VLBA Observations of G5.89-0.39: OH masers and magnetic field structure

Details VLBA Observations of G5.89-0.39: OH masers and magnetic field structure VLBA Observations of G5.89-0.39: OH masers and magnetic field structure

2006-10-05

arxiv.org/abs/astro-ph/0610137v1

Astrophys.J.656:943-951,2007

Astronomy and Astrophysics

Astrophysics

32 pages, 12 figures, accepted for publication in ApJ

Scientific paper

10.1086/509863

We present VLBA observations of 1667 MHz OH maser emission from the massive star formation region G5.89-0.39. The observations were phase referenced allowing the absolute positions of the masers to be obtained. The 1667 MHz masers have radial velocities that span ~50 km/s but show little evidence of tracing the bipolar molecular outflow, as has been claimed in previous studies. We identify 23 Zeeman pairs through comparison of masers in left and right circular polarization. Magnetic field strengths range from -2 mG to +2 mG, and an ordered reversal in magnetic field direction is observed toward the southern region of the UC HII region. We suggest that the velocity and magnetic field structure of the 1667 MHz masers can be explained in the context of a model in which the masers arise in a neutral shell just outside a rapidly exanding ionized shell.

Affiliated with

Also associated with

No associations

Rating

VLBA Observations of G5.89-0.39: OH masers and magnetic field structure 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 VLBA Observations of G5.89-0.39: OH masers and magnetic field structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLBA Observations of G5.89-0.39: OH masers and magnetic field structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-655420