Measurement of magnetic field strength in the dark cloud Barnard 1

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/185401· OSTI ID:6068189

Goodman, A A; Crutcher, R M; Heiles, C; Myers, P C; Troland, T H

The detection of the Zeeman effect in OH emission in the dark cloud Barnard 1 is reported. The region of the OH emission in B1 extends over 1.1 pc, has 1.3 km/s linewidth, and has mean column density of 6 x 10 to the 21st/sq cm. The detected field strength, -27 + or - 4 micro-G, agrees well with two estimates of equilibrium field strength derived from the observations, and also with the evolutionary model of Mouschovias (1976, 1987). 31 references.

• Research Organization: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA); Illinois Univ., Urbana (USA); California Univ., Berkeley (USA); Kentucky Univ., Lexington (USA)
• OSTI ID: 6068189
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 338; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
DENSITY
FLUIDS
GASES
HYDROXYL RADICALS
INTERSTELLAR MAGNETIC FIELDS
INTERSTELLAR SPACE
MAGNETIC FIELDS
MAGNETIC FLUX
MASS
MOLECULES
NONLUMINOUS MATTER
PHYSICAL PROPERTIES
RADICALS
SPACE
STAR EVOLUTION
ZEEMAN EFFECT