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

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Frandsen, S (Author) Other; Pigulski, A (Author) Other; Nuspl, J (Author) Other; Breger, M (Author) Other; Belmonte, JA (Author) Other; Dall, TH (Author) Other; Arentoft, T (Author) Other; Sterken, C (Author) Other; Medupe, T (Author) Other; Gupta, SK (Author) Other; Pinheiro, FJG (Author) FCUP; Monteiro, MJPFG (Author) FCUP; Barban, C (Author) Other; Chevreton, M (Author) Other; Michel, E (Author) Other; Benko, JM (Author) Other; Barcza, S (Author) Other; Szabo, R (Author) Other; Kolaczkowski, Z (Author) Other; Kopacki, G (Author) Other; Udovichenko, SN (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 376

Pages: 175-187

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 7 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Astronomy > Astrophysics ; Physical sciences > Astronomy ; Physical sciences

Other information

Authenticus ID: P-000-TB9

DOI: 10.1051/0004-6361:20010950

Resumo (PT): We present the results of the multisite differential CCD photometry for the two delta 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 delta Scuti stars in Praesepe. It is shown that in this very low-amplitude pulsator, substantial amplitude variations are seen between 1997 and 1998. Based in part on observations obtained at the European Southern Observatory at La Silla, Chile (Application 60D-0148).

Abstract (EN): We present the results of the multisite differential CCD photometry for the two delta 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 (similar to0.5 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 delta Scuti stars in Praesepe. It is shown that in this very low-amplitude pulsator, substantial amplitude variations are seen between 1997 and 1998.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13