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Issue A&A
Volume 371, Number 3, June I 2001
Page(s) 1048 - 1055
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20010432



A&A 371, 1048-1055 (2001)
DOI: 10.1051/0004-6361:20010432

The Naini Tal -Cape survey for pulsations in chemically peculiar A-type stars

I. Methods and preliminary results
P. Martinez1, D. W. Kurtz2, 3, B. N. Ashoka4, U. S. Chaubey5, V. Girish4, S. K. Gupta5, S. Joshi5, K. Kasturirangan4, R. Sagar5 and S. Seetha4

1  South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa
2  Department of Astronomy, University of Cape Town, Rondebosch 7701, South Africa
3  Centre for Astrophysics, University of Central Lancashire, Preston PR1 2HE, UK
4  Uttar Pradesh State Observatory, Manora Peak -263 129, Naini Tal, India
5  ISRO Satellite Centre, Airport Road, Bangalore 560 034, India

(Received 22 February 2001 / Accepted 22 March 2001 )

Abstract
A new survey for pulsating, chemically peculiar A- and F-type stars in the northern hemisphere has been initiated using the 1-m telescope at Uttar Pradesh State Observatory in Naini Tal. The survey is primarily structured to reveal high-overtone pulsations in chemically peculiar A-F stars, but it is also revealing low-overtone $\delta$ Scuti-type pulsations in stars with peculiar colours. This paper describes the scope and methods of the survey. Preliminary observations of 28 candidate stars are presented and the discovery of three new pulsators, HD 12098, HD 13038 and HD 13079, is announced. Null results for the remaining 25 stars are also discussed.


Key words: stars: chemically peculiar -- stars: individual: HD 12098, HD 13038, HD 13079 -- stars: oscillations -- stars: variables: $\delta$ Scuti

Offprint request: P. Martinez, peter@saao.ac.za

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