Abstract
view Abstract Citations (218) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Interstellar bullets: H2O masers and Herbig-Haro objects. Norman, C. ; Silk, J. Abstract The paper considers the energy input to H2O masers in a dense molecular cloud and analyzes the response time scales for both collisional and radiative pump models. Specific mechanisms for magnetic energy input are given. The evolution of dense H2O maser clouds is studied in the environment of a young pre-main-sequence star that has developed an appreciable supersonic wind. It is shown that compact clouds can be ejected at high velocity to distances of order 1 pc. It is suggested that these clouds (referred to as interstellar bullets) might explain the phenomena of Herbig-Haro objects and high-velocity gas motions observed near compact infrared objects. Publication: The Astrophysical Journal Pub Date: February 1979 DOI: 10.1086/156836 Bibcode: 1979ApJ...228..197N Keywords: Herbig-Haro Objects; Hydrogen Clouds; Interstellar Matter; Main Sequence Stars; Stellar Evolution; Stellar Models; Water Masers; Cloud Physics; Collisional Plasmas; Cosmic Dust; Gas Dynamics; Infrared Astronomy; Magnetohydrodynamic Stability; Stellar Mass Ejection; Stellar Winds; Supersonic Flow; Astrophysics; Herbig-Haro Objects:Water Masers; Molecular Clouds:Water Masers; Water Masers:Models full text sources ADS |
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