The Infrared Spectrum of P Cygni
نویسندگان
چکیده
منابع مشابه
Rapid Variations of Narrow Absorption Line Components in the Spectrum of P Cygni
We report the detection of rapid wavelength and intensity variations of narrow components in absorption line profiles of the hot galactic supergiant P Cygni. During most of the time, in one week of observations, there were two such components present. Although the period of observation is too short for firm conclusions, the velocity curves do not contradict the photometic period of 17.3 d. Thes...
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We present spectroscopy and discuss the photometric history of a previously obscure star in M31. The spectrum of the star is an extremely close match to that of P Cygni, one of the archetypes of Luminous Blue Variables (LBVs). The star has not shown much variability over the past 40 years (< 0.2 mag), although small-scale (0.05 mag) variations over a year appear to be real. Nevertheless, the pr...
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The blue super-giant PCygni has been observedwith the Grand Interféromètre à 2 Télescopes (GI2T). Using high spatial resolution data at low spectral resolution (R=3860) of Hα and HeI6678 emission lines we clearly resolve the extended enveloppe of this Luminous Blue Variable on August 1994. The angular diameter of the equivalent uniform disk taken over the total extent of these lines corresponds...
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Measurements by the University of California Berkeley Infrared Spatial Interferometer at 11.15 km have yielded strong evidence for multiple dust shells and/or signiÐcant asymmetric dust emission around NML Cyg. New observations reported also include multiple 8È13 km spectra taken from 1994È1995 and N-band (10.2 km) photometry from 1980È1992. These and past measurements are analyzed and Ðtted to...
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Measurements by the University of California Berkeley Infrared Spatial Interferome-ter at 11.15 m have yielded strong evidence for multiple dust shells and/or signiicant asymmetric dust emission around NML Cyg. New observations reported also include multiple 8-13 m spectra taken from 1994-1995 and N band (10.2 m) photometry from 1980-1992. These and past measurements are analyzed and tted to a ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1991
ISSN: 0074-1809
DOI: 10.1017/s0074180900045836