Extragalactic abstracts - IRSA - California Institute of Technology

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Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 495/742 Spitzer Space Telescope − General Observer Proposal #30314 Star formation in QSOs at the peak of cosmic quasar activity Principal Investigator: Dieter Lutz Institution: MPE Technical Contact: Dieter Lutz, MPE Co−Investigators: Eckhard Sturm, MPE Mario Schweitzer, MPE Elisabetta Valiante, MPE Paola Andreani, MPE Linda Tacconi, MPE Reinhard Genzel, MPE Hagai Netzer, Tel Aviv University Roberto Maiolino, INAF Arcetri Ohad Shemmer, Penn State University Sylvain Veilleux, University of Maryland Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare Hours Approved: 46.5 Abstract: Co−evolution of luminous AGN and powerful starbursts is a key aspect of galaxy evolution, indicated by the similar evolution with number densities peaking at z~2−3 for both quasars and submillimeter galaxies. It likely implies coexistence of significant accretion and star formation in the same objects, luminous high redshift quasars. While variously suspected from models and indirect arguments, this coexistence has not yet been reliably demonstrated due to the difficulty of detecting star formation tracers in the presence of the bright central AGN. We propose to use IRS spectroscopy of aromatic ’PAH’ emission features to investigate whether extremely powerful L ~ 10^13 LSun starbursts are indeed present in luminous radio−quiet QSOs near the z~2 peak of cosmic quasar activity. We will test the idea that the rest frame far−infrared/submm emission of these objects arises largely from star formation. Our targets all have robust mm or submm detections, maximizing chances for IRS detections. This study builds on our previous use of IRS, where we have demonstrated for submillimeter galaxies that PAH emission from L ~ 10^13 LSun star formation at z~2.5 is detectable with IRS, and shown for a sample of lower luminosity local PG QSOs that AGN activity and star formation are connected, the latter producing most of the far−infrared emission. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 496/742 Spitzer Space Telescope − General Observer Proposal #20493 A population of young starbursting QSOs at high redshift? Principal Investigator: Roberto Maiolino Institution: INAF Technical Contact: Roberto Maiolino, INAF Co−Investigators: Hagai Netzer, Tel Aviv University Ohad Shemmer, Pennsylvania State University Masatoshi Imanishi, National Astronomical Observatory of Japan Ernesto Oliva, INAF − Centro Galileo Galilei Science Category: AGN/quasars/radio galaxies Observing Modes: IrsStare Hours Approved: 8.3 Abstract: In low redshift QSOs the Narrow Line Region (NLR) tends to disappear at high luminosities. This effect has been interpreted as a consequence of the NLR size extending beyond the size of the host galaxy. At high redshift, many luminous QSOs are also characterized by the total absence of the NLR, in keeping with the findings at low redshift. However, we have also found a large population of QSOs, emerging at z>2, characterized by an extremely strong [OIII]5007 Narrow Line. The inferred densities of the Narrow Line Region in these peculiar QSOs are orders of magnitude higher than in "classical" NLRs of low redshift AGNs. A possible explanation is that the hosts of QSOs with strong [OIII] emission are experiencing powerful starburst activity and that the large amount of dense gas associated with the starburst enhances the [OIII] emissivity. If this interpretation is correct, then high−z QSOs with strong [OIII] are tracing episodes of vigorous star formation associated to the Black Hole accretion. We propose to test this scenario by means of IRS low resolution spectra of a sample of QSOs z>2 with strong [OIII] emission. We expect that such mid−IR spectra should reveal PAH features tracing the putative starburst activity (at variance with low−z and [OIII]−weak QSOs), and also enhanced mid−IR emission due to a larger covering factor of the dust associated with the dense clouds emitting [OIII]. We also include a control smaple of QSOs with weak/absent [OIII], at the same redshifts. Due to the overwhelming AGN light dominating at essentially all wavelengths, PAH emission features is probably the only tool to unambiguosly test the stabursting scenario for the [OIII]−luminous QSOs at z>2. Thursday March 25, 2010 xgal_covers.txt 248/371
Spitzer_Approved_Extragalactic Mar 25, 10 16:24 Page 497/742 Spitzer Space Telescope − Archive Research Proposal #3326 Far−IR Measurement of AGN and Starburst Activity in the First Look Survey Principal Investigator: Matthew Malkan Institution: UCLA Technical Contact: Matthew Malkan, UCLA Science Category: AGN/quasars/radio galaxies Dollars Approved: 59000.0 Abstract: The infrared fluxes of nearly every galaxy observed so far can be fitted with a combination of these D, B, and S components, which have an underlying physical basis: the strength of B gives a measure of the recent rate of star formation, while the strength of S (in those minority of galaxies where it is present) is associated with Seyfert activity. We will use the flux ratios of the sources detected in all three MIPS bands to quantify how much of their emission comes from a quiescent disk, a starburst, or a Seyfert nucleus. The MIPS color differences between the D, B and S SEDs are so large (about an order of magnitude difference in flux ratios), that high precision photometry is not even essential. Since the MIPS classification is somewhat z−dependent, we will use the IRAC and R−band photometry of our MIPS sources to sort them approximately by redshift. We will compare estimates of the luminosity functions of starburst power and accretion power from z of 0 to above 1 In the First Look Survey field, our galaxy evolution models predict that we will have over 600 sources with a 5$\\sigma$ or better detection in {\\it all} 3 MIPS bands. We have measured photometry of all the IRAC, MIPS and R−band sources within the early release field of FLS. These measurements of source counts, magnitudes and multiwavelength colors fully confirm the feasibility of our program. Spitzer_Approved_Extragalactic Printed_by_SSC Mar 25, 10 16:24 Page 498/742 Spitzer Space Telescope − General Observer Proposal #50253 IR Observations of a Complete Unbiased Sample of Bright Seyfert Galaxies Principal Investigator: Matthew Malkan Institution: UCLA Technical Contact: Matthew Malkan, UCLA Co−Investigators: Luigi Spinoglio, IFSI−INAF Howard Smith, Smithsonian Center for Astrophysics Silvia Tommasin, IFSI−INAF Vassilis Charmandaris, University of Crete George Bendo, Imperial College London Science Category: AGN/quasars/radio galaxies Observing Modes: IracMap IrsStare MipsPhot Hours Approved: 15.6 Abstract: IR spectra will measure the 2 main energy−generating processes by which galactic nuclei shine: black hole accretion and star formation. Both of these play roles in galaxy evolution, and they appear connected. To obtain a complete sample of AGN, covering the range of luminosities and column−densities, we will combine 2 complete all−sky samples with complementary selections, minimally biased by dust obscuration: the 116 IRAS 12um AGN and the 41 Swift/BAT hard Xray AGN. These galaxies have been extensively studied across the entire EM spectrum. Herschel observations have been requested and will be synergistic with the Spitzer database. IRAC and MIPS imaging will allow us to separate the nuclear and galactic continua. We are completing full IR observations of the local AGN population, most of which have already been done. The only remaining observations we request are 10 IRS/HIRES, 57 MIPS−24 and 30 IRAC pointings. These high−quality observations of bright AGN in the bolometric−flux−limited samples should be completed, for the high legacy value of complete uniform datasets. We will measure quantitatively the emission at each wavelength arising from stars and from accretion in each galactic center. Since our complete samples come from flux−limited all−sky surveys in the IR and HX, we will calculate the bi−variate AGN and star formation Luminosity Functions for the local population of active galaxies, for comparison with higher redshifts.Our second aim is to understand the physical differences between AGN classes. This requires statistical comparisons of full multiwavelength observations of complete representative samples. If the difference between Sy1s and Sy2s is caused by orientation, their isotropic properties, including those of the surrounding galactic centers, should be similar. In contrast, if they are different evolutionary stages following a galaxy encounter, then we may find observational evidence that the circumnuclear ISM of Sy2s is relatively younger. Thursday March 25, 2010 xgal_covers.txt 249/371
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Extragalactic abstracts - IRSA - California Institute of Technology

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