NGC 2024: Multi-wavelength infrared and radio observations

Details NGC 2024: Multi-wavelength infrared and radio observations NGC 2024: Multi-wavelength infrared and radio observations

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984abas.symp..164s&link_type=abstract

In NASA. Ames Research Center Airborne Astron. Symp. p 164-171 (SEE N85-17848 08-89)

Astronomy and Astrophysics

Astronomy

Astrography, Far Infrared Radiation, Maps, Optical Density, Radiant Flux Density, Wavelength Division Multiplexing, C-141 Aircraft, Infrared Astronomy, Infrared Spectroscopy, Luminous Intensity, Radiation Distribution, Stellar Luminosity, Wavelengths

Scientific paper

A series of far-infrared maps obtained on the KAO find the total IR luminosity of NGC 2024 is to the 4th power L, and show a peak in flux density and optical depth about 1' south of IRS 2. High resolution spectra of IRS 2 in Brackett alfa and Pfund gamma indicate the presence of an optically thick wind with M approx. 7 x 10 to the minus 7 power Myr to minus 1 power, from which we infer that IRS 2 is unable to supply the luminosity observed. A six centimeter continuum map peaks near the location of the far-infrared peak and confirms it as a likely site for a source to provide this luminosity. Maps in HCN, CS, and H2CO show the gas is dense in the direction of the far IR peak. Velocity analysis shows the H2 region created by the far IR source and IRS 2 forms an expanding bubble in front of which the H2CO is seen in absorption, and which is bounded in the south and behind by dense material.

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