δ Scuti stars in Praesepe. I. The STACC 1998 campaign - The photometry

S. Frandsen, A. Pigulski, J. Nuspl, M. Breger, J. A. Belmonte, T. H. Dall, T. Arentoft, C. Sterken, T. Medupe, S. K. Gupta, F. J.G. Pinheiro, M. J.P.F.G. Monteiro, C. Barban, M. Chevreton, E. Michel, J. M. Benkö, S. Barcza, R. Szabó, Z. Kolaczkowski, G. KopackiS. N. Udovichenko

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We present the results of the multisite differential CCD photometry for the two δ Scuti stars, BN and BV Cnc, in the open cluster Praesepe. The main objective was to identify the character of the pulsation modes in BN Cnc deriving their accurate periods, amplitudes and phases. These parameters are essential for the mode identification which uses combined photometric and spectroscopic data and is presented in the second article. For BN Cnc, six pulsation modes with amplitudes above the detection limit (∼0.5 mmag) were detected. Using the same CCD frames it was possible to verify the presence of the four pulsation modes in BV Cnc, the faintest of δ Scuti stars in Praesepe. It is shown that in this very low-amplitude pulsator, substantial amplitude variations are seen between 1997 and 1998.

Original languageEnglish
Pages (from-to)175-187
Number of pages13
JournalAstronomy and Astrophysics
Volume376
Issue number1
DOIs
Publication statusPublished - Jan 1 2001

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Keywords

  • Open clusters and associations: individual: Praesepe
  • Stars: oscillations
  • Stars: variable: δ Scuti

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Frandsen, S., Pigulski, A., Nuspl, J., Breger, M., Belmonte, J. A., Dall, T. H., Arentoft, T., Sterken, C., Medupe, T., Gupta, S. K., Pinheiro, F. J. G., Monteiro, M. J. P. F. G., Barban, C., Chevreton, M., Michel, E., Benkö, J. M., Barcza, S., Szabó, R., Kolaczkowski, Z., ... Udovichenko, S. N. (2001). δ Scuti stars in Praesepe. I. The STACC 1998 campaign - The photometry. Astronomy and Astrophysics, 376(1), 175-187. https://doi.org/10.1051/0004-6361:20010950