寻找经典仙王座 KN Cen 期间的进化变化

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Astrophysical Bulletin Pub Date : 2024-05-08 DOI:10.1134/S1990341324700251

L. N. Berdnikov, A. K. Dambis

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引用次数: 0

摘要

Abstract 对仙王座KN Cen的所有现有光度测量进行了分析，以构建其跨越134年长时间间隔的（(O-C)）图。这使得首次计算出仙王座的演化周期增加率成为可能，（(dP/dt=+2.91(\pm{1.68})\) s yr\({}^{-1}\), 这与不稳定带第三次交叉的模型计算结果是一致的。Lombard 和 Koen 提出的脉动稳定性检验证实了演化周期变化的真实性。

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A Search for Evolutionary Changes in the Period of Classical Cepheid KN Cen

All available photometry for the Cepheid KN Cen is analyzed to construct its \((O-C)\) diagram spanning a 134-year long time interval. This made it possible for the first time to compute the rate of evolutionary period increase of the Cepheid, \(dP/dt=+2.91(\pm{1.68})\) s yr\({}^{-1}\), which is consistent with the results of model computations for the third crossing of the instability strip. The test for stability of pulsations proposed by Lombard and Koen confirmed the reality of the evolutionary period change.

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来源期刊

Astrophysical Bulletin 地学天文-天文与天体物理

CiteScore

2.00

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： Astrophysical Bulletin is an international peer reviewed journal that publishes the results of original research in various areas of modern astronomy and astrophysics, including observational and theoretical astrophysics, physics of the Sun, radio astronomy, stellar astronomy, extragalactic astronomy, cosmology, and astronomy methods and instrumentation.