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A multiwavelength study of 170 micron selected sources Sajina, Anna
Abstract
We present results from sub-mm observations of sources selected from the ISO FIRBACK (Far IR BACKground) survey, along with UKIRT near-IR imaging of a sub-sample. This gives valuable insight to the brightest 10% of galaxies which contribute to the Cosmic Infrared Background (CIB). We estimate the photometric redshifts and luminosities of these sources by fitting their Spectral Energy Distributions (SEDs). The data appear to show a bimodal galaxy distribution, with normal star-forming galaxies at z ≃ 0, and the z ~ 0.4-0.9 tail of a much more luminous population. These are similar to the ultraluminous infrared galaxies which are found to evolve rapidly with redshift in other surveys. We are biased away from much higher redshift objects by the detectability threshold of FIRBACK. Nevertheless, the handful of z ~ 0.5 sources which we identify are likely to be the low-2 counterparts of the typically higher-2 sources found in blank field sub-mm observations. The sources we identify here have the virtue of being relatively easy to study in the optical. Hence their detailed investigation could help elucidate the nature of the sub-mm bright galaxies.
Item Metadata
Title |
A multiwavelength study of 170 micron selected sources
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2002
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Description |
We present results from sub-mm observations of sources selected from the ISO FIRBACK
(Far IR BACKground) survey, along with UKIRT near-IR imaging of a sub-sample. This
gives valuable insight to the brightest 10% of galaxies which contribute to the Cosmic
Infrared Background (CIB). We estimate the photometric redshifts and luminosities of
these sources by fitting their Spectral Energy Distributions (SEDs). The data appear
to show a bimodal galaxy distribution, with normal star-forming galaxies at z ≃ 0, and
the z ~ 0.4-0.9 tail of a much more luminous population. These are similar to the
ultraluminous infrared galaxies which are found to evolve rapidly with redshift in other
surveys. We are biased away from much higher redshift objects by the detectability
threshold of FIRBACK. Nevertheless, the handful of z ~ 0.5 sources which we identify
are likely to be the low-2 counterparts of the typically higher-2 sources found in blank field
sub-mm observations. The sources we identify here have the virtue of being relatively
easy to study in the optical. Hence their detailed investigation could help elucidate the
nature of the sub-mm bright galaxies.
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Extent |
4278804 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-09-30
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0085670
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2002-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.