Comparison of photospheric current helicity and subsurface kinetic helicity

Details Comparison of photospheric current helicity and subsurface kinetic helicity Comparison of photospheric current helicity and subsurface kinetic helicity

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.394l..79g&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 394, Issue 1, pp. L79-L83.

Astronomy and Astrophysics

Astronomy

4

Sun: Activity, Sun: Magnetic Fields, Sun: Photosphere

Scientific paper

We make a comparison between photospheric current helicity and subsurface kinetic helicity in solar active regions. Four parameters are employed: average value of vertical component of current helicity density (), average force-free field factor and mean subsurface kinetic helicity (αv), which is denoted as two different parameters, <αv1> and <αv2>, according to different depths beneath the solar surface. A total of 38 active regions are investigated. The results show that the signs of and αave have a typical hemispheric distribution feature. In contrast, the sign of <αv1> presents the opposite feature to the above two parameters. For <αv2>, there is no obvious preponderance of the sign in each hemisphere as with the other three parameters. Although there is an opposite hemispheric preponderance between the signs of current helicity and that of kinetic helicity at 0-3 Mm beneath the solar surface, the uncertain correlations between and <αv1>, αave and <αv1>, and <αv2>, and αave and <αv2> (the correlation coefficients are -0.095, 0.118, -0.102 and -0.179, respectively) do not support that the photospheric current helicity has a cause and effect relation with the kinetic helicity at 0-12 Mm beneath the solar surface.

Affiliated with

Also associated with

No associations

Rating

Comparison of photospheric current helicity and subsurface kinetic helicity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparison of photospheric current helicity and subsurface kinetic helicity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of photospheric current helicity and subsurface kinetic helicity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1711586