A New C–D-like Diagram for SPB Stars: The Variations of Period Spacing as a Signature of Evolutionary Status
A New C–D-like Diagram for SPB Stars: The Variations of Period Spacing as a Signature of Evolutionary Status
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SPB 恒星的新 C-D 型图：周期间隔的变化作为进化状态的标志
DOI：
10.3847/1538-4357/aadf85
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发表时间：
2018-09
期刊：
影响因子：
--
通讯作者：
Deng Zhen-Min
中科院分区：
文献类型：
--
作者：
Wu Tao;Li Yan;Deng Zhen-Min
The slowly pulsating B-type (SPB) stars are the upper main-sequence stars on the HR diagram. Their oscillations are high-order, low-degree g-mode and can be used to probe the structure of the radiative zone near the outer boundary of the convective core and constrain the chemical mixing in stellar interiors. In SPB stars, the period spacing periodically varies with periods. It has been regarded as a signature of the chemical composition gradient beyond the convective core. Based on theoretical calculations, we find that the variation frequency of the period spacings (fΔP) is related to the width of the μ-gradient region on the buoyancy radius (Λμ) with the relation of fΔP ∼ 0.5Λμ. This indicates that the variation frequency fΔP is sensitive to the central hydrogen mass fraction XC (i.e., the evolutionary status). Finally, we find that the variation frequency fΔP and the means of the period spacings can be used to construct a new C–D-like diagram (fΔP versus ), which can be used to roughly decide the stellar evolutionary stages and to approximately determine stellar mass for SPB stars.
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影响因子：
4.8
作者：
C. Jiang;J. Christensen-Dalsgaard
通讯作者：
C. Jiang;J. Christensen-Dalsgaard
影响因子：
64.8
作者：
P. Degroote;C. Aerts;A. Baglin;A. Miglio;M. Briquet;A. Noels;E. Niemczura;J. Montalbán;S. Bloemen-S.
通讯作者：
P. Degroote;C. Aerts;A. Baglin;A. Miglio;M. Briquet;A. Noels;E. Niemczura;J. Montalbán;S. Bloemen-S.
影响因子：
1.9
作者：
J. Christensen-Dalsgaard
通讯作者：
J. Christensen-Dalsgaard
影响因子：
4.8
作者：
R. Ouazzani;S. Salmon;V. Antoci;T. Bedding;T. Bedding;Simon J. Murphy;Simon J. Murphy;I. Roxburgh
通讯作者：
R. Ouazzani;S. Salmon;V. Antoci;T. Bedding;T. Bedding;Simon J. Murphy;Simon J. Murphy;I. Roxburgh
DOI：
10.1088/0067-0049/208/1/4
发表时间：
2013-01
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
B. Paxton;M. Cantiello;P. Arras;L. Bildsten;E. Brown;A. Dotter;C. Mankovich;M. Montgomery;D. S
通讯作者：
B. Paxton;M. Cantiello;P. Arras;L. Bildsten;E. Brown;A. Dotter;C. Mankovich;M. Montgomery;D. S