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A1629 2002-Feb-01 21:42:46
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 24 Hours
Proposal Title: A mini-survey for CO Emission at redshifts greater than 10
ABSTRACT:
An exploratory program will place limits on faint spectral signals from the radio sky at 3 cm wavelength, which is a
frequency band corresponding to the CO (1-0) transition at redshift approximately 11 (and higher redshifts in the
higher CO rotational level transitions). The signal could result from (1) the spatial correlation of the rst collapsing
mini-halos on size scales that eventually become large scale structure at z=0, or (2) groupings of collapsed
structures in the non-linear regime, as protogalaxies rst ignite. Some popular scenarios have a wide-spread,
base-level of metal enrichment already in place as a result of Pop III stars at redshifts 20-30 to provide the
necessary ingredients for CO molecules. The observations will scan a survey strip on several days using a series of
Peak-Park-n-Drift cycles, in order to remove the need for detailed pointing models and provide high spectral
baseline stability.
Name Institution E-mail Phone Student
Frank H Briggs Kapteyn Institute fbriggs@astro.rug.nl 31-50-3634073 no
Service Observing Request Remot e Observing Request
X None No
All of the observing run. X Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
X-high
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1

9500 - 9700
2