A Magnetized Disk around an O Star in W75N. A VLBI Map of the OH Maser

Details A Magnetized Disk around an O Star in W75N. A VLBI Map of the OH Maser A Magnetized Disk around an O Star in W75N. A VLBI Map of the OH Maser

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45..942s&link_type=abstract

Astronomy Reports, Volume 45, Issue 12, December 2001, pp.942-948

Astronomy and Astrophysics

Astronomy

5

Scientific paper

W75N is a star-forming region containing ultracompact H II regions as well as OH, H2O, and methanol masers. The VLBA maps obtained show that the masers are located in a thin disk rotating around an O star, which is the exciting star for the ultracompact H II region VLA1. A separate group of maser spots is associated with the ultracompact H II region VLA2. The radial velocity of the maser spots varies across the disk from 3.7 to 10.9 km/s. The disk diameter is 4000 AU. The maser spots revolve in Keplerian orbits around the O9 star.

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