Publications of the Astronomical Society of the Pacific · 1976 · 43 citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsInfrared AstronomyStellar AstronomyInfrared PhotometryInterstellar DustStar CatalogsStellar PhotometryStellar SpectroscopyYoung Stellar ObjectsAll-sky Infrared SurveysCircumstellar Dust EmissionCircumstellar Dust ShellsInfrared Stellar SpectroscopyOptical DepthOptical Penetration DepthSky Survey AnalysisSurface Temperature
Broad-band infrared photometry and spectrophotometry with resolution 4A --0.015 over the wavelength range 2- is presented for a large number of 2 m Sky Suwey objects. All of these sources within the present sample except IRC +40091 (Lk Ha 101) are shown to have characteristics similar to stars of the conventional spectral sequence or perhaps a slight extension to cooler surface temperature. A progression of increasing optical depth of circumstellar dust surrounding the stars is demonstrated. No evidence for a cool stellar photosphere is observed for IRC +40091. Key words: infrared objects - infrared spectrophotometry - circumstellar dust