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Proposal Identication No.: A1709 Date Received: 2002-May-31 19:50:27
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 35 Hours
Proposal Title: Measuring the Magnetic Field in a Galaxy at z=0.09
ABSTRACT:
We propose to measure the line-of-sight component of the magnetic eld in the z = 0.0912 damped Lyman-alpha
absorption system on the B 0738+313 sightline, via Zeeman splitting of the redshifted 21cm absorption line. A
detection will allow us to dierentiate between two dierent possible mechanisms for the production of magnetic
elds in galaxies. The same observations serve a dual purpose, and can also be used to search for a redshifted HI
emission signal, with a mass limit of a few times 10 8 M . In order to make full use of the correlator capacity we
will also obtain a high sensitivity spectrum of a second 21cm absorber at z = 0:2212 on this sightline and search for
possible OH absorption at either redshift.
Name Institution E-mail Phone Student
Wendy Lane Naval Research Lab wendy.lane@nrl.navy.mil 202-404-1387 no
Service Observing Request Remot e Observing Request
None No
All of the observing run. X Maybe
X Part of the observing run. Yes
Queue Observing
Instrument Setup
L-wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1

1300-1304
1161-1165
1523-1530
This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz..
2