Optical, infrared, and radio studies of AFCRL sources

Details Optical, infrared, and radio studies of AFCRL sources Optical, infrared, and radio studies of AFCRL sources

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217..108a&link_type=abstract

Astrophysical Journal, Part 1, vol. 217, Oct. 1, 1977, p. 108-111, 113-126.

Astronomy and Astrophysics

Astronomy

109

Hydroxyl Emission, Infrared Astronomy, Infrared Spectrophotometers, Optical Emission Spectroscopy, Astronomical Catalogs, Carbon Stars, Emission Spectra, M Stars, Nebulae, Point Sources, Radiant Flux Density, Sky Surveys (Astronomy), Spatial Distribution, Stellar Spectra, Tables (Data), Wolf-Rayet Stars

Scientific paper

The southern point sources in the AFCRL infrared (4, 11, and 20 microns) sky survey have been studied at infrared, optical, and radio wavelengths. Searches were performed at 2.2 microns to locate the sources, near-infrared photometry of them was secured, and classification spectra of those with optical counterparts were obtained. OH observations have yielded 14 new Type II OH/IR sources and suggest a correlation between the OH flux densities and the infrared colors. Most of the AFCRL sources are carbon or late M stars similar to the reddest objects in the IRC but extending to even redder color indices. In addition, two emission nebulae are found along with two WC stars, five Be stars, and three sources lying in or near reflection nebulae. The confirmed sources lie preferentially within a few degrees of the galactic plane, and the carbon stars show a galactic-longitude distribution different from that of the remainder. Many of the sources probably vary at infrared wavelengths.

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