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Proposal Identication No.: A1865 Date Received: 2004-Oct-01 15:40:31
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Galactic
Total Time Requested: 75 Hours
Proposal Title: Further Studies of the HI Zeeman Eect in the Galactic CNM
ABSTRACT:
We request 75 hours of additional telescope time to supplement our galactic HI absorption line survey. The existing
survey samples temperatures, column densities, turbulent line widths and magnetic elds in random regions of the
diuse HI gas. Very high sensitivity is needed to study the magnetic eld in the CNM via the HI Zeeman eect.
We have identied 5 sources for which additional integration time will yield very sensitive additional measurements
of the magnetic eld (1-sigma errors less than 2 microgauss). Inclusion of these new results with our existing HI
Zeeman eect data will signicantly enhance the statistical basis of our analysis of eld strengths in the CNM.
These new data will complete our Arecibo Millennium Survey of galactic HI absorption.
Name Institution E-mail Phone Student
T. H. Troland University of Ken-
tucky
troland@pa.uky.edu 859 257-8620 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
L-wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
1420 MHz
2