Distribution of dust about Omicron Ceti and Alpha Orionis based on 11 micron spatial interferometry

Abstract

view Abstract Citations (51) References (33) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Distribution of Dust about O Ceti and alpha Orionis Based on 11 Micron Spatial Interferometry Bester, M. ; Danchi, W. C. ; Degiacomi, C. G. ; Townes, C. H. ; Geballe, T. R. Abstract Visibilities of Omicron Ceti and Alpha Orionis have been measured at a wavelength of 11 microns by a two-element heterodyne interferometer with maximum baseline spacings of 4 and 13 m. The measurements show that dust extends to within about 3 stellar radii of the oxygen-rich star Omicron Ceti, the temperature there being near 1200 K. While the majority of dust near Alpha Orionis is in a shell of inner radius 0.90 arcsec, where the temperature is about 300 K, a region very near the star producing 11 microns radiation appears to be present. This may be represented as a stellar envelope of diameter 0.063 arcsec which is not transparent at 11 microns wavelengths. Publication: The Astrophysical Journal Pub Date: January 1991 DOI: 10.1086/185924 Bibcode: 1991ApJ...367L..27B Keywords: Astronomical Models; Astronomical Spectroscopy; Cosmic Dust; Interferometry; Omicron Ceti Star; Infrared Spectra; Power Spectra; Stellar Luminosity; Stellar Mass Ejection; Stellar Structure; Astrophysics; INFRARED: SOURCES; INTERFEROMETRY; STARS: CIRCUMSTELLAR SHELLS; STARS: DIAMETERS; STARS: INDIVIDUAL CONSTELLATION NAME: O CETI; STARS: INDIVIDUAL CONSTELLATION NAME: ALPHA ORIONIS; STARS: MASS LOSS full text sources ADS | data products SIMBAD (2)