Metallicism and pulsation: the discovery of large-amplitude delta Scuti pulsation in a high-metallicity rho Puppis star, HD 40765

Details Metallicism and pulsation: the discovery of large-amplitude delta Scuti pulsation in a high-metallicity rho Puppis star, HD 40765 Metallicism and pulsation: the discovery of large-amplitude delta Scuti pulsation in a high-metallicity rho Puppis star, HD 40765

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.276..199k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 276, Issue 1, pp. 199-205.

Astronomy and Astrophysics

Astronomy

19

Stars: Chemically Peculiar, Stars: Individual: Hd 40765, Stars: Oscillations, Delta Scuti

Scientific paper

We have discovered that HD 40765 is a singly periodic delta Scuti star pulsating in the fundamental or first overtone radial mode with a period of 4.070h. Its light variations are non-sinusoidal and have peak-to-peak amplitudes of DeltaB=0.21 mag and DeltaV=0.15 mag. This star is strongly metallic-lined. We classify the spectrum Fmp (kA7hF5mF5), where the `p' does not indicate peculiar in the Ap sense, but peculiar in the sense that the spectrum cannot be fully parametrized. HD 40765 is a large-amplitude delta Scuti star which is also a rho Puppis, or evolved Am, star. By comparison with rho Puppis itself, the inferred surface radial velocity variations are 14 km s^-1 peak-to-peak. This implies either (1) that such pulsation can be non-turbulent at the level of predicted diffusion velocities of order cm s^-1, or (2) that diffusion should be reconsidered as the sole explanation for the abundance anomalies in this star.

Affiliated with

Also associated with

No associations

Rating

Metallicism and pulsation: the discovery of large-amplitude delta Scuti pulsation in a high-metallicity rho Puppis star, HD 40765 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Metallicism and pulsation: the discovery of large-amplitude delta Scuti pulsation in a high-metallicity rho Puppis star, HD 40765, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallicism and pulsation: the discovery of large-amplitude delta Scuti pulsation in a high-metallicity rho Puppis star, HD 40765 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-831152