The field high-amplitude SX Phoenicis variable BL camelopardalis: Results from a multisite photometric campaign I. Pulsation
- Rodríguez E.
- Fauvaud S.
- Farrell J.A.
- Zhou A.-Y.
- Sareyan J.-P.
- López-González M.J.
- Dupret M.-A.
- Grigahcéne A.
- De Ridder J.
- Klingenberg G.
- Wolf M.
- Van Cauteren P.
- Lampens P.
- Martínez D.
- Casanova V.M.
- Aceituno F.J.
- Helvaci M.
- Hintz E.G.
- Král L.
- Fumagalli F.
- Simonetti J.H.
- Granslo B.H.
- Kotková L.
- Santacana G.
- Michelet J.
- Fauvaud M.
- Vugnon J.-M.
- Sadsaoud H.
- Aliouane S.
- Grigahcéne Z.C.
- Martín-Ruíz S.
- Amado P.J.
- Suárez J.C.
- Moya A.
- Kuc`áková H.
- Kocián R.
- Truparová K.
- Avdibegovic` A.
- Blazek M.
- Kliner J.
- Zasche P.
- Vilásek M.
- Bartošíková S.
- Yasarsoy B.
- Ulusoy C.
- Graham K.A.
- Nicholson M.P.
- Trondal O.
- Yesilyaprak C.
- Coker D.
DOIAbstract
Context. BL Cam is an extreme metal-deficient field high-amplitude SX Phe-type variable where a very complex frequency spectrum is detected, with a number of independent nonradial modes excited, unusual among the high-amplitude pulsators in the Lower Classical Instability Strip. Aims. An extensive and detailed study has been carried out to investigate the pulsational content and properties of this object. Methods. The analysis is based on 283 h of CCD observations obtained in the Johnson V filter, during a long multisite photometric campaign carried out along the Northern autumn-winter of 2005-2006. Additionally, multicolour BI photometry was also collected to study the phase shifts and amplitude ratios, between light curves obtained in dif...
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