Astronomy and Astrophysics – Astronomy
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..763l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 15, 1988, p. 763-776. NSF-NASA-CONACYT-supported research.
Astronomy and Astrophysics
Astronomy
171
Hydrogen Atoms, Protostars, Radio Sources (Astronomy), Stellar Mass, Stellar Winds, Bipolarity, Carbon Monoxide, Centimeter Waves, Far Infrared Radiation, Formyl Ions
Scientific paper
Using the Arecibo radio telescope at the 21 cm line of atomic hydrogen, the authors detected a neutral atomic wind in the bipolar flow source HH 7-11. The H I gas reaches velocities up to ≡170 km s-1 and has an associated mass-loss rate from the protostar of ≡3×10-6M_sun;yr-1, which suffices to drive the observed CO bipolar flow. The 21 cm line profile indicates the H I wind to be decelerating. The deceleration of the atomic wind may arise from interaction with the surrounding molecular cloud. Evidence exists that ambient molecular material has been entrained in the decelerating H I wind.At the Nobeyama 45 m telescope the authors detected HCO+ at velocities intermediate between the H I wind and the CO bipolar outflow. The authors also discuss more ambiguous evidence in H I and in OH for a decelerating neutral stellar wind from L1551 IRS 5.
Hasegawa Takuya
Hayashi Saeko Suzuki
Heiles Carl
Koo Bon-Chul
Lizano Susana
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