Printed_by_SSC Mar 25, 10 16:24Spitzer_Approved_Extragalactic Page 1/742 Mar 25, 10 16:24Spitzer_Approved_Extragalactic Page 2/742 Spitzer Space Telescope − General Observer Proposal #3126 Spitzer Space Telescope − General Observer Proposal #50134 A Complete IRAC Map of M31 The Local Group Dwarf Spheroidals Principal Investigator: Pauline Barmby Principal Investigator: Pauline Barmby Institution: SAO Institution: SAO Technical Contact: Steven Willner, Center for Astrophysics Technical Contact: Pauline Barmby, SAO Co−Investigators: Co−Investigators: Steven Willner, SAO Joseph Hora, SAO Michael Pahre, SAO Karl Gordon, STScI Matthew Ashby, SAO Tom Jarrett, SSC John Huchra, SAO Matthew Ashby, SAO Robert Gehrz, University of Minnesota Elisha Polomski, University of Minnesota Science Category: local group galaxies Charles Woodward, University of Minnesota Observing Modes: IracMap MipsPhot MipsScan Roberta Humphreys, University of Minnesota Hours Approved: 30.0 Karl Gordon, University of Arizona Joannah Hinz, University of Arizona Abstract: Charles Engelbracht, University of Arizona We propose to complete the Spitzer survey of the Local Group. The galaxies not Pablo Perez−Gonzalez, University of Arizona yet observed include most of the dwarf spheroidals, a galaxy type which, George Rieke, University of Arizona although numerous, has not been heavily studied by Spitzer so far. Imaging Lucianna Bianchi, Johns Hopkins University observations with IRAC and MIPS will yield a complete census of asymptotic giant David Thilker, Johns Hopkins University branch stars, probing mass loss in galaxies with a range of metallicities, masses, and environments. Long−wavelength MIPS observations will detect any Science Category: local group galaxies insterstellar dust or constrain the gas−to−dust ratio. Completing the Spitzer Observing Modes: IracMap observations of Local Group galaxies forms an important part of the Spitzer Hours Approved: 35.5 Legacy for future missions. Abstract: We propose a complete IRAC map of M31, the Andromeda Galaxy. The mid−infrared window opened by Spitzer will provide a new view of the stellar populations and dust content of this nearest large galaxy and Milky Way analog. The spatial distribution of the aromatic infrared band (AIB) emission will be compared to the UV flux distribution as revealed by GALEX, contributing to the solution of several puzzles raised by ISO observations. The AIB emission will also be compared to other indicators of star formation, such as Halpha, far−IR, and radio emission, at the highest spatial resolution possible for a large external galaxy. Populations of unusual objects such as extremely luminous stars, supernova remnants, and planetary nebulae, have already been well−studied in M31; IRAC observations will serve to characterize these populations in the mid−IR and complete their spectral energy distributions. This program complements existing GTO and Legacy observations, and will provide a rich target list for follow−up observations. Thursday March 25, 2010 xgal_covers.txt 1/371 Printed_by_SSC Mar 25, 10 16:24Spitzer_Approved_Extragalactic Page 3/742 Mar 25, 10 16:24Spitzer_Approved_Extragalactic Page 4/742 Spitzer Space Telescope − General Observer Proposal #30491 Spitzer Space Telescope − General Observer Proposal #3316 A Complete Picture of the Dust in the Small Magellanic Cloud: Following up The Small Magellanic Cloud: A Template for the Primitive Interstellar Medium Spitzer Imaging with Spectroscopic Observations Principal Investigator: Alberto Bolatto Principal Investigator: Alberto Bolatto Institution: University of California at Berkeley Institution: University of California at Berkeley Technical Contact: Alberto Bolatto, University of California at Berkeley Technical Contact: Alberto Bolatto, University of California at Berkeley Co−Investigators: Co−Investigators: Snezana Stanimirovic, University of California at Berkeley Snezana Stanimirovic, U.C. Berkeley Frank Israel, Leiden Observatory Karin Sandstrom, U.C. Berkeley James Jackson, Boston University Joshua Simon, Caltech Adam Leroy, University of California at Berkeley J.D. Smith, U. of Arizona Aigen Li, University of Arizona James Ingalls, IPAC Ronak Shah, Boston University Bruce Draine, Princeton University Joshua Simon, University of California at Berkeley Aigen Li, University of Missouri−Columbia Lister Staveley−Smith, Australia Telescope/CSIRO Frank Israel, University of Leiden Francois Boulanger, Institute d’Astrophysique Spatiale Science Category: local group galaxies James Jackson, Boston University Observing Modes: IracMap MipsScan Jacco van Loon, Keele University Hours Approved: 48.8 Monica Rubio, Universidad Nacional de Chile Adam Leroy, U.C. Berkeley Abstract: Ronak Shah, Boston University The Small Magellanic Cloud constitutes an excellent laboratory to study the Caroline Bot, IPAC properties of the dust in a low metallicity environment. We propose to obtain images of the entire SMC in all IRAC and MIPS wavebands, a feat only possible Science Category: local group galaxies because of Spitzer’s unparalleled sensitivity. With these observations we will Observing Modes: IrsMap IrsStare quantify the distribution and properties of very small grains and PAHs Hours Approved: 105.6 throughout the SMC in relation to their environment. These data will allow us to constrain theoretical dust models, and provide information on the abundance, Abstract: distribution, ionization state, composition, and evolution of PAHs and VSGs. We request Spitzer Space Telescope time to obtain wide−field spectroscopic maps MIPS observations will probe the distribution of small and large dust grains, of several regions in the Small Magellanic Cloud. This survey is complementary and in combination with ground−based observations, will be used to provide an to the imaging information obtained by the Spitzer survey of the SMC (S3MC), and independent estimate of the amount of molecular gas in the SMC. Ultimately, this it is designed to sample a variety of environments. We will use these data to research will help constrain the properties of the ISM in primordial galaxies at unravel the life−cycle, distribution, abundance, and composition of PAHs and high redshifts. The SMC images will be publicly released within 6 months of the dust throughout the SMC, linking spectral variations to the measured IRAC/MIPS last observations, for the benefit of the entire astronomical community and to SEDs. IRS spectroscopy will allow us to relate variations in PAH and dust allow other groups to perform follow−up observations. chemistry and excitation (such as size, structure, hydrogenation, and ionization state) to the physical conditions and astrophysical processes present in the mapped regions. This study will provide strong constraints on theoretical dust models, in addition to producing information on the abundance, life cycle, and evolution of PAHs and VSGs. Ultimately, this research will help constrain the properties of the ISM in primordial galaxies at high redshifts.This project takes advantage of the uniquely new ability of Spitzer, which is capable of obtaining sensitive spectral maps covering large areas with a modest investment of time. Thursday March 25, 2010 xgal_covers.txt 2/371 Printed_by_SSC Mar 25, 10 16:24Spitzer_Approved_Extragalactic Page 5/742 Mar 25, 10 16:24Spitzer_Approved_Extragalactic Page 6/742 Spitzer Space Telescope − General Observer Proposal #3680 Spitzer Space Telescope − Archive Research Proposal #40568 Ejecta and Interstellar Dust in Magellanic Clouds Supernova Remnants Star Clusters in M31: Stellar Populations and Mass Loss Principal Investigator: Kazimierz Borkowski Principal Investigator: Jean Brodie Institution: North Carolina State University Institution: University of California, Santa Cruz Technical Contact: Kazimierz Borkowski, North Carolina State University Technical Contact: Jean Brodie, University of California, Santa Cruz Co−Investigators: Co−Investigators: William Blair, Johns Hopkins University Jay Strader, University of California, Santa Cruz Parviz Ghavamian, Johns Hopkins University Jacco van Loon, Keele University Sean Hendrick, North Carolina State University Knox Long, Space Science Telescope Institute Science Category: local group galaxies John Raymond, Harvard University Dollars Approved: 48294.0 Stephen Reynolds, North Carolina State University Ravi Sankrit, Johns Hopkins University Abstract: Chris Smith, National Optical Astronomy Observatory We propose an imaging study of massive star clusters in M31 using archival Frank Winkler, Middlebury College Spitzer imaging with IRAC and MIPS. We have two distinct goals: (1) Estimate cluster ages, metallicities, and reddenings through panchromatic FUV to mid−IR Science Category: local group galaxies imaging, and (2) Assess the production rate and lifetime of dust in the Observing Modes: IracMap MipsPhot intracluster medium (ICM) as a function of cluster properties. Our results will Hours Approved: 21.4 give important constraints on the star formation history of M31 and on mass loss in stellar clusters. Abstract: Stellar explosions govern the interstellar dust lifecycle. In the early Universe, supernovae (SN) injected the first heavy elements into the interstellar medium (ISM). A significant fraction of ejecta was dust. Dust is destroyed today in supernova remnant’s (SNR) blast waves. Our current understanding of both formation of dust in SNe and destruction of dust in blast waves is poorly understood. We propose to observe a complete sample of SNRs in Magellanic