Bibcode
Kucera, Therese A.; Knizhnik, K.; Lopez Ariste, A.; Luna-Bennasar, M.; Schmieder, B.; Toot, D.
Referencia bibliográfica
American Astronomical Society, SPD meeting #44, #104.03
Advertised on:
7
2013
Número de citas
0
Número de citas referidas
0
Descripción
We have observed a quiescent prominence with the Hinode Solar Optical
Telescope (SOT, in Ca II and H-alpha lines), Sacramento Peak Observatory
(in H-alpha, H-beta and Sodium-D lines), and THEMIS/MTR
(Télescope Héliographique pour l'Étude du
Magnétisme et des Instabilités Solaires/MulTi Raies,
providing vector magnetograms), and SDO/AIA (Solar Dynamics Observatory
Atmospheric Imaging Assembly, in EUV) over a 4 hour period on 2012
October 10. The small fields of view of SOT, Sac Peak and THEMIS are
centered on a large pillar-like prominence footpoint extending towards
the surface. This feature appears in the larger field of view of the 304
Å band, as a large, quasi-vertical column with material flowing
horizontally on each side. The THEMIS/MTR data indicate that the
magnetic field in the pillar is essentially horizontal and the
observations in the optical wavelengths show a large number of
horizontally aligned features on a much smaller scale than the pillar as
a whole. The data are consistent with a model of cool prominence plasma
trapped in the dips of horizontal field lines. The SOT and Sac Peak data
show what appear to be moving wave pulses. These pulses, which include a
Doppler signature, move vertically, perpendicular to the field
direction, along quasi-vertical columns. The pulses have a velocity of
propagation of about 10 km/s, a period about 260 sec, and a wavelength
around 2000 km. We interpret these waves in terms of fast magneto-sonic
waves and discuss possible wave drivers.