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Proposal Identication No.: A1225 Date Received: 1998-Nov- 1 21:10:56
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 200 Hours
Proposal Title: Deep HI: nature of Lyman alpha forest, diuse galaxy halos, evolution of the
Universe's HI content to z=0.23
ABSTRACT:
Arecibo is the only radio telescope that is likely to detect emission from the ionizied Lyman alpha forest clouds
that must be present in the nearby universe. Very deep integrations on both selected and pseudo-randomly chosen
sight lines will simultaneously seek local examples of Ly-forest clouds, emission from galaxies associated with
clouds, emission from diuse galaxy halos, and measurement of the HI content of "HI-selected galaxies" to z=0.23.
Name Institution E-mail Phone Student
Frank H Briggs Kapteyn Institute fbriggs@astro.rug.nl +31-50-
3634073
N
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
L-band
Atmospheric Observation Instruments:
Description of Observer Equipment:
Special Equipment or setup: Special setup: Software needs: Media needs:
RFI Considerations
1

Frequency Ranges Planned
see proposal
2