H alpha Surges and X-Ray Jets in AR 7260

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Abstract

We discuss nine events, observed simultaneously as jets in X-rays and surges in Hα, which are associated with moving magnetic bipoles. The X-ray jets share many features with those discovered by Yohkoh in active regions, emerging flux regions, and X-ray bright points (see paper by Shibata et al.); in particular, they originate near one end of a pair of small flaring loops. The Hα surges are adjacent to the X-ray jets. At the bases of these surges we observe both blueshifts (initially) and redshifts (1-2 minutes later). All the observed surges spin in a sense consistent with the relaxation of the twist stored in the magnetic fields of the moving magnetic bipoles. Newly discovered phenomena include footpoint convergence and moving-blueshift features. We develop a model of the role of magnetic reconnection in these events. This model explains the temporal and spatial relationship between the jets and surges, the role of the moving bipoles, the flaring X-ray loops and their converging Hα footpoints, the Hα moving-blueshift features, the direction and amount of spin of the surges, and the relative temporal development of the Hα redshifts and blueshifts.

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