Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.1805b&link_type=abstract
American Astronomical Society Meeting 205, #18.05; Bulletin of the American Astronomical Society, Vol. 36, p.1369
Astronomy and Astrophysics
Astronomy
Scientific paper
In February - March 2004, the WIRE satellite observed Lambda Sco and 57 Eri, two early B subgiant stars. Lambda Sco is a known β Cepheid and spectroscopic binary (Uytterhoeven et al. 2004), while 57 Eri has been previously reported only as a spectroscopic binary. The WIRE light curves, which are characterized by white noise levels more than an order of magnitude less than those obtained from ground-based sources, show clearly that both stars are multimodal β Cepheids. In this paper, we present data and preliminary analysis of the modal structure of the oscillations for both stars.
In addition, for each star we detect 3 eclipses, which have never before been seen in these (previously) spectroscopic binaries. We use data from the eclipses to refine fundamental orbital parameters for these systems.
Bruntt Hans
Buzasi Derek L.
Clausen Jens Viggo
Preston Heather L.
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