New variable and multiple stars in the lower part of the Cepheid instability strip

Details New variable and multiple stars in the lower part of the Cepheid instability strip New variable and multiple stars in the lower part of the Cepheid instability strip

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005coast.146....6f&link_type=abstract

Communications in Asteroseismology, vol. 146, p. 6-10

Physics

3

Scientific paper

We obtained high-resolution spectra for 33 A-type stars during 4 consecutive nights. All our targets are Hipparcos program stars located in the lower part of the Cepheid instability strip which show hints for variability in radial velocity of a yet unidentified nature. CCD photometry was acquired for some of the most promising candidates and used to further interpret the variability of several targets. A first result is the discovery of two new pulsating variable stars. In addition, five new binary or multiple systems were identified (one SB1, three SB2 and one SB2 triple system).

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