Near-infrared speckle interferometry of evolved stars and bipolar nebulae

Abstract

view Abstract Citations (116) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Near-infrared speckle interferometry of evolved stars and bipolar nebulae. Dyck, H. M. ; Zuckerman, B. ; Leinert, Ch. ; Beckwith, S. Abstract Near-infrared visibility functions are presented for 16 late-type giants and supergiants and bipolar nebulae. The observational sample consists primarily of OH/IR stars and carbon stars with millimeter wave CO emission. The results are discussed in terms of currently available circumstellar envelope models and in relationship to radio observations. It is found that many infrared-bright stars with dense circumstellar dust envelopes are at least partially resolvable from the ground by speckle interferometry. If the near-infrared diameters are interpreted as the inner boundary for dust in the envelope, this boundary has a radius of order 10 to the 15th cm. The envelope diameters show a systematic increase with wavelength, carbon stars appearing to have a shallower increase than oxygen stars. There is a systematic increase of the apparent angular diameter of the dust envelope with increasing mass loss rate. Publication: The Astrophysical Journal Pub Date: December 1984 DOI: 10.1086/162739 Bibcode: 1984ApJ...287..801D Keywords: Infrared Stars; Interferometry; Late Stars; Near Infrared Radiation; Nebulae; Stellar Evolution; Giant Stars; Infrared Interferometers; Speckle Patterns; Spectral Resolution; Stellar Mass Ejection; Supergiant Stars; Visibility; Astrophysics full text sources ADS | data products SIMBAD (11)