On expansion of magnetic clouds in the solar wind

Details On expansion of magnetic clouds in the solar wind On expansion of magnetic clouds in the solar wind

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009astra...5...35v&link_type=abstract

Astrophysics and Space Sciences Transactions, Volume 5, Issue 1, 2009, pp.35-38

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

Magnetic clouds are supposed to be large interplanetary flux ropes propagating away from the Sun. Due to enhanced inner magnetic pressure, they expand during their travel. We have analyzed 21 magnetic clouds from Wind observations and fitted them by our model. Comparison of the time-dependent model with observations is shown for several cases with a detailed discussion. The model describes behavior of compared quantities satisfactorily. In addition to magnetic field vectors, also velocity vectors were modeled and it was found that radial velocity component behaves as expected. Analysis of velocity components put models under a more strict test and yields more confidence into models and derived magnetic cloud parameters.

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