Radial velocity study of the roAp star α Circinus

Details Radial velocity study of the roAp star α Circinus Radial velocity study of the roAp star α Circinus

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.344..242b&link_type=abstract

Monthly Notice of the Royal Astronomical Society, Volume 344, Issue 1, pp. 242-246.

Other

14

Stars: Individual: Α Circinus, Stars: Oscillations, Stars: Variables: Other

Scientific paper

We present results of 548 high-dispersion spectra of the roAp star α Circinus over a five-night period. The pulsational radial velocities measured from the rare-earth elements, Nd III, Hα and Hβ are easily measured and occur at the photometric period. The amplitude is largest in Nd III and Hα, is lower in the rare earths and Hβ, and cannot be measured in other metal lines. This behaviour can be understood in terms of an increase of pulsational amplitude with height in the atmosphere coupled with abundance stratification. The radial velocities show a significant variation at the rotational period of 4.463 d and a marginally significant periodicity at a frequency of 8.16 cycle d-1. The latter may be a very low-amplitude δ Scuti pulsation.

Affiliated with

Also associated with

No associations

Rating

Radial velocity study of the roAp star α Circinus 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 Radial velocity study of the roAp star α Circinus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radial velocity study of the roAp star α Circinus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1080447