Video/Audio Open Access

Building and maintaining a solar tachocline through convective dynamo action

Matilsky, Loren Isaac; Toomre, Juri


JSON-LD (schema.org) Export

{
  "description": "<p>The dynamical maintenance of the Sun&rsquo;s tachocline of rotational shear remains one of the outstanding mysteries of solar physics. We present a series of three-dimensional MHD anealastic simulations in rotating spherical shells that for the first time achieve a tachocline self-consistently, in which a dynamo operates within both the convection zone and underlying stable region. With the introduction of a small, random seed magnetic field to a hydrodynamic progenitor, the initially differentially rotating radiative interior is forced into solid-body rotation by a convectively excited dynamo, and afterward is maintained for centuries-long timescales. The overall result is similar in spirit to one of the &ldquo;main contenders&rdquo; for tachocline confinement&mdash;Gough and McIntyre (1998)&mdash;in which a primordial magnetic field stops the inward radiative spreading of the differential rotation. However, these new simulations using the Rayleigh code make no assumptions about the Sun&rsquo;s fossil interior magnetic field. They thus offer a possibly more realistic magnetic confinement scenario for the tachocline that is here shown to be achieved by a fully nonlinear MHD convective dynamo operating in the solar interior.</p>", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "creator": [
    {
      "affiliation": "JILA & Dept. Astrophysical and Planetary Sciences, University of Colorado Boulder", 
      "@id": "https://orcid.org/0000-0001-9001-6118", 
      "@type": "Person", 
      "name": "Matilsky, Loren Isaac"
    }, 
    {
      "affiliation": "JILA & Dept. Astrophysical and Planetary Sciences, University of Colorado Boulder", 
      "@id": "https://orcid.org/0000-0002-3125-4463", 
      "@type": "Person", 
      "name": "Toomre, Juri"
    }
  ], 
  "url": "https://zenodo.org/record/4568544", 
  "datePublished": "2021-02-27", 
  "keywords": [
    "The Sun and the Heliosphere; Solar dynamo; solar rotation; solar convection; magnetohydrodynamics; helioseismology"
  ], 
  "version": "Made many errors in version 2 :-(", 
  "@type": "MediaObject", 
  "contributor": [
    {
      "@type": "Person", 
      "name": "Wolk, Scott"
    }
  ], 
  "@context": "https://schema.org/", 
  "identifier": "https://doi.org/10.5281/zenodo.4568544", 
  "@id": "https://doi.org/10.5281/zenodo.4568544", 
  "workFeatured": {
    "url": "http://coolstars20.cfa.harvard.edu/cs20half", 
    "alternateName": "CS20.5", 
    "location": "virtually anywhere", 
    "@type": "Event", 
    "name": "The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun"
  }, 
  "name": "Building and maintaining a solar tachocline through convective dynamo action"
}
67
61
views
downloads
All versions This version
Views 6745
Downloads 6149
Data volume 825.6 MB619.4 MB
Unique views 4836
Unique downloads 4841

Share

Cite as