Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...731l..18m&link_type=abstract
The Astrophysical Journal Letters, Volume 731, Issue 1, article id. L18 (2011).
Astronomy and Astrophysics
Astronomy
4
Sun: Activity, Sun: Chromosphere, Sun: Corona, Sun: Heliosphere, Sun: Magnetic Topology, Sun: Surface Magnetism
Scientific paper
From Hinode observations of solar X-ray jets, Type-II spicules, and granule-size emerging bipolar magnetic fields in quiet regions and coronal holes, we advocate a scenario for powering coronal heating and the solar wind. In this scenario, Type-II spicules and Alfvén waves are generated by the granule-size emerging bipoles (EBs) in the manner of the generation of X-ray jets by larger magnetic bipoles. From observations and this scenario, we estimate that Type-II spicules and their co-generated Alfvén waves carry into the corona an area-average flux of mechanical energy of ~7 × 105 erg cm-2 s-1. This is enough to power the corona and solar wind in quiet regions and coronal holes, and therefore indicates that the granule-size EBs are the main engines that generate and sustain the entire heliosphere.
Cirtain Jonathan W.
Falconer David Allen
Moore Ronald L.
Sterling Alphonse C.
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