Five colour photometry of the RRd star V372 Serpentis

J. Benkő, S. Barcza

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Aims. The first U-band and new BV(RI)C photometry of the RRd star V372 Ser is presented to determine some parameters of the star. Methods. In April, May 2007, 2812 U, B,V, RC, IC frames were obtained at Konkoly and Teide Observatories and 1508 V observations were collected from the literature. Fourier fitted light curves were derived in all bands. Results. The non-linearly coupled frequencies f0 = (2.121840 ± .000001) cycles day?1, f1 = (2.851188 ± .000001) c d?1, i.e. periods P0 = 0.4712891 ± .0000002 days, P1 = 0.3507310 ± .0000001 d, P1/P0 = 0.7441950, amplitudes A(V) 0 = 0.15399 mag, A(V) 1 = 0.20591 mag, and phases have been found. A1/A0 = 1.319 ± .008 has been found from averaging the amplitude ratio in the different bands i.e. the first overtone is the dominant pulsation mode. From the V observations, upper limits are given for secular change of the Fourier parameters. The period ratio and period put V372 Ser among the RRd stars of the globular clusters M3 and IC 4499; mass, luminosity, and metallicity estimates are given.

Original languageEnglish
Pages (from-to)481-485
Number of pages5
JournalAstronomy and Astrophysics
Volume497
Issue number2
DOIs
Publication statusPublished - Apr 2009

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photometry
color
stars
observatory
globular clusters
light curve
metallicity
observatories
luminosity
harmonics
cycles
estimates
parameter
method

Keywords

  • Stars: fundamental parameters
  • Stars: Individual: V372 Serpentis
  • Stars: Variables: RR Lyr

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Five colour photometry of the RRd star V372 Serpentis. / Benkő, J.; Barcza, S.

In: Astronomy and Astrophysics, Vol. 497, No. 2, 04.2009, p. 481-485.

Research output: Contribution to journalArticle

Benkő, J. ; Barcza, S. / Five colour photometry of the RRd star V372 Serpentis. In: Astronomy and Astrophysics. 2009 ; Vol. 497, No. 2. pp. 481-485.
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AB - Aims. The first U-band and new BV(RI)C photometry of the RRd star V372 Ser is presented to determine some parameters of the star. Methods. In April, May 2007, 2812 U, B,V, RC, IC frames were obtained at Konkoly and Teide Observatories and 1508 V observations were collected from the literature. Fourier fitted light curves were derived in all bands. Results. The non-linearly coupled frequencies f0 = (2.121840 ± .000001) cycles day?1, f1 = (2.851188 ± .000001) c d?1, i.e. periods P0 = 0.4712891 ± .0000002 days, P1 = 0.3507310 ± .0000001 d, P1/P0 = 0.7441950, amplitudes A(V) 0 = 0.15399 mag, A(V) 1 = 0.20591 mag, and phases have been found. A1/A0 = 1.319 ± .008 has been found from averaging the amplitude ratio in the different bands i.e. the first overtone is the dominant pulsation mode. From the V observations, upper limits are given for secular change of the Fourier parameters. The period ratio and period put V372 Ser among the RRd stars of the globular clusters M3 and IC 4499; mass, luminosity, and metallicity estimates are given.

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KW - Stars: Variables: RR Lyr

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