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Title: Search for rapid spectral variability in Psi(9) Aurigae
Authors: Ghosh, K. K
Keywords: B Stars;Stellar Atmospheres;Stellar Spectra;Variable Stars;Error Analysis;H Alpha Line;Nocturnal Variations;Normal Density Functions
Issue Date: Sep-1989
Publisher: Astronomical Society of the Pacific
Citation: Publications Astronomical Society of the Pacific, Vol. 101, pp. 839 - 843
Abstract: Observations of Psi(9) Aur on five nights between January 29 and February 3, 1988 were conducted as part of a search for rapid spectral variability in Be stars. In addition, a series of H-alpha profiles with a time resolution of about 45 s was obtained for the star. A method for obtaining the standard deviation in continuum counts measurements is proposed. The estimated value of the standard deviation of the measured equivalent widths of the H-alpha profiles was obtained using the method of Chalabaev and Maillard (1983). Rapid variations of the standard deviations of continuum counts and H-alpha equivalent widths were not observed. For the continuum counts measurement standard deviations a few hourly variations and two night-to-night variations were found.
ISSN: 0004-6280
Appears in Collections:IIAP Publications

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