Doppler shift oscillations in solar spicules
arXiv:0708.2057 · doi:10.1051/0004-6361:20077661
Abstract
Consecutive height series of Ha spectra in solar limb spicules taken on the 53 cm coronagraph of Abastumani Astrophysical Observatory at the heights of 3800-8700 km above the photosphere have been analyzed. The aim is to observe oscillatory phenomena in spicules and consequently to trace wave propagations through the chromosphere. The Discrete Fourier Transform analysis of Ha Doppler shift time series constructed from the observed spectra at each height is used. Doppler velocities of solar limb spicules show oscillations with periods of 20-55 and 75-110 s. There is also the clear evidence of 3-min oscillations at the observed heights. The oscillations can be caused by wave propagations in thin magnetic flux tubes anchored in the photosphere. We suggest the granulation as a possible source for the wave excitation. Observed waves can be used as a tool for spicule seismology; the magnetic field strength in spicules at the height of about 6000 km above the photosphere is estimated as 12-15 G.
7 pages, 8 figures, accepted in A&A
References in corpus (7)
- Observation of kink waves in solar spicules
- The Hanle and Zeeman Effects in Solar Spicules: A Novel Diagnostic Window on Chromospheric Magnetism
- Eclipse observations of high-frequency oscillations in active region coronal loops
- Observation of coronal loop torsional oscillation
- Torsional oscillations of longitudinally inhomogeneous coronal loops
- Swing wave-wave interaction: Coupling between fast magnetosonic and Alfv{é}n waves
- Dynamics of the solar chromosphere. V. High-frequency modulation in ultraviolet image sequences from TRACE
Cited by in corpus (48)
- Oscillations and waves in solar spicules
- Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: spectroscopic signatures of Alfvenic waves and recurring upflows
- Solar fine-scale structures. I. Spicules and other small-scale, jet-like events at the chromospheric level: observations and physical parameters
- Partially Ionized Plasmas in Astrophysics
- Transverse oscillations in chromospheric mottles
- Stability of rotating magnetized jets in the solar atmosphere. I. Kelvin-Helmholtz instability
- The Dynamics of Rapid Redshifted and Blueshifted Excursions in the Solar Halpha line
- Damping of Alfven waves in solar partially ionized plasmas: effect of neutral helium in multi-fluid approach
- Transverse Oscillations in Slender Ca II H Fibrils Observed with Sunrise/SuFI
- Characteristics of transverse waves in chromospheric mottles
- Torsional Alfvén waves in solar partially ionized plasma: effects of neutral helium and stratification
- Overdamped Alfven waves due to ion-neutral collisions in the solar chromosphere
- Kink waves in an active region dynamic fibril
- Propagation and dispersion of transverse wave trains in magnetic flux tubes
- Propagation of sausage soliton in the solar lower atmosphere observed by Hinode/SOT
- The Effects of Spatio-temporal Resolution on Deduced Spicule Properties
- Resonant Alfven waves in partially ionized plasmas of the solar atmosphere
- Height variation of the vector magnetic field in solar spicules
- Spicule Dynamics over Plage Region
- Kelvin-Helmholtz instability of kink waves in photospheric twisted flux tubes
- Radio seismology of the outer solar corona
- Pulse-driven nonlinear Alfvén waves and their role in the spectral line broadening
- Helical motion of magnetic flux tubes in the solar atmosphere
- Observation of standing kink waves in solar spicules
- Effect of partial ionization on wave propagation in solar magnetic flux tubes
- High--cadence observations of spicular-type events on the Sun
- Small-scale solar jet formation and their associated waves and instabilities
- Semi-empirical models of spicule from inversion of Ca II 8542 Å line
- The Possibility of Kelvin-Helmholtz Instability in Solar Spicules
- Observation of kink waves and their reconnection-like origin in solar spicules
- Inference of Magnetic Field in the Coronal Streamer Invoking Kink Wave Motions generated by Multiple EUV Waves
- Structure of the solar photosphere studied from the radiation hydrodynamics code ANTARES
- Propagating wave in active region-loops, located over the solar disk observed by the Interface Region Imaging Spectrograph
- A New Type of Jets in a Polar Limb of Solar Coronal Hole
- Phase mixing of propagating Alfven waves in a stratified atmosphere: Solar spicules
- Spectroscopic study of solar transition region oscillations in the quiet-Sun observed by IRIS using Si IV spectral line
- Dynamic kink instability and transverse motions of solar spicules
- Dynamics of Explosive Events by Interface Region Imaging Spectrograph
- Phase mixing of standing Alfven waves with shear flows in solar spicules
- Evidences to the pulse like origin of double spicules based on Hinode/SOT observations
- Observation of the period ratio P_1/P_2 of transversal oscillations in solar macro-spicules
- On the role of transition region on the Alfven wave phase mixing in solar spicules
- Non-linear damping of visco-resistive Alfven waves in solar spicules
- The period ratio P_1/P_2 of torsional Alfvén waves with steady flows in spicules
- Torsional Alfven waves and the period ratio P_1/P_2 in spicules
- Mode coupling in solar spicule oscillations
- Concurrent Kink and Sausage Waves in A Crescent Shaped Structure Over A Limb Prominence
- Transverse oscillations in solar spicules induced by propagating Alfvenic pulses