Books and Book Chapters
- Pevtsov, A.A., Berger, M.A., Nindos, A., Norton, A.A., van Driel-Gesztelyi, L.: 2014, “Magnetic Helicity, Tilt, and Twist”, Space Science Reviews, 186, issue 1, 285-324, DOI: 10.1007/s11214-014-0082-2
- Magnetic Helicity at the Sun, in Solar Wind and Magnetospheres; Vistas from X-Ray Observatories, Buechner, J. and Pevtsov, A.A. (Eds.), Advances in Space Research, Volume 32, Issue 10, 2003, (Pergamon).
- Magnetic Helicity in Space and Laboratory Plasmas, M. R. Brown, R. C. Canfield, A. A. Pevtsov (Eds.), 1999, (AGU).
- The NORDITA program on “Solar helicities in theory and observations: implications for space weather and dynamo theory“, Stockholm, Sweden, 4-29 March 2019
- Helicity Thinkshop 3, Tokyo, Japan, 19-23 November 2017
- Chapman Conference on Magnetic Helicity in Space and Laboratory Plasmas. Boulder, CO, USA, 1998, see book.
- 34th COSPAR SCIENTIFIC ASSEMBLY, Scientific Commission D, “Magnetic Helicity at Sun, in the Solar Wind and Magnetospheres”, Houston, TX, USA, 2002, see special issue
- XXVth IAU General Assembly, JD03: Magnetic Fields and Helicity in the Sun and Heliosphere, Sydney, Australia, 2003
Art and Helicity
Helicity in Solar Corona
Coronal observations from the Soft X-ray Telescope aboard the Yohkoh spacecraft provide a number of examples of sheared coronal structures in the shape of a forward or backward S. From our point of view these structures indicate electric currents flowing in the corona, whose direction determines the sense of the shear. A force-free field model gives a good example of that.
Here is a model linear force-free field with alpha > 0 (left) and alpha < 0 (rigth). Electric currents are parallel to the magnetic field vector for the positive alpha and antiparallel for the negative alpha. Further discussion of that may be found here