High-angular-resolution observations of the OH masers in W51 (Main)

Journal Article · Sat Sep 01 04:00:00 EDT 1984 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113640· OSTI ID:6533451

Benson, J M; Mutel, R L; Gaume, R A

We have mapped the W51 ground-state OH masers using a VLBI array. The masers are clustered in two separate regions, one of which is coincident with an ultracompact H II region. Both maser clusters are nearly 3 x 10/sup 16/ cm in diameter. Two pairs of Zeeman split masers are identified in the 1720-MHz transition and indicate magnetic field strengths of 6 and 10 mG at two locations 500 AU apart in the compact H II region G49.5-0.4(e/sub 2/).

• Research Organization: National Radio Astronomy Observatory, Charlottesville, Virginia 22901
• OSTI ID: 6533451
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 89:9; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
CHEMISTRY
COSMIC RADIO SOURCES
COSMOCHEMISTRY
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
H2 REGIONS
HYDROXYL RADICALS
MAGNETIC FIELDS
MAPPING
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
RADIATIONS
RADICALS
RADIOWAVE RADIATION
ZEEMAN EFFECT