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Astron. Astrophys. 328, L37-L39

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Letter to the Editor

Is $\beta$ Crateris a Sirius-like system? *

R. Duemmler1, J. Pelt2, and H. Korhonen1, and I. Iliev3

1Astronomy Division, University of Oulu, P.O. Box 333, FIN-90571 Oulu, Finland
2Tartu Astrophysical Observatory, EE-2444 T$\tilde{\rm o}$ravere, Estonia
3National Astronomical Observatory, Rozhen, P.O. Box 136, BG-4700 Smoljan, Bulgaria

Received 23 September 1997 / Accepted 2 October 1997


New radial velocity (RV) measurements were obtained for the star $\beta$ Crt, which has been suspected to be a Sirius-like binary. Although a preliminary period analysis indicated a period as short as 8 days, no significant change of the RV over 8 nights could be detected. While this result is similar to what Smalley et al. (1997) found, our value of the mean RV is much smaller. We, therefore, conclude that the RV of $\beta$ Crt is indeed variable, maybe but not necessarily due to binarity, but so far no period can be determined.

Key words: stars: binaries - stars: binaries, spectroscopic - stars: individual: $\beta$ Crt

*Based on observations obtained at the 2.0m Ritchey-Chretien-Coudé Telescope of the National Astronomical Observatory, Rozhen, Bulgaria.

Send offprint requests to: R. Duemmler; Rudolf.Duemmler@Oulu.Fi

© European Southern Observatory (ESO) 1997

Online publication: November 24, 1997
Last change: March 26, 1998