Details

Autor(en) / Beteiligte

• SEKSE, D H
• VAN DER VOORT, L ROUPPE
• DE PONTIEU, B
• Scullion, E

Titel

INTERPLAY OF THREE KINDS OF MOTION IN THE DISK COUNTERPART OF TYPE II SPICULES: UPFLOW, TRANSVERSAL, AND TORSIONAL MOTIONS

Ist Teil von

• The Astrophysical journal, 2013-05, Vol.769 (1), p.1-11

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Recently, it was shown that the complex dynamical behavior of spicules has to be interpreted as the result of simultaneous action of three kinds of motion: (1) field aligned flows, (2) swaying motions, and (3) torsional motions. We use high-quality observations from the CRisp Imaging SpectroPolarimeter at the Swedish 1-m Solar Telescope to investigate signs of these different kinetic modes in spicules on the disk. Here we report the existence of similar absorption features in the red wing of the Ca II 8542 and H[alpha] lines: rapid red-shifted excursions (RREs). The fact that most RBEs and RREs are observed in isolation agrees with the idea that transversal swaying motion is another important kinetic mode. We find examples of transitions from RRE to RBE and vice versa. These transitions sometimes appear to propagate along the structure with speeds between 18 and 108 km s[sup -1] and can be interpreted as the sign of a transverse wave.