Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..907m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 15, 1988, p. 907-913.
Astronomy and Astrophysics
Astrophysics
18
Infrared Stars, Nebulae, Pre-Main Sequence Stars, Stellar Envelopes, Stellar Luminosity, Stellar Radiation, Carbon Monoxide, High Resolution, Millimeter Waves, Molecular Gases, Red Shift
Scientific paper
Observations at 2.1 arcsec resolution of 2.7 mm continuum emission toward GL 490 have resolved a 2600 x 1500 AU structure associated with the central infrared source. The continuum emission arises from 6-50 solar masses of gas and dust which probably represent the cool component of a massive circumstellar disk also responsible for both the mid- to far-infrared emission and the optical extinction. The average density in this gas is 10 to the 8th -10 to the 9th/cu cm making it the densest molecular gas yet detected. Emission in the C-13O line was detected from a high column density region within the molecular outflow and from a 0.2 x 0.07 pc region oriented at the same position angle as the continuum source. These latter features fit in nicely with the source model proposed by Kawabe et al. (1987).
Adelman Gabrielle A.
Mundy Lee G.
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