Abstract
We present the observational results on chromospheric spicules obtained at the Sayan observatory 50 cm coronograph. To investigate the evolution of chromospheric spicules, we analysed spicule spectra of strong chromospheric lines measured simultaneously at three altitudes above the solar limb during 5–60 min with a time resolution of 10 to 20 s. The spatial resolution was better than 1”, and the spectral resolution was 0.03Å in λ 6563Å. The appearance of a spicule at a given altitude is preceded by an sharp increase in line-of-sight velocity and/or in line half-width at a lower level. Generally, the evolution has a non-monotonous impulsive character. Changes of line-of-sight velocities and other parameters of the line profile can be represented as the superposition of slow, evolutionary changes and fluctuations with periods of about 80 to 120 s. The amplitude of line-of-sight velocity fluctuations is 2–3 km/sec and tends to increase with height. By studying the phase delays of the fluctuations at different heights, we found that the propagation velocity exceeds 300 km S-l, and that the disturbances do not necessarily propagate upwards.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Athay, R.G., Holzer, T.E.: 1982, Astrophys. J., 255, 743.
Beckers, J.M.: 1972, Ann. Rev. of Astron. Astrophys., 10, 73.
Hazan, S.S., Keil, S.L.: 1984, Astrophys. J., 283, L.75.
Nikolsky, G.M., Sazanov, A.A.: 1967, Astron. zh., 44, 426.
Papushev, P.G.: 1980, Solar Phys., 68, 275.
Papushev, P.G.: 1985, Bulleten Abastumanskoi Astrojiz. Obzervat., 60, 75.
Papushev, P.G., Salakhutdinov, R.T.: 1989, Proceedings of the XIII Consultation Meeting on Solar Physics, 1, 263.
Papushev, P.G., Salakhutdinov, R.T.: 1990, Issledovaniya po geomagnetizmu, aeronomii i fizike Solntsa, 91, 194.
Pasachoff, J.M., Noyes, R.W. and Beckers J.M.: 1968, Solar Phys., 5, 131.
Withbroe, G.L.: 1983, Astrophys. J., 267, 825.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Papushev, P.G., Salakhutdinov, R.T. (1994). The Dynamics of Chromospheric Spicules. In: Fleck, B., Noci, G., Poletto, G. (eds) Mass Supply and Flows in the Solar Corona. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0930-7_7
Download citation
DOI: https://doi.org/10.1007/978-94-011-0930-7_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4401-1
Online ISBN: 978-94-011-0930-7
eBook Packages: Springer Book Archive