Other
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3129c&link_type=abstract
ATNF proposal C2331, Semester: April, 2010
Other
Interstellar Medium Of Other Galaxies, Surveys And Studies Of Distant Galaxies, Cosmology, Atca
Scientific paper
With the CABB in the 7-mm band, the ATCA is unique in being able to perform wide-band spectral scans for millimetre-wave molecular absorption along the sight-lines to distant quasars. Such scans may uncover a population of very distant molecular-rich galaxies, whose presence is responsible for the reddening of the background quasar light. To date, only five such systems are known, four of which were originally identified through redshifted millimetre-wave lines. Our finding that the red colour of the background quasars is correlated with the molecular fraction in the absorber can explain why previous optically selected surveys have been so unsuccessful. Through scans of the redshift space from z = 0 to the background quasar, we expect to find the object responsible for the reddening of the quasar light. These are too faint to yield redshifts from optical observations and wide-band decimetre scans are subject to severe interference. Not only can these observations uncover a population of extremely faint molecular-rich objects, but their redshifts will allow targetted searches for HI, OH, ammonia and other millimetre-band transitions, yielding the physical/chemical conditions and accurate measurements of the fundamental constants at large look-back times.
Curran Steve
Flambaum Victor V.
Webb John
Whiting Matthew
No associations
LandOfFree
A Pilot Survey for an Unknown Population of High Redshift Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Pilot Survey for an Unknown Population of High Redshift Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Pilot Survey for an Unknown Population of High Redshift Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1311760