Journal Article

Search for rapid spectral feature variations in chemically peculiar star HR 4330

S. M. Sriraghavan and G. S. D. Babu

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 396, issue 4, pages 2061-2064
Published in print July 2009 | ISSN: 0035-8711
Published online July 2009 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13582.x
Search for rapid spectral feature variations in chemically peculiar star HR 4330

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The chemically peculiar star HR 4330 (=HD 96707, EP-UMa) was observed using the 2-m Himalayan Chandra Telescope at the Indian Astronomical Observatory, Hanle, India, for studying the variations in its spectral features. It was found that the spectral features of Ca ii 3933 Å and Sr ii 4077 Å were showing rapid variations in their equivalent widths with a periodicity of 0.28 ± 0.02 d. Such short-term variations suggest that there could be a dynamically active surface with rapid variation in the conditions of the stellar atmosphere.

Keywords: diffusion; stars: individual: HR 4330

Journal Article.  1629 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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