Solar-stellar connection: the frequency of maximum oscillation power from solar data

Eclipse on the Coral Sea: Cycle 24 Ascending

物理学;天文学

Barban, C.^1 ; Beuret, M.^1 ; Baudin, F.^2 ; Belkacem, K.^1 ; Goupil, M.J.^1 ; Samadi, R.^1

LESIA, CNRS UMR 8109, Observatoire de Paris, France^1

Institut DAstrophysique Spatiale, UMR8617, CNRS, France^2

关键词: Global quantities;    Observational method;    Oscillation power;    Scaling relations;    Solar cycle;    Solar data;    Stellar oscillations;    Stellar parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/440/1/012031/pdf
DOI  :  10.1088/1742-6596/440/1/012031

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Stellar oscillations provide powerful tools to derive stellar fundamental parameters such as the mass and radius. These global quantities are derived from scaling relations linking seismic quantities [νmaxand Δν to global stellar parameters. These relations use the Sun as a reference. In this work, we used VIRGO and GOLF data to study how the solar frequency at the maximum oscillation power (νmax) varies with time along the solar cycle. We show that these variations imply differences of about 4% in radius and 12% in mass. We showed also that the observational method based on intensity or velocity data has also an impact, implying differences in mass of about 22% and 7% in radius.