Solar p modes of high degree l: coupling by differential rotation
نویسندگان
چکیده
منابع مشابه
Solar activity cycle frequency shifts of low-degree p-modes
We report on an extensive analysis of the low-degree p-mode frequency shifts over Solar Cycle n ̄ 22 (1984–1995) based on continuous data taken at the Observatorio del Teide (Tenerife). Aside from the known good correlation between frequency shifts and solar activity indices, we have also investigated on short and long time-scales correlations (from 2months to 1.5 years and from 1.5 to 11 years)...
متن کاملCoupling of solar p modes: quasi-degenerate perturbation theory
The interaction of a large-scale stationary poloidal velocity field (as a simple model for possibly existing giant cells) with solar p-mode oscillations is described by quasi-degenerate perturbation theory, as proposed by Lavely & Ritzwoller (1992). For oscillations of low degree (l ≤ 12) and sectoral velocity fields we obtain numerical solutions of the eigenvalue problem, and derive an approxi...
متن کاملInfluence of Low-Degree High-Order p-Mode Splittings on the Solar Rotation Profile
The solar rotation profile is well constrained down to about 0.25 R⊙ thanks to the study of acoustic modes. Since the radius of the inner turning point of a resonant acoustic mode is inversely proportional to the ratio of its frequency to its degree, only the low-degree p modes reach the core. The higher the order of these modes, the deeper they penetrate into the Sun and thus they carry more d...
متن کاملOn the effect of the inhomogeneous subsurface flows on the high degree solar p - modes
On the effect of the inhomogeneous subsurface flows on the high degree solar p-modes Abstract. The observed power spectrum of high-degree solar p-modes (ℓ > 200) shows discrepancies with the power spectrum predicted by the stochastic excitement and damping theory. In an attempt to explain these discrepancies, the present paper is concerned with the influence of the observed subsurface flows on ...
متن کاملThe potential of solar high - degree modes for structureinversionM
It is likely that precise and reliable frequencies of high-degree modes will soon be available from the SOI/MDI experiment. Here we examine the ability of such modes (with l > 300) to resolve the solar structure in the near-surface region. In particular, we investigate inversions to determine the adiabatic exponent ?1 (Basu & Christensen-Dalsgaard 1997) as a test of the solar equation of state,...
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: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.11894.x