Extragalactic abstracts - IRSA - California Institute of Technology

Spitzer_Approved_Extragalactic
Mar 25, 10 16:24 Page 257/742
Spitzer Space Telescope − General Observer Proposal #20147
Ultra−Deep MIPS−70 Imaging of GOODS CDF−S
Principal Investigator: David Frayer
Institution: SSC/Caltech
Technical Contact: David Frayer, SSC/Caltech
Co−Investigators:
Ranga−Ram Chary, SSC
Mark Dickinson, NOAO
David Elbaz, CEA
Dario Fadda, SSC
Bahram Mobasher, STSCI
Jason Surace, SSC
Harry Teplitz, SSC
Lin Yan, SSC
Science Category: high−z galaxies (z>0.5)
Observing Modes: MipsPhot
Hours Approved: 34.5
Abstract:
We propose ultra−deep MIPS 70um imaging of the GOODS Chandra Deep Field South
(CDF−S). The goal of these observations is to determine the infrared properties
of the highest redshift sources detectable by Spitzer with MIPS−70. In
particular, we will derive source counts at the faintest possible depths and
measure the infrared luminosity function out to z~1.5. We will also measure the
70um/24um flux density ratios to constrain what fraction of the infrared
background arises from infrared−cool, starburst dominated luminous infrared
galaxies versus infrared−warm AGN. Ultraluminous infrared galaxies contribute
significantly to the total star−formation at high−redshift and are expected to
be detected at flux levels near the confusion limit of the MIPS−70 band (~1−3
mJy). These observations are motivated by the GOODS philosophy of obtaining the
deepest possible images from NASA’s Great Observatories (HST, Chandra, and
Spitzer) and will greatly build upon our knowledge of the high−redshift
universe. The observations of GOODS CDF−S will complement the GO−1 70um
observations of GOODS HDF−N. Observations in the south will allow us to
constrain the cosmic variance in the faint counts and will provide a list of
southern high−z infrared luminous galaxies for follow−up studies with future
telescopes, such as ALMA.
Spitzer_Approved_Extragalactic
Printed_by_SSC
Mar 25, 10 16:24 Page 258/742
Spitzer Space Telescope − General Observer Proposal #3325
Confusion−Limited 70um Imaging of the GOODS Hubble Deep Field North
Principal Investigator: David Frayer
Institution: SSC/Caltech
Technical Contact: David Frayer, SSC/Caltech
Co−Investigators:
Ranga−Ram Chary, SSC
Mark Dickinson, NOAO
David Elbaz, CEA Saclay
Dario Fadda, SSC
David Henderson, SSC
Bahram Mobasher, STSCI
Jason Surace, SSC
Harry Teplitz, SSC
Lin Yan, SSC
Science Category: high−z galaxies (z>0.5)
Observing Modes: MipsPhot
Hours Approved: 34.6
Abstract:
We propose confusion−limited MIPS 70um imaging of the GOODS Hubble Deep Field
North (HDF−N). The goal of these observations is to determine the infrared
properties of the highest redshift sources detectable by the MIPS on Spitzer.
In particular, we will derive source counts at the faintest possible depths and
measure the infrared luminosity function out to z~1.5. We will also measure the
70um/24um flux density ratios to constrain what fraction of the infrared
background arises from infrared−cool, starburst dominated luminous infrared
galaxies versus infrared−warm AGN. Ultraluminous infrared galaxies contribute
significantly to the total star−formation at high−redshift and are expected to
be detected at flux levels near the confusion limit of the MIPS−70 band. Due to
the much lower than expected in−flight performance of the 70um detectors and the
loss of over half the array due to cabling issues, the planned observations of
the HDF−N by the MIPS−GTO team will not reach the confusion level or the depth
required to detect high−redshift sources at 70um. We propose to observe the
HDF−N field to the ultimate depth at 70um. These observations are motivated by
the GOODS philosophy of obtaining the deepest possible images from NASA’s Great
Observatories (HST, Chandra, and Spitzer) and will greatly build upon our
knowledge of the high−redshift universe by probing the far−infrared band to
unprecedented depths.
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