Interactions between pre-main-sequence objects and molecular clouds. I - Elias 1-12

Details Interactions between pre-main-sequence objects and molecular clouds. I - Elias 1-12 Interactions between pre-main-sequence objects and molecular clouds. I - Elias 1-12

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265..855l&link_type=abstract

Astrophysical Journal, Part 1, vol. 265, Feb. 15, 1983, p. 855-863.

Astronomy and Astrophysics

Astrophysics

38

Carbon Monoxide, Molecular Clouds, Molecular Spectra, Stellar Envelopes, Stellar Mass Ejection, T Tauri Stars, Abundance, Gas Density, Gas Temperature, Interstellar Gas, Shock Heating, Spectral Energy Distribution, Spectral Line Width, Stellar Evolution, Stellar Spectra, Stellar Winds

Scientific paper

Elias 1-12 is a heavily obscured star in the IC5146 dark cloud. It was discovered during a 2 micron survey by Elias (1978). The photometric history of the star and its 2 micron spectrum led to a probable identification as only the fourth known FU Orionis star. The FU Orionis phenomenon consists of a T Tauri star undergoing an outburst of 5-6 mag. It was decided to include Elias 1-12 in a survey of CO emission-line profiles toward pre-main-sequence objects. In the present investigation, 'CO' refers to (C-12)(O16). On the basis of the obtained results, it is concluded that the FU Orionis star Elias 1-12 is surrounded by an area of perturbed molecular gas. This gas extends up to 0.3 pc from the star, has a total mass of 1.2 solar masses, and a kinetic temperature of 7-15 K. The observed characteristics can be explained on the basis of a stellar wind driven shell.

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