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Title: Spectral Line Variations in the Ap Star HD 42536
Authors: Babu, G. S. D
Jayakumar, K
Velu, C
Sujatha, S
Keywords: Ap star;Spectral lines;Variations
Issue Date: 2003
Publisher: Astronomical Society of India
Citation: BASI, Vol. 31, No. 3&4, pp. 337 - 339
Abstract: The Sr-Cr type chemically peculiar star HD 42536 (= HR 2195) was observed with the 2.34 meter Vainu Bappu Telescope. Kavalur during the period of November 1998 to April 1999. A total of 46 spectrograms were obtained in the wavelength region of 3900 Å to 4300 Å at a linear dispersion of 0.65 Å per pixel. The equivalent widths of Sr (4077) and Cr (4172) have been found to be varying with a period of 0.58 ± 0.02 day, the amplitudes being about 100 mÅ and 60 mÅ respectively. This period is a resonance value of the peroid given by Manfroid and Mathys (1985).
Appears in Collections:BASI Publications

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