Search for evolutionary changes in the periods of cepheids: V1033 Cyg, a classical cepheid at the first crossing of the instability strip
For the classical Cepheid V1033 Cyg we have constructed an O—C diagram spanning a time interval of 117 years. The O—C diagram has the shape of a parabola, which has made it possible to determine for the first time the quadratic light elements and to calculate the rate of evolutionary increase in the...
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2019
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| In: |
Astronomy letters
Year: 2019, Jahrgang: 45, Heft: 4, Pages: 227-236 |
| ISSN: | 1562-6873 |
| DOI: | 10.1134/S1063773719040017 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1134/S1063773719040017
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| Verfasserangaben: | L.N. Berdnikov, E.N. Pastukhova, V.V. Kovtyukh, B. Lemasle, A. Yu. Kniazev, I.A. Usenko, G. Bono, E. Grebel, G. Hajdu, S.V. Zhuiko, S.N. Udovichenko, and L.E. Keir |
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| 520 | |a For the classical Cepheid V1033 Cyg we have constructed an O—C diagram spanning a time interval of 117 years. The O—C diagram has the shape of a parabola, which has made it possible to determine for the first time the quadratic light elements and to calculate the rate of evolutionary increase in the period dP/dt = 18.19 (±0.08) syr−1, in agreement with the results of theoretical calculations for the first crossing of the instability strip. Thus, V1033 Cyg is the second actually observed Cepheid (after α UMi) that crosses the instability strip for the first time. | ||
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| 700 | 1 | |a Usenko, I. A. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Keir, L. E. |e VerfasserIn |4 aut | |
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