منابع مشابه
Solar rotation
This paper reviews current understanding of the internal rotation of the Sun. We summarise the outcome of the latest helioseismic measurements of the angular velocity profile, and review existing dynamical models of rotation in the convection zone and in the radiative zone beneath. Finally, we discuss preliminary results along a new line of investigation.
متن کاملThe Age – Activity – Rotation Relationship in Solar – Type Stars . ⋆
Measured from high–resolution spectra, we present Ca II K line chromospheric fluxes in 35 G dwarf stars of 5 open clusters to determine the age–activity–rotation relationship from the young Hyades and Praesepe (0.6 Gyr) to the old M 67 (∼ 4.5 Gyr) through the two intermediate age clusters IC 4651 and NGC 3680 (∼ 1.7 Gyr). The full amplitude of the activity index within a cluster is slightly abo...
متن کاملSolar Interior Rotation and its Variation
This article surveys the development of observational understanding of the interior rotation of the Sun and its temporal variation over approximately forty years, starting with the 1960s attempts to determine the solar core rotation from oblateness and proceeding through the development of helioseismology to the detailed modern picture of the internal rotation deduced from continuous helioseism...
متن کاملChromospheric activity and rotation of FGK stars in the solar vicinity ***
Context. Chromospheric activity produces both photometric and spectroscopic variations that can be mistaken as planets. Large spots crossing the stellar disc can produce planet-like periodic variations in the light curve of a star. These spots clearly affect the spectral line profiles, and their perturbations alter the line centroids creating a radial velocity jitter that might “contaminate” th...
متن کاملAstronomische Nachrichten Astronomical Notes RE PR INT On the solar rotation and activity
1 Hvar Observatory, Faculty of Geodesy, University of Zagreb, Kačićeva 26, HR-10000 Zagreb, Croatia 2 Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, D-79104 Freiburg, Germany 3 Geophysical Institute, Faculty of Science, University of Zagreb, Horvatovac bb, HR-10000 Zagreb, Croatia 4 Easy Toolkit, Inc., Houston, Texas, USA 5 Observatoire Royal de Belgique, Ave. Circulaire 3, B-1180 Bruxe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1989
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1989.tb00492.x