Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339..163v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 339, April 1, 1989, p. 163-170.
Astronomy and Astrophysics
Astronomy
21
H I Regions, Milky Way Galaxy, Radio Sources (Astronomy), Zeeman Effect, Brightness Distribution, Emission Spectra, Interstellar Magnetic Fields, Orion Constellation, Polarized Radiation
Scientific paper
A new series of measurements of the Zeeman effect at 21 cm has been launched using the 140 foot (43 m) telescope of the NRAO. The observations of high-latitude sources reveal tremendous improvement in sensitivity over measurements done in previous era. The detection of a field of + 5.5 micro G in the direction of the North Polar Spur, in the H I equivalent of CO cloud 40 of Magnani, Blitz, and Mundy, is reported. Field limits as low as a few microgauss were set in the direction of two very cold H I clouds after only 4 hr of integration. The detection of a field of the order of 7 micro G in one of the expanding H I shells observed by Troland and Heiles is confirmed, and the field varies significantly on a scale of 20 arcmin (0.6 pc at the shell). The detection of a field in the direction of the Orion region by Heiles and Troland is confirmed in one direction but not in another.
No associations
LandOfFree
Measurements of the 21 centimeter Zeeman effect in high-latitude directions 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 Measurements of the 21 centimeter Zeeman effect in high-latitude directions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurements of the 21 centimeter Zeeman effect in high-latitude directions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1735460