Small-Scale Hα Dynamic Features Supported by Chromospheric Magnetic Reconnection

Astronomy and Astrophysics – Astronomy

Scientific paper

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Small-Scale Hα Dynamic Features, Chromospheric Magnetic Reconnection

Scientific paper

In the present study, we have investigated morphology and evolution of small-scale Hα dynamic features on the quiet sun by analyzing video magnetograms and high resolution Hα images simultaneously taken for 5 hours at Big Bear Solar Observatory on April 18, 1997. From comparisons between time sequential longitudinal magnetograms and Hα images covering 150''×150'', several small-scale Hα dynamic features have been observed at a site of magnetic flux cancellation. A close relationship between such features and cancelling magnetic fluxes has been revealed temporarily and spatially. Our results support that material injection by chromospheric magnetic reconnection may be essential in supporting numerous small-scale Hα dynamical absorption features, being in line with recent observational studies showing that material injection by chromospheric magnetic reconnection is essential for the formation of solar filaments.

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