1 / 10

D.Sokoloff Moscow University & IZMIRAM , Moscow, Russia E.Yushkov, A.Lukin P.Frick, Russia

Solar Helicities in Theory and Observations: Implications for Space Weather and Dynamo Theories NORDITA, Stockholm, Sweden, 04 – 08 March 2019 Helicity separation in small-scale dynamo. D.Sokoloff Moscow University & IZMIRAM , Moscow, Russia E.Yushkov, A.Lukin P.Frick, Russia.

swiles
Télécharger la présentation

D.Sokoloff Moscow University & IZMIRAM , Moscow, Russia E.Yushkov, A.Lukin P.Frick, Russia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Solar Helicities in Theory and Observations: Implications for Space Weather and Dynamo Theories NORDITA, Stockholm, Sweden, 04 – 08 March 2019 Helicity separation in small-scale dynamo D.Sokoloff Moscow University & IZMIRAM, Moscow, Russia E.Yushkov, A.Lukin P.Frick, Russia

  2. Stabilization of mean-field (say, solar) dynamo – helicity separation • Dynamo excited large-scale magnetic field is helical • Magnetic helicity conservation • Magnetic helicity of opposite signhave to be accumullated ibn small scale • It spoils dynamo action • Presumption: Small-scale dynamo does not contribiye in the helicity balance

  3. Diff. rotation or random P BT BP Mirror asymmetry or random P BP BT LARGE-SCALE DYNAMO Versus small-scale one There are imprints of small-scale dynamo in solar proxies

  4. THE MAIN MESSAGE OF THE TALK SMALL-SCALE DYNAMO CAN ACTS IN A MIRROR-ASYMMETRIC MEDIA In this case it contains helicity separation similar to the large-scale dynamo

  5. Small-scale dynamo • Basic equation - Kazantsev 1967. • Intensively investigated in 80-th and less popular later

  6. If the medm is mirror asymmetric. Small-scale magnetic field becomes helical. Helicity separation

More Related