Simultaneous multicolor photometry of the pulsating CP 2 star HD 128898 (Alpha Cir)

Details Simultaneous multicolor photometry of the pulsating CP 2 star HD 128898 (Alpha Cir) Simultaneous multicolor photometry of the pulsating CP 2 star HD 128898 (Alpha Cir)

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135..148w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 1, June 1984, p. 148-151. Sponsorship: Fonds zur Foerderung der wisse

Astronomy and Astrophysics

Astrophysics

28

A Stars, Peculiar Stars, Stellar Oscillations, Stellar Spectrophotometry, Phase Shift, Power Spectra

Scientific paper

The results of 3 hr of photometric observations of the CP 2 star HD 128898 in July 1982 are reported. The pulsating object had a 6.8 min period and a B-amplitude larger than previously measured. A five channel power spectrum revealed that the signal amplitude is a function of wavelength. A temperature of 8000 K is calculated. Phase shifts were detected that suggest the occurrence of nonradial stellar oscillations, contrary to results from an oblique pulsator model.

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