The field high-amplitude SX Phe variable BL Cam: results from a multisite photometric campaign

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Fauvaud S., Sareyan J. -., Ribas I., Rodriguez E., Lampens P., Klingenberg G., ...More

ASTRONOMY & ASTROPHYSICS, vol.515, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 515
  • Publication Date: 2010
  • Doi Number: 10.1051/0004-6361/201014243
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: stars: variables: delta Scuti, stars: individual: BL Camelopardalis, stars: oscillations, binaries: general, techniques: photometric, LONG-TERM VARIABILITY, DELTA-SCUTI STARS, STELLAR EVOLUTION, PHOENICIS STARS, DWARF CEPHEIDS, PERIOD CHANGES, CAMELOPARDALIS, STRAGGLERS, PLANETS, TRIPLE
  • Akdeniz University Affiliated: Yes


Context. Short-period high-amplitude pulsating stars of Population I (delta Sct stars) and II (SX Phe variables) exist in the lower part of the classical (Cepheid) instability strip. Most of them have very simple pulsational behaviours, only one or two radial modes being excited. Nevertheless, BL Cam is a unique object among them, being an extreme metal-deficient field high-amplitude SX Phe variable with a large number of frequencies. Based on a frequency analysis, a pulsational interpretation was previously given.