Emission-line stars in L 1641

Details Emission-line stars in L 1641 Emission-line stars in L 1641

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...265..144w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 1, p. 144-158.

Astronomy and Astrophysics

Astrophysics

7

Emission Spectra, H Alpha Line, Molecular Clouds, Pre-Main Sequence Stars, Star Formation, Stellar Spectrophotometry, Color-Magnitude Diagram, Interstellar Matter, Stellar Spectra

Scientific paper

We have searched for H-alpha emission-line stars in a one-square-degree area in the molecular cloud L 1641 located in the Orion South complex, and detected 112 stars with H-alpha strength between 1 (weak) and 4 (strong). In 87 of these stars, H-alpha emission has been detected for the first time. In L 1647 we found three candidate emission-line stars. Subsequently, we obtained spectra of 27 of the stars in L 1641 in the wavelength interval 5000-6700 A and derived spectral types and emission-line strengths. We compare the distribution and properties of emission-line stars in Orion with those in the Taurus dark clouds. Although a definite comparison is still hampered by selection effects, it seems clear that Orion is more efficient in low-mass star formation as well as massive star formation.

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