survey Principal Investigator: Buell Jannuzi Institution: National Optical Astronomy Observatory (NOAO) Technical Contact: Buell Jannuzi, NOAO Co−Investigators: Christopher Kochanek, Ohio State University Colin Borys, California Institute of Technology Daniel Eisenstein, University of Arizona Emeric Le Floc’h, University of Hawaii Ben Weiner, University of Arizona Lee Armus, California Institute of Technology Kate Brand, STScI Mark Brodwin, NOAO Michael Brown, Monash University Richard Cool, University of Arizona Vandana Desai, Spitzer Science Center Arjun Dey, NOAO Mark Dickinson, NOAO Herve Dole, Institut d’Astrophysique Spatiale Jane Morrison, University of Arizona Casey Papovich, University of Arizona Pablo Perez−Gonzalez, Universidad Complutense de Madrid George Rieke, University of Arizona Marcia Rieke, University of Arizona Daniel Stern, JPL/California Institute of Technology Idit Zehavi, Case Western Reserve University Science Category: cosmology Observing Modes: MipsScan Hours Approved: 129.5 Abstract: We propose a far−IR survey of the 9 square degree Bootes field of the NOAO Deep Wide−Field Survey (NDWFS) to 5−sigma flux limits of 0.2, 12.8 and 120 mJy to detect approximately 60000, 3000, and 400 sources at 24, 70 and 160 microns respectively. By combining observations at different roll angles, our maps will have excellent control of detector drifts, enabling precise fluctuation analyses in all three maps. In combination with the matching X−ray, UV, optical, near−IR, and mid−IR photometry, variability data, and the 22,000 spectroscopic redshifts for the field, we have three primary goals. First, we will survey the evolution of LIRGS/ULIRGS to redshifts of 0.6/1.3 at 24 microns and 0.4/0.8 at 70 microns. Over 500 0.6
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