Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249..622t&link_type=abstract
Astrophysical Journal, Part 1, vol. 249, Oct. 15, 1981, p. 622-627.
Astronomy and Astrophysics
Astronomy
31
Astronomical Spectroscopy, Infrared Spectra, Infrared Stars, Near Infrared Radiation, Nebulae, Astronomical Catalogs, Infrared Astronomy, Radio Sources (Astronomy), Spectral Resolution, Stellar Evolution, Stellar Luminosity
Scientific paper
New 1.4-2.4 micron moderate-resolution infrared spectra of NGC 2024 IRS 1 and IRS 2 have been obtained in an effort to determine the exciting source for NGC 2024. These spectra, combined with existing optical, infrared, and radio data, argue that neither IRS 1 nor IRS 2 is the exciting source. It is shown that the existing data point toward a single exciting star with a temperature of 34,000 K on the zero-age main sequence. A star of this type is consistent with the radio continuum flux, the infrared luminosity, and the He/H radio line ratio measurements. The most likely location of this star is in the southern mid- and far-infrared peaks which are located near the centroid of the radio emission.
Campbell B. G.
Thompson Rodger I.
Thronson Harley A. Jr.
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