Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87.1819l&link_type=abstract
Astronomical Journal, vol. 87, Dec. 1982, p. 1819-1827. Research supported by the Royal Observatory Edinburgh;
Astronomy and Astrophysics
Astronomy
52
Infrared Spectra, Molecular Clouds, Orion Constellation, Star Clusters, Stellar Evolution, Stellar Spectrophotometry, Color-Magnitude Diagram, High Resolution, Interstellar Extinction, Near Infrared Radiation, Spectral Resolution, Stellar Color, Stellar Magnitude, Stellar Mass, Visible Spectrum
Scientific paper
Near-infrared high-resolution scans (3.5 arcsec) of the core of the Orion Molecular Cloud (no. 1) have revealed 26 sources. Eleven of these are identified with faint visible stars. The remainder are thought to be highly reddened stars embedded in the molecular cloud and include at least two of the previously known infrared cluster members. Comparison of the distribution of infrared and visible stars on the plane of the sky and in an infrared color-magnitude diagram shows that the obscured infrared sources form a separate cluster of stars. The newly discovered sources appear to fall into two categories: (1) optically identified stars probably on the front surface of the cloud and associated with the Trapezium cluster; and (2) unidentified infrared stars probably associated with the molecular cloud and the embedded infrared cluster. It is plausible that the newly discovered infrared sources in the OMC-1 region are stars less massive than the previously known members and younger than visible stars of similar mass in Orion Association.
Becklin Eric E.
Lee Jessica T.
Lonsdale Colin J.
Stewart John M.
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