Strong horizontal photospheric magnetic field in a surface dynamo simulation

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Strong horizontal photospheric magnetic field in a surface dynamo simulation

Context. Observations with the Hinode spectro-polarimeter have revealed strong horizontal internetwork magnetic fields in the quiet solar photosphere. Aims. We aim at interpreting the observations by means of results from numerical simulations. Methods. Radiative MHD simulations of dynamo action by near-surface convection are analyzed with respect to the relation between vertical and horizontal...

متن کامل

Magnetic structures in a dynamo simulation

'Theoretical Astrophysics Center, Blegdamsvej 17, DK-2100 Copenhagen 0, Denmark 4Copenhagen University Observatory, 0ster Voldgade 3, DK-1350 Copenhagen, Denmark 50bservatoire Midi-Pyrenkes, 14 av. E. Belin, F-31400 Toulousc, France 6CERFACS. 42, Avenue Coriolis, F-31057 Toulouse, France 'Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA *Observatory, PO Box...

متن کامل

A Vorticity-magnetic Field Dynamo Instability

We generalize the mean field magnetic dynamo to include local evolution of the mean vorticity in addition to the mean magnetic field. The coupled equations exhibit a general mean field dynamo instability that enables the transfer of turbulent energy to the magnetic field and vorticity on larger scales. The growth of the vorticity and magnetic field both require helical turbulence which can be s...

متن کامل

Photospheric magnetic field and chromospheric emission

We present a statistical analysis of network and internetwork properties in the photosphere and the chromosphere. For the first time we simultaneously observed (a) the four Stokes parameters of the photospheric iron line pair at 630.2 nm and (b) the intensity profile of the Ca H line at 396.8 nm. The vector magnetic field was inferred from the inversion of the iron lines. We aim at an understan...

متن کامل

Dynamo Theory and Earth’s Magnetic Field

The Earth’s magnetic field belongs in that class of physical phenomena which are commonplace yet also very complex. It is commonplace in that almost everyone knows that it exists, yet not very many people (probably including a good percentage of physicists) know how it works. The theory behind the generation of a magnetic field, known as dynamo theory, is still an active area of research. The e...

متن کامل

ذخیره 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: Astronomy & Astrophysics

سال: 2008

ISSN: 0004-6361,1432-0746

DOI: 10.1051/0004-6361:20078998