Interstellar bullets - H2O masers and Herbig-Haro objects

Details Interstellar bullets - H2O masers and Herbig-Haro objects Interstellar bullets - H2O masers and Herbig-Haro objects

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..197n&link_type=abstract

Astrophysical Journal, Part 1, vol. 228, Feb. 15, 1979, p. 197-205. Research supported by the University of California

Astronomy and Astrophysics

Astronomy

195

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

Scientific paper

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.

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