Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...351..267l&link_type=abstract
Astronomy and Astrophysics, v.351, p.267-272 (1999)
Astronomy and Astrophysics
Astrophysics
6
Stars: Binaries: Spectroscopic, Stars: Chemically Peculiar, Stars: Individual: Et And, Stars: Oscillations
Scientific paper
The result of recent photometric observations of the CP star ET And, published by Weiss et al. (1998), shows that the known brightness variation of about 145 min has to be obviously assigned to the comparison star HD 219891. In order to test this statement we investigate the Hipparcos photometry of ET And, HD 219891 and the check star, HD 219668, on the existence of pulsations. The significance of peaks found in the periodograms is estimated using empirically determined false alarm probability distributions derived from a large number of synthetic data sets. Results show that the probability of large peaks produced in the periodograms by only noise cannot be described by the well-known statistics valid for an evenly spaced time sampling. In the photometry of ET And we find a period of 0\fd103966 with a false alarm probability of 6% or less. For the two comparison stars we could not detect any signal in the data.
Hildebrandt Gerald
Lehmann Holger
Panov K.
Scholz Gerhard
No associations
LandOfFree
ET And, HD 219891, or HD 219668 - which one shows short-term variability? 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 ET And, HD 219891, or HD 219668 - which one shows short-term variability?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ET And, HD 219891, or HD 219668 - which one shows short-term variability? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1282633