Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 443/742 Spitzer Space Telescope − Guaranteed Time Observer Proposal #30447 IRS spectroscopy of "type−3" quasars Principal Investigator: Giovanni Fazio Institution: Harvard−Smithsonian Astrophysical Observatory Technical Contact: Mark Lacy, Spitzer Science Center Co−Investigators: Mark Lacy, Spitzer Science Center Pauline Barmby, CfA Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare Hours Approved: 4.5 Abstract: We wish to obtain IRS spectra of a sample of objects which have the mid−infrared colors of AGN and mid−infared luminosities of quasars, but which lack AGN indicators in their optical spectra. Three of these objects have low−ionization optical spectra, and two lack emission lines but are most likely at z~1−2. We wish to investigate the possibility that these ‘‘type−3’’ quasars are an early phase in the development of AGN, perhaps hidden by a starburst triggered by the same merger event which triggered their AGN activity. Other possibilities include unusual starbursts with large amounts of warm dust, or otherwise normal AGN which lack a narrow line region. IRS spectra will allow us to distinguish between these different scenarios. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 444/742 Spitzer Space Telescope − Guaranteed Time Observer Proposal #40072 Spectral Energy Distributions of the High−Redshift 3CR Sources: Testing Unification Principal Investigator: Giovanni Fazio Institution: Smithsonian Astrophysical Observatory Technical Contact: Steven Willner, Smithsonian Astrophysical Observatory Co−Investigators: Martin Haas, Astronomisches Institut Universitat, Bochum, Germa Belinda Wilkes, Harvard−Smithsonian Center for Astrophysics Jiasheng Huang, Harvard−Smithsonian Center for Astrophysics Mark Lacy, Spitzer Science Center Daniel Stern, Jet Propulsion Lab Gillian Wilson, Spitzer Science Center Science Category: AGN/quasars/radio galaxies Observing Modes: IracMap IrsPeakupImage MipsPhot Hours Approved: 19.9 Abstract: We propose IRAC, IRS peakup, and MIPS photometry of a complete sample of high−redshift (z>1) radio galaxies and quasars. The sample contains 63 massive and powerful radio galaxies and quasars from the 3CR catalog, selected strictly on the basis of flux density of the radio lobes. It should therefore be an orientation−independent sample, suitable for testing AGN unification models. The observations will consist of photometry of the radio source counterpart galaxies from 3.6 to 24 microns. In addition, we will map an approximately 4 arcmin region around the radio galaxy with IRAC to look for possible clusters around the radio sources. The galaxy spectral energy distributions will enable us to determine the stellar luminosity and mass of the host galaxies and the mid−infrared luminosity of AGN−related power law emission. In addition, the IRAC images will allow us to study the environment of these most massive 3CR sources. The maps will be large enough to cover the presumed galaxy clusters and deep enough to detect galaxiesat least ten times fainter than the 3CR sources. Thursday March 25, 2010 xgal_covers.txt 222/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 445/742 Spitzer Space Telescope − Guaranteed Time Observer Proposal #40093 Spitzer Studies of High−Redshift Radio Galaxies Principal Investigator: Giovanni Fazio Institution: Smithsonian Astrophysical Observatory Technical Contact: Daniel Stern, Jet Propulsion Laboratory Co−Investigators: Daniel Stern, Jet Propulsion Laboratory Nick Seymour, Spitzer Science Center Carlos De Breuck, European Southern Observatory (Germany) Peter Eisenhardt, Jet Propulsion Laboratory Audrey Galametz, European Southern Observatory (Germany) Mark Lacy, Spitzer Science Center Joel Vernet, European Southern Observatory (Germany) Steve Willner, Center for Astrophysics Science Category: AGN/quasars/radio galaxies Observing Modes: IracMap IrsPeakupImage IrsStare MipsPhot Hours Approved: 19.7 Abstract: At every epoch, high−redshift radio galaxies (HzRGs) are associated with the most massive galaxies known, as evidenced by their tight observed−frame K−z relation which traces the bright envelope of field galaxies. Our Cycle 1 program entailed a comprehensive 3−camera Spitzer imaging survey of 70 HzRGs at 1
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Extragalactic abstracts - IRSA - California Institute of Technology

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