Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...398.1117k&link_type=abstract
Astronomy and Astrophysics, v.398, p.1117-1119 (2003)
Astronomy and Astrophysics
Astrophysics
6
Stars: Chemically Peculiar, Stars: Individual: Hd 965, Stars: Oscillations, Stars: Variables: General
Scientific paper
HD 965 is a strongly magnetic peculiar A star with clear Zeeman splitting in its spectral lines, a rotation period greater than 2 yr, H-line core-wing anomaly, and strongly negative Strömgren delta c1 and delta m1 indices. All of these characteristics are typical of the rapidly oscillating Ap stars, and it has been suggested that HD 965 should be one. We have tested this star for photometric variability under excellent conditions with low scintillation noise using the 2-m TBL for 2.7 hr at Pic du Midi Observatory. The amplitude spectrum of the light curve is flat with noise peaks below 0.2 mmag in the frequency range of the roAp stars. This suggests that it is a non-oscillating Ap star, although proof of that will need further observations each year for many years, to rule out the possibility that rotational modulation has suppressed the observed amplitude in 2002.
Chevreton M.
Dolez Noel
Kurtz Don W.
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