Nonradial pulsation of the δ Scuti star BU Cancri in the Praesepe cluster

Multisite photoelectric photometry of the Delta Scuti star BU Cnc in the Praesepe cluster was obtained during 1989 February at five observatories on three continents. Five pulsation frequencies (19.76, 17.36, 16.69, 18.62, and 19.87 cycles/d) with millimag amplitudes were detected with a signal/nois...

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Veröffentlicht in:	Astronomy and astrophysics (Berlin) 1993-04, Vol.271 (2), p.482-486
Hauptverfasser:	BREGER, M, STICH, J, GARRIDO, R, MARTIN, B, JIANG SHI-YUANG, LI ZHI-PING, HUBE, D. P, OSTERMANN, W, PAPARO, M, SCHECK, M
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Earth, ocean, space Exact sciences and technology Stars Unusual and peculiar variables Variable and peculiar stars (including novae)
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Multisite photoelectric photometry of the Delta Scuti star BU Cnc in the Praesepe cluster was obtained during 1989 February at five observatories on three continents. Five pulsation frequencies (19.76, 17.36, 16.69, 18.62, and 19.87 cycles/d) with millimag amplitudes were detected with a signal/noise amplitude ratio of 4.0 or greater. An additional frequency at 23.91 cycles/d might also exist. The solution fits the observations to +/- 2.6 millimag. The pulsation modes can be identified with p3 +/-1 modes with at least two different values. Only up to two (l = 0) radial modes are possible.
ISSN:	0004-6361 1432-0746