Two wide-velocity H2O masers

Details Two wide-velocity H2O masers Two wide-velocity H2O masers

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227l..37f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 2, Jan. 1990, p. L37-L39.

Astronomy and Astrophysics

Astrophysics

3

Interstellar Masers, Star Formation, Water Masers, Early Stars, Stellar Mass, Stellar Spectra, Very Large Array (Vla)

Scientific paper

VLA observations are presented for two H2O maser sources with wide (greater than 50 km/s) velocity spread. In 351.78-0.54 the H2O masers form a ring, while in 0.54-0.85 they are located on a line. In both sources, maser spots with velocities near that of the ambient gas are spread over 3-4 in., while the red- and blue-shifted masers are more tightly grouped. The distribution and kinematics of the H2O masers in these sources suggest the presence of a disk or ring of material surrounding a massive young star in an early evolutionary phase.

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