Chromospheric evaporation in a two-ribbon flare

Details Chromospheric evaporation in a two-ribbon flare Chromospheric evaporation in a two-ribbon flare

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..561c&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

Sun: Activity, Sun: Flares, Sun: Atmospheric Motions

Scientific paper

We present simultaneous, spatially and temporally resolved chromospheric, transition region and coronal observations of a small eruptive flare studied throughout its whole development. We show that strong and co-spatial plasma motions, oppositely directed in the chromosphere (downflows) and in upper atmospheric layers (upflows), develop at the onset of the flare. For the first time, we prove that such oppositely directed flows originate from the same flaring kernels in different atmospheric layers. Using realistic values for the plasma parameters in the flaring loop, we also estimate a balance between the upward and downward momenta. Our observations confirm in a very convincing way the scenario of chromospheric evaporation predicted in theoretical models of flares.

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