Internal Rotation and Inclinations of Slowly Pulsating B Stars: Evidence of Interior Angular Momentum Transport

被引:22
作者
Pedersen, May G. [1 ]
机构
[1] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Kohn Hall, Santa Barbara, CA 93106 USA
基金
美国国家科学基金会;
关键词
G-MODES; SPB STAR; DIFFERENTIAL ROTATION; CORIOLIS-FORCE; GRAVITY MODES; MAIN-SEQUENCE; KEPLER; MISSION; IDENTIFICATION; PHOTOMETRY;
D O I
10.3847/1538-4357/ac947f
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
One of the largest uncertainties in stellar structure and evolution theory is the transport of angular momentum in the stellar interiors. Asteroseismology offers a powerful tool for measuring the internal rotation frequencies of pulsating stars, but the number of such measurements has remained few for greater than or similar to 3 M (circle dot) main-sequence stars. In this work, we compile a list of 52 slowly pulsating B stars for which the interior rotation has been measured asteroseismically. The measurements of the spin parameters, which describe the relative importance of rotation, for the gravito-inertial mode oscillations show that for 40 of the stars the oscillations fall within the subinertial regime. We find that the core rotation frequencies of the stars decrease as a function of age and show evidence of angular momentum transport occurring on the main sequence. Finally, we derive the inclination angles of the stars, showing that they are generally consistent with the expectations from surface cancellation effects for the given oscillation modes.
引用
收藏
页数:18
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