Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-02-03T12:12:31.963Z Has data issue: false hasContentIssue false
  • English
  • Français

53 Piscium, an SPB Star with Activity

Published online by Cambridge University Press:  12 April 2016

J.-M. Le Contel ,
P. Mathias ,
E. Chapellier  and
J.-C. Valtier
J.-M. Le Contel
Affiliation:
Observatoire de la Côte d’Azur, Département Fresnel, UMR 6528, Nice, France
P. Mathias
Affiliation:
Observatoire de la Côte d’Azur, Département Fresnel, UMR 6528, Nice, France
E. Chapellier
Affiliation:
Observatoire de la Côte d’Azur, Département Fresnel, UMR 6528, Nice, France
J.-C. Valtier
Affiliation:
Observatoire de la Côte d’Azur, Département Fresnel, UMR 6528, Nice, France

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The star 53 Psc (HD 3379, B2.5IV) has been observed as variable by several authors (Sareyan et al., 1979) with frequencies around 10 c d–1 and has been classified as a β Cephei star. Conversely, other authors (e.g. Percy, 1971) found it to be constant.

New high resolution, high signal-to-noise ratio, Spectroscopic observations have been performed at the Observatoire de Haute-Provence in 1996 over 11 nights. The spectral domain covers around 200 Å and is centered on Hδ. Radial velocities were deduced from an auto-correlation technique with a scatter around 0.4kms−1.

No high frequency variations are observed. Three frequencies have been detected with a false alarm detection above the 1 % level. A fourth one may be present but its amplitude is below this 1 % level. Results are displayed in Table 1.

Type
Part 2.2. B-Type Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 236 - 237
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

>Cox, J.P. 1980, Theory of Stellar Pulsation, (Princeton University Press)Google Scholar
Percy, J.R. 1971, AJ, 76, 1105 CrossRefGoogle Scholar
Sareyan, J.-P., Le Contel, J.-M., Ducatel, D., & Valtier, J.-C. 1979, A&A, 72, 313 Google Scholar