SIMBAD references

2007ApJ...656..952F - Astrophys. J., 656, 952-958 (2007/February-3)

Large magnetic fields and motions of OH masers in W75N.

FISH V.L. and REID M.J.

Abstract (from CDS):

We report on a second epoch of VLBA observations of the 1665 and 1667 MHz OH masers in the massive star-forming region W75N. We find evidence to confirm the existence of very strong (∼40 mG) magnetic fields near source VLA 2. The masers near VLA 2 are dynamically distinct and include a very bright spot apparently moving at 50 km/s relative to those around VLA 1. This fast-moving spot may be an example of a rare class of OH masers seen in outflows in star-forming regions. Due to the variability of these masers and the rapidity of their motions, tracking these motions will require multiple observations over a significantly shorter time baseline than obtained here. Proper motions of the masers near VLA 1 are more suggestive of streaming along magnetized shocks rather than Keplerian rotation in a disk. The motions of the easternmost cluster of masers in W75N(B) may be tracing slow expansion around an unseen exciting source.

Abstract Copyright:

Journal keyword(s): ISM: Individual: Alphanumeric: W75N - ISM: Kinematics and Dynamics - Magnetic Fields - Masers - Radio Lines: ISM - Stars: Formation

Nomenclature: Table 1: [FR2007] NNN (Nos 1-123).

Simbad objects: 10

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