Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
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Spitzer_Approved_<strong>Extragalactic</strong><br />
Mar 25, 10 16:24 Page 245/742<br />
Spitzer Space Telescope − General Observer Proposal #41011<br />
MIPS 24 um Snapshot Survey <strong>of</strong> Massive Galaxy Clusters<br />
Principal Investigator: Eiichi Egami<br />
Institution: University <strong>of</strong> Arizona<br />
Technical Contact: Eiichi Egami, University <strong>of</strong> Arizona<br />
Co−Investigators:<br />
Graham Smith, University <strong>of</strong> Birmingham<br />
Jean−Paul Kneib, OAMP, Marseille<br />
Daniel Schaerer, Geneva Observatory<br />
Roser Pello, Obs−MIP, France<br />
Johan Richard, Caltech<br />
Dario Fadda, IPAC/Caltech<br />
Frederic Boone, Obs−PM, France<br />
Science Category: high−z galaxies (z>0.5)<br />
Observing Modes: MipsPhot<br />
Hours Approved: 22.3<br />
Abstract:<br />
Gravitatinoal lensing by massive clusters <strong>of</strong> galaxies <strong>of</strong>fers a very powerful and<br />
yet cheap means to improve the sensitivity <strong>of</strong> a given telescope/instrument<br />
combination. The use <strong>of</strong> gravitational lensing is especially powerful in the<br />
infrared wavelengths because cluster cores are dominated by early−type galaxies,<br />
which usually emit very little in the infrared. Therefore, infrared sources<br />
detected in cluster cores are almost always background sources. Here, we propose<br />
to conduct a MIPS 24 $\\mu$m snapshot survey <strong>of</strong> massive galaxy clusters with the<br />
goal <strong>of</strong> more <strong>of</strong> such stongly−lensed high−redshift galaxies. We will also study<br />
infrared−luminous brightest cluster galaxies (BCGs). This survey should be able<br />
to supply many interesting targets to follow up with SCUBA2, Herschel, and ALMA.<br />
Spitzer_Approved_<strong>Extragalactic</strong><br />
Printed_by_SSC<br />
Mar 25, 10 16:24 Page 246/742<br />
Spitzer Space Telescope − Directors Discretionary Time Proposal #280<br />
IRS Spectroscopy <strong>of</strong> a Typical Lyman Break Galaxy<br />
Principal Investigator: Richard Ellis<br />
Institution: Caltech<br />
Technical Contact: Brian Siana, Spitzer Science Center<br />
Co−Investigators:<br />
Johan Richard, Caltech<br />
Harry Teplitz, Caltech<br />
Ian Smail, Durham<br />
Jean−Paul Kneib, Caltech<br />
Mark Swinbank, Durham<br />
Alastair Edge, Durham<br />
Harald Ebeling, <strong>Institute</strong> for Astronomy<br />
Max Pettini, Cambridge<br />
Science Category: High−z Galaxies (z>0.5)<br />
Observing Modes: IracMap MipsPhot<br />
Hours Approved: 0.9<br />
Abstract:<br />
We request Director’s discretionary time on the Spitzer Space Telescope (SST) to<br />
determine the restframe mid−infrared spectral properties <strong>of</strong> a typical L* Lyman<br />
break galaxy (LBG) at z=3.07. Our proposed SST study <strong>of</strong> this galaxy requests a<br />
total <strong>of</strong> 11 hrs integration: 2 hrs with IRAC and MIPS at 24/70 microns to obtain<br />
photometry <strong>of</strong> the source at restframe wavelengths <strong>of</strong> 0.8−17 microns and 9 hrs<br />
exposure with IRS in LL1/SL1 to probe the 3−8 micron PAH and the shape <strong>of</strong> the<br />
continuum emission. This study is only feasible because <strong>of</strong> a 30x boost to the<br />
light−gathering power <strong>of</strong> Spitzer provided by a foreground gravitational lens −<br />
allowing us to use these observations to address questions which are drivers <strong>of</strong><br />
the James Webb Space Telescope (JWST) science case: yielding insights into the<br />
star formation properties <strong>of</strong> a normal, young galaxy seen 12 Gyrs ago.<br />
Thursday March 25, 2010 xgal_covers.txt<br />
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