Evidence for Zeeman splitting in 1720 MHz OH line emission (9)
Technical Report
·
OSTI ID:7354763
A number of 1720-MHz OH maser sources have relatively simple spectra consisting of doublets with opposite senses of circular polarization. Such doublets could be due to the Zeeman splitting of the /sup 2/Pi(3/2)F = 2 to 1 transition. A 3-station VLBI experiment was conducted to measure the spatial separation of the emitting regions of the components of opposite-sense polarization. The doublets in the 1720-MHz OH spectra of W3(OH), W51, NGC6334(N) and NGC7538(N) are found to be spatially coincident to within a linear dimension of about 100 AU, suggesting that they originate from the same region in space. This is taken to be strong evidence for identifying the doublets as Zeeman components. The magnetic field within the OH maser sources responsible for the observed splitting is typically a few times .001 gauss. (GRA)
- Research Organization:
- Owens Valley Radio Observatory, Pasadena, Calif. (USA)
- OSTI ID:
- 7354763
- Report Number(s):
- AD-A-011147
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evidence for Zeeman splitting in 1720-MHz on line emission
High-angular-resolution observations of the OH masers in W51 (Main)
Extended OH emission at 1720 MHz
Journal Article
·
Sun Dec 14 23:00:00 EST 1975
· Astrophys. J., v. 202, no. 3, pp. 650-654
·
OSTI ID:4056807
High-angular-resolution observations of the OH masers in W51 (Main)
Journal Article
·
Sat Sep 01 00:00:00 EDT 1984
· Astron. J.; (United States)
·
OSTI ID:6533451
Extended OH emission at 1720 MHz
Journal Article
·
Mon Oct 01 00:00:00 EDT 1973
· Astron. Astrophys., v. 28, no. 1, pp. 89-94
·
OSTI ID:4372809
Related Subjects
640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
CHEMISTRY
COSMIC RADIO SOURCES
COSMOCHEMISTRY
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
HYDROXYL RADICALS
INTERSTELLAR SPACE
MAGNETIC FIELDS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
POLARIZATION
RADICALS
SIZE
SPACE
SPECTRA
ZEEMAN EFFECT
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
CHEMISTRY
COSMIC RADIO SOURCES
COSMOCHEMISTRY
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
HYDROXYL RADICALS
INTERSTELLAR SPACE
MAGNETIC FIELDS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
POLARIZATION
RADICALS
SIZE
SPACE
SPECTRA
ZEEMAN EFFECT