Results 1 to 10 of about 21,110 (305)

SEISMIC CONSTRAINTS ON INTERIOR SOLAR CONVECTION [PDF]

The Astrophysical Journal, 2010
We constrain the velocity spectral distribution of global-scale solar convective cells at depth using techniques of local helioseismology. We calibrate the sensitivity of helioseismic waves to large-scale convective cells in the interior by analyzing simulations of waves propagating through a velocity snapshot of global solar convection via methods of ...
Hanasoge, S., Duvall, T., DeRosa, M.
openaire   +5 more sources

TOMOGRAPHY OF THE SOLAR INTERIOR [PDF]

Modern Physics Letters A, 2006
Solar oscillations consist of a rich spectrum of internal acoustic waves and surface gravity waves, stochastically excited by turbulent convection. They have been monitored almost continuously over the last ten years with high-precision Doppler images of the solar surface.
L Gizon
exaly   +5 more sources

Element diffusion in the solar interior [PDF]

The Astrophysical Journal, 1994
We study the diffusion of helium and other heavy elements in the solar interior by solving exactly the set of flow equations developed by Burgers for a multi-component fluid, including the residual heat-flow terms. No approximation is made concerning the relative concentrations and no restriction is placed on the number of elements considered.
Thoul, Anne, BAHCALL, J. N., LOEB, A.
openaire   +2 more sources

SOHO – an Observatory to Study the Solar Interior and the Solar Atmosphere [PDF]

International Astronomical Union Colloquium, 1990
AbstractThe Solar and Heliospheric Observatory, Soho, is a joint venture of ESA and NASA. The main objectives of Soho are: a) the study and understanding of solar coronal phenomena; and b) the study of the solar structure and interior dynamics from its core to the photosphere.
A. I. Poland, V. Domingo
openaire   +2 more sources

Solar Interior

This chapter introduces the reader to the solar interior, in particular the convection zone. The first section explores the solar cycle and the dynamo models that have been studied to explain this cycle. The second section explores helioseismology observations and analysis of the solar interior, and reviews the fundamental knowledge that has been ...
Linton, Mark, Dikpati, Mausumi, Howe, Rachel   +2 more
openaire   +2 more sources

Rotation of the solar interior

, 1999
Helioseismology has allowed us to infer the rotation in the greater part of the solar interior with high precision and resolution. The results show interesting conflicts with earlier theoretical expectations, indicating that the the Sun is host to complex dynamical phenomena, so far hardly understood. This has important consequences for our ideas about
Christensen-Dalsgaard, J.; id_orcid 0000-0001-5137-0966, Thompson, M.J.   +1 more
openaire   +4 more sources

Seismic Probes of Solar Interior Magnetic Structure

Physical Review Letters, 2012
Sunspots are prominent manifestations of solar magnetoconvection and imaging their subsurface structure is an outstanding problem of wide physical importance. Travel times of seismic waves that propagate through these structures are typically used as inputs to inversions.
Hanasoge, S., Birch, A., Gizon, L., Tromp, J.   +3 more
openaire   +6 more sources

Differential Rotation in the Solar Interior [PDF]

International Astronomical Union Colloquium, 1970
One of the big problems in stellar rotation which has been the object of much debate recently concerns the magnitude of the angular velocity in the central regions of the sun. It is a good example of our general ignorance of the distribution of angular momentum in the interiors of stars. There is good reason, of course, for this ignorance.
openaire   +1 more source

Fractal Nature of Solar Interior

, 2006
5 pages no ...
Ghosh, Koushik, Raychaudhuri, Probhas
openaire   +2 more sources

Mercury at the Dawn of a New Exploration Phase. [PDF]

Nat Commun
Del Vecchio E, Zomerdijk-Russell S, Buoninfante S.   +2 more
europepmc   +1 more source