Abstract
Stability of both the fundamental and first overtone oscillations of RV Ari was investigated by different methods which led to concordant results. The fundamental period of RV Ari has been decreasing very slowly with a rate of (1/P0)(dP0/dt = -0.6 × 10-8 y-1 while the first overtone period has been increasing a little faster with a rate of (1/P1)(dP1/dt) = +0.9 × 10-8 y-1, if we assume linear period changes over the past 65 years. Although the very slow change in the periods is consistent with the evolutionary theories, the fact that the signs of the period changes for the two modes are opposite indicates that the dominating part of the period variation may be the result of non-evolutionary effects. The amplitudes of the fundamental and overtone oscillations have undergone small changes (several mmag) on a time scale of years, and a slight increase in the amplitude of the first overtone pulsation is suspected. An additional frequency at f2 = 13.6116 cd-1 is found.
| Original language | English |
|---|---|
| Pages (from-to) | 555-561 |
| Number of pages | 7 |
| Journal | Astronomy and Astrophysics |
| Volume | 393 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Oct 2002 |
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Keywords
- Stars: individual: RV Ari
- Stars: oscillations
- Stars: variables: δ Sct
ASJC Scopus subject areas
- Space and Planetary Science
Cite this
Long term behaviour of the double-mode high-amplitude δ Scuti star RV arietis. / Pócs, M. D.; Szeidl, B.; Virághalmy, G.
In: Astronomy and Astrophysics, Vol. 393, No. 2, 10.2002, p. 555-561.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Long term behaviour of the double-mode high-amplitude δ Scuti star RV arietis
AU - Pócs, M. D.
AU - Szeidl, B.
AU - Virághalmy, G.
PY - 2002/10
Y1 - 2002/10
N2 - Stability of both the fundamental and first overtone oscillations of RV Ari was investigated by different methods which led to concordant results. The fundamental period of RV Ari has been decreasing very slowly with a rate of (1/P0)(dP0/dt = -0.6 × 10-8 y-1 while the first overtone period has been increasing a little faster with a rate of (1/P1)(dP1/dt) = +0.9 × 10-8 y-1, if we assume linear period changes over the past 65 years. Although the very slow change in the periods is consistent with the evolutionary theories, the fact that the signs of the period changes for the two modes are opposite indicates that the dominating part of the period variation may be the result of non-evolutionary effects. The amplitudes of the fundamental and overtone oscillations have undergone small changes (several mmag) on a time scale of years, and a slight increase in the amplitude of the first overtone pulsation is suspected. An additional frequency at f2 = 13.6116 cd-1 is found.
AB - Stability of both the fundamental and first overtone oscillations of RV Ari was investigated by different methods which led to concordant results. The fundamental period of RV Ari has been decreasing very slowly with a rate of (1/P0)(dP0/dt = -0.6 × 10-8 y-1 while the first overtone period has been increasing a little faster with a rate of (1/P1)(dP1/dt) = +0.9 × 10-8 y-1, if we assume linear period changes over the past 65 years. Although the very slow change in the periods is consistent with the evolutionary theories, the fact that the signs of the period changes for the two modes are opposite indicates that the dominating part of the period variation may be the result of non-evolutionary effects. The amplitudes of the fundamental and overtone oscillations have undergone small changes (several mmag) on a time scale of years, and a slight increase in the amplitude of the first overtone pulsation is suspected. An additional frequency at f2 = 13.6116 cd-1 is found.
KW - Stars: individual: RV Ari
KW - Stars: oscillations
KW - Stars: variables: δ Sct
UR - http://www.scopus.com/inward/record.url?scp=0036791084&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036791084&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20021081
DO - 10.1051/0004-6361:20021081
M3 - Article
AN - SCOPUS:0036791084
VL - 393
SP - 555
EP - 561
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
IS - 2
ER -