Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239l..17s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 239, July 1, 1980, p. L17-L22.
Astronomy and Astrophysics
Astrophysics
474
Carbon Monoxide, Infrared Spectra, Interstellar Matter, Stellar Evolution, Stellar Structure, Stellar Winds, Emission Spectra, Herbig-Haro Objects, Kinetic Energy, Plasma Clouds, Shock Waves, Stellar Mass Ejection
Scientific paper
CO observations reveal the presence of a remarkable, double-lobed structure in the molecular cloud L1551. The two lobes extend for about 0.5 pc in opposite directions from an infrared source buried within the cloud; one lobe is associated with the Herbig-Haro objects HH28, HH29, and HH102. It is suggested that the CO emission in the double-lobed structure arises from a dense shell of material which has been swept up by a strong stellar wind from the infrared source. This wind has a velocity of 200 km/s, and evidently is channeled into two oppositely directed streams. The CO observations indicate that the shell has a velocity of 15 km/s, a mass of 0.3 solar masses and a kinetic temperature of 8-35 K. Its age is roughly 30,000 years. A stellar mass-loss rate of 8 x 10 to the -7th solar masses per yr would be sufficient to create such a shell.
Loren Robert B.
Plambeck Richard L.
Snell Ronald L.
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