Zobrazeno 1 - 10
of 30 545
pro vyhledávání: '"Differential rotation"'
We model the stochastic excitation of acoustic modes in solar-like pulsators taking into account the action of differential rotation. We derive the theoretical formalism for the stochastic excitation with differential rotation and make use of rotatin
Externí odkaz:
http://arxiv.org/abs/2410.22547
Publikováno v:
A&A, 689, A262 (2024)
Stellar spot distribution has consequences on the observable periodic signals in long-time baseline ground-based photometry. We model the statistics of the dominating spots of two young and active Solar-type stars, V889 Her and LQ Hya, in order to ob
Externí odkaz:
http://arxiv.org/abs/2410.06076
The presence of dips in the gravito-inertial modes period-spacing pattern of gamma-Dor stars is now well established by recent asteroseismic studies. Such Lorentzian-shaped inertial dips arise from the interaction of gravito-inertial modes propagatin
Externí odkaz:
http://arxiv.org/abs/2410.21425
We present a series of 9 Doppler images of the magnetically active K component of the RS CVn-type binary SZ Psc, based on the high-resolution spectroscopic data collected from 2014 to 2018. We apply least-squares deconvolution to all spectra to extra
Externí odkaz:
http://arxiv.org/abs/2410.17497
We study local magnetohydrodynamical (MHD) instabilities of differential rotation in magnetised, stably-stratified regions of stars and planets using a Cartesian Boussinesq model. We consider arbitrary latitudes and general shears (with gravity direc
Externí odkaz:
http://arxiv.org/abs/2410.06989
Autor:
Tlatov, Andrei G., Tlatova, Kseniia A.
The analysis of the rotation rate of individual sunspots and pores was performed according to the data of the processing of observations by the \textit{Solar Dynamics Observatory/Helioseismic and Magnetic Imager} (SDO/HMI) in the period 2010\,--\,202
Externí odkaz:
http://arxiv.org/abs/2411.06985
Autor:
Böning, Vincent G. A., Wicht, Johannes
All planets and stars rotate. All gas planets in our solar system, the Sun, and many stars show a pattern of east- or westward mean flows. This phenomenon is known as differential rotation in the stellar and as zonal jets in the planetary context. Ob
Externí odkaz:
http://arxiv.org/abs/2407.13484
Autor:
Takeda, Yoichi
The iodine-cell technique, which is known to be efficient in precisely establishing Doppler velocity shifts, was once applied by the author to measuring the solar differential rotation based on full-disk spectroscopic observations (Takeda and Ueno, S
Externí odkaz:
http://arxiv.org/abs/2406.18271
Autor:
Kumar, Prince, Sharma, Devendra
A numerical simulation of Kelvin-Helmholtz Instability (KHI) in parallel shear flows subjected to external rotation is carried out using a pseudo-spectral technique. The Coriolis force, arising in a rotation frame under the beta plane approximation,
Externí odkaz:
http://arxiv.org/abs/2406.06256
Differential rotation is one of the basic characteristics of the Sun, and it plays an important role in generating the magnetic fields and its activities. We investigated rotation rate using chromospheric features such as plages, enhanced network, ac
Externí odkaz:
http://arxiv.org/abs/2405.07532