Other
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245p..24r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 245, July 15, 1990, p. 24P-27P.
Other
34
Carbon Monoxide, Early Stars, Interstellar Matter, Molecular Clouds, Molecular Flow, Stellar Mass, H Ii Regions, Interstellar Extinction, Molecular Gases, Stellar Luminosity, Water Masers
Scientific paper
The discovery is reported of a bipolar outflow source in the NGC 2024 cloud core, which appears to be associated with both the 1300-micron continuum source FIR6 and a water maser. This flow is compact (about 0.05 pc), displays bright wide line-wings (total width about 125 km/s) and has a mechanical luminosity L(CO) = about 15 solar luminosities. These properties suggest that FIR6 is a young stellar object of high mass: from the correlation of mechanical luminosity with bolometric luminosity, the source luminosity is greater than about 10 exp 3.5 solar luminosities. The short dynamical timescale of this flow (about 400 yr) suggests that the system is very young, but the high inferred luminosity implies that the object has evolved beyond the stage of isothermal protostellar contraction. The lack of a 2-micron source coincident with FIR6 can be explained by very high extinction to the luminous core.
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