Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..431g&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 94, Aug. 1987, p. 431-436. Research supported by the Fondo Colombiano de Investigaci
Astronomy and Astrophysics
Astronomy
9
Cepheid Variables, Frequency Distribution, Radial Velocity, Spectrum Analysis, Stellar Spectrophotometry
Scientific paper
New photometric and radial-velocity observations of the short-period Cepheid EU Tauri show systematic deviations from a smooth curve when plotted in phase according to the accepted period of 2.1025 days. These deviations suggest that the star may be multiperiodic, or now may have a single period which differs from the older value. Frequency analysis of the existing data was undertaken to investigate these possibilities. It is found that a better fit to the new data is obtained by using a revised primary period, P1 = 2.0895 days. Furthermore, the light and velocity variations can be reproduced to within the observational scatter by the sum of only two sinusoids, with periods P1 and P2 = P1/2. This apparent simple harmonic composition of the EU Tau curves is rare, if not unique, among the known short-period Cepheids. It is suggested that this could indicate the presence of a 2:1 resonance between the second and a higher overtone of pulsation in the star.
Gieren Wolfgang P.
Matthews Jaymie M.
No associations
LandOfFree
Frequency analysis of the short-period Cepheid EU Tauri 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 Frequency analysis of the short-period Cepheid EU Tauri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency analysis of the short-period Cepheid EU Tauri will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1339811