Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 671/742 Spitzer Space Telescope − General Observer Proposal #3672 Spitzer Observations of a Complete Sample of Luminous Infrared Galaxies in the Local Universe Principal Investigator: Joseph Mazzarella Institution: California Instiute of Technology Technical Contact: Joseph Mazzarella, California Instiute of Technology Co−Investigators: Phil Appleton, Caltech , IPAC/SSC Lee Armus, Caltech, IPAC/SSC Aaron Evans, SUNY, Stony Brook David Frayer, Caltech, IPAC/SSC Catherine Ishida, Subaru Joseph Jensen, Gemini Sophia Khan, GSFC Dong−Chan Kim, University of Maryland Steven Lord, Caltech, IPAC/NHSC Barry Madore, OCIW & Caltech David Sanders, IfA, University of Hawaii Bernhard Schulz, IPAC, NHSC Jason Surace, Caltech, IPAC/SSC Sylvain Veilleux, University of Maryland Kevin Xu, Caltech, IPAC/GALAX Science Category: ULIRGS/LIRGS/HLIRGS Observing Modes: IracMap MipsPhot Hours Approved: 90.1 Abstract: We propose Spitzer Space Telescope observations of all ~200 luminous infrared galaxies (LIRGs, L_ir > 10^{11} L_sun) and ultraluminous infrared galaxies (ULIRGs, L_ir > 10^{12} L_sun) in the IRAS Revised Bright Galaxy Sample, a complete flux−limited survey of all extragalactic objects with total 60um flux density greater than 5.24 Jy, covering the entire sky surveyed by IRAS at Galactic latitudes abs(b) > 5 degrees. The superb sensitivity of Spitzer provides a unique opportunity to survey the physical properties of star formation and the interstellar medium in a large, statistically complete, flux−limited sample of nearby LIRGs and ULIRGs. IRAC and MIPS will be used to image the infrared emission in individual galaxies within interacting/merging systems that were not resolved by IRAS or ISO. Problems to be addressed include: 1) How do star formation rates and the spatial distribution of dust emitting regions vary with the stage of the interaction/merger, the mass ratio of the galaxies, the geometry of the encounter, and the properties of each galaxy known from optical, near−infrared, H I, CO, and radio continuum observations? 2) Which LIRGs most likely represent progenitors of ULIRGs and QSOs, and what characteristics of the galaxies and their merger geometries likely lead to dust heating dominated by AGNs rather than starbursts? 3) What are the relative amounts of cold (10 − 30 K), cool (30−50 K) and warm (T_d > 50 K) dust components in LIRGs and ULIRGs, and can this be used to age−date merger events? 4) Are there regions with very hot dust (600 − 1000 K) in some of these objects? This survey will also provide an important archive of data for establishing links between the global infrared properties of high redshift infrared/sub−mm galaxies and structural details that can be well resolved only in local LIRGs. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 672/742 Spitzer Space Telescope − General Observer Proposal #40682 IRS Observation of Four Exceptionally Red 24 micron Sources Principal Investigator: Sebastian Oliver Institution: University of Sussex Technical Contact: Sebastian Oliver, University of Sussex Co−Investigators: Matthew Thomson, University of Sussex Duncan Farrah, Cornell Carol Lonsdale, University of California, San Diego Mari Polletta, University of California, San Diego David Shupe, IPAC Jason Surace, IPAC Science Category: ULIRGS/LIRGS/HLIRGS Observing Modes: IrsMap Hours Approved: 10.1 Abstract: Four strong candidates for some of the most extreme objects observable with IRS have been identified using a technique for source extraction based on using the data from SWIRE 24 micron images taken at two epochs. These are highly reliable sources but which have no detection at IRAC wavebands. This suggests that they are the most extremely red sources. Our proposal is for an IRS observation of these four objects in order to apply various SED models to attempt to find the nature of these objects. Thursday March 25, 2010 xgal_covers.txt 336/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 673/742 Spitzer Space Telescope − General Observer Proposal #3640 IRS observations of ultraluminous ELAIS galaxies Principal Investigator: Ismael Perez−Fournon Institution: Instituto de Astrofisica de Canarias Technical Contact: Ismael Perez−Fournon, Inst. Astrofisica de Canarias Co−Investigators: Baltasar Vila−Vilaro, University of Arizona Michael Rowan−Robinson, Imperial College of Science, Technology and Med Dimitra Rigopoulou, Department of Astrophysics, Oxford University Duncan Farrah, Jet Propulsion Laboratory Sebastian Oliver, University of Sussex Francesca Pozzi, University of Sussex David Clements, Imperial College of Science, Technology and Medici Eduardo A. Gonzalez−Solares, Institute of Astronomy, U. of Cambridge Ivan Valtchanov, Imperial College of Science, Technology and Medici Fabio La Franca, Dipartimento di Fisica, Universita‘ degli Studi "R Steve Serjeant, University of Kent, Canterbury Mattia Vaccari, Imperial College of Science, Technology and Medici Thomas Babbedge, Imperial College of Science, Technology and Medici Carlotta Gruppioni, University of Bologna Carlo Lari, Istituto di Radioastronomia, Bologna Evanthia Hatziminaoglou, Instituto de Astrofisica de Canarias Antonio Hernan−Caballero, Instituto de Astrofisica de Canarias Francisco M. Montenegro Montes, Instituto de Astrofisica de Canarias Alejandro Afonso−Luis, Instituto de Astrofisica de Canarias Science Category: ULIRGS/LIRGS/HLIRGS Observing Modes: IrsStare Hours Approved: 65.9 Abstract: We propose to use the low spectral resolution capabilities of IRS to obtain high signal−to−noise mid−infrared spectra of a sample of 70 Ultra− and Hyperluminous extragalactic objects at high redshift discovered in the ELAIS survey. The European Large Area ISO Survey (ELAIS) offers the largest complete mid−IR, high−z, high−L extragalactic sample prior to SPITZER. At any redshift ELAIS provides the most luminous objects easily observable with IRS, being complete to about S (15 um) = 1 mJy, well−matched to the sensitivity of IRS. For this proposal we have selected all those galaxies and AGN which have redshift (determined either spectroscopically or photometrically) larger than one. The sample includes objects confirmed to be type−1 quasars with optical spectroscopy as well as galaxies, fainter in the optical, which are probably dusty luminous starbursts. From the IRS observations we plan to investigate in detail: a) the source of the high bolometric luminosities of the most luminous objects in the distant Universe and compare them with nearby galaxies of similar luminosities, b) the physics of dust and gas in high−redshift objects using well−established mid−infrared spectral diagnostic tools, c) the role of the high−luminosity objects in current models of galaxy formation, and d) the AGN−starburst connection. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 674/742 Spitzer Space Telescope − Directors Discretionary Time Proposal #288 The Evolution of Infrared−luminous Galaxies at High Redshift Principal Investigator: Alexandra Pope Institution: U. British Columbia Technical Contact: Alexandra Pope, U. British Columbia Science Category: ULIRGS/LIRGS/HLIRGS Observing Modes: IrsStare Hours Approved: 13.2 Abstract: My primary goal is to understand how different populations of infrared−luminous galaxies are related to each other, and how they all fit into our picture of galaxy evolution. This goal will be addressed using upcoming deep, wide−field Spitzer and SCUBA−2 extragalactic surveys, along with multi−wavelength imaging and spectroscopic data. I will use these datasets to constrain the shape of the IR SED to obtain accurate estimates of the star formation rates and dust properties. I will use IRS observations to characterize the mid−IR SED as a function of redshift, luminosity and sample selection to separate AGN and starburst components. Thursday March 25, 2010 xgal_covers.txt 337/371
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