Observation of preplanetary disks around MWC 349 and LKH-alpha 101

Details Observation of preplanetary disks around MWC 349 and LKH-alpha 101 Observation of preplanetary disks around MWC 349 and LKH-alpha 101

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218..170t&link_type=abstract

Astrophysical Journal, Part 1, vol. 218, Nov. 15, 1977, p. 170-180.

Astronomy and Astrophysics

Astronomy

83

Infrared Astronomy, Planetary Nebulae, Stellar Envelopes, Stellar Spectra, Cosmic Dust, Emission Spectra, H Ii Regions, Interstellar Extinction, Stellar Evolution, Stellar Models

Scientific paper

Infrared spectra of three highly reddened emission-line objects (MWC 349, MWC 297, and LKH-alpha 101) have been obtained from both aircraft and ground-based observatories. These spectra show bright emission lines which are consistent with recombination in an H II region. Additional optical data for MWC 349 yield a model which consists of a central O6.5 star with circumstellar disk seen face-on, a surrounding H II region, and circumstellar dust. The parameters of the disk are discussed in terms of the viscous dissipation model of Lynden-Bell and Pringle (1974). The observations are in excellent agreement with the predictions of the model and represent the first substantial case for a newly formed star with a preplanetary disk.

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