view Abstract Citations (53) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The extreme high-velocity H2O maser features in W49N, W51, and Sagittarius B2. Morris, M. Abstract Extreme high-velocity 1.3 cm emission features of water vapor were found and studied in W49N, W5 1, and Sgr B2, extending the total ranges covered by H2O emission in these objects to 530, 180, and 150 km 5 ', respectively. Variations in the extreme high-velocity emission in W49N were monitored over a 9 month interval. Also, a spatial map of the maser sources in Sgr B2 has been made. Various models for the W49N maser source are examined in the light of the new observations, and it is concluded that the most plausible hypothesis is that an intense stellar wind from an 0 star has accelerated the maser clouds to their observed velocities. The W51 maser source appears to be physically similar to W49N. Sgr B2, on the other hand, appears to be a different type of maser source. We advance the hypothesis that it is a bound cluster of discrete protostellar condensations. Subject headings: infrared: sources - interstellar: molecules - masers - radio sources: spectra - stars: formation Publication: The Astrophysical Journal Pub Date: November 1976 DOI: 10.1086/154806 Bibcode: 1976ApJ...210..100M Keywords: Emission Spectra; Infrared Astronomy; Interstellar Masers; Radial Velocity; Stellar Evolution; Water Masers; Gravitational Fields; Milky Way Galaxy; Molecular Spectra; O Stars; Radiant Flux Density; Radiation Pressure; Stellar Winds; Water Vapor; Astrophysics full text sources ADS |