The Evershed flow from simultaneous chromospheric and photospheric observations

Christopoulou, E.B. and Georgakilas, A.A. and Koutchmy, S. (2002) The Evershed flow from simultaneous chromospheric and photospheric observations. Il nuovo cimento C, 25 (5\6). pp. 587-593. ISSN 1826-9885

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We study the Evershed flow in the photosphere and the reverse Evershed flow inthe chromosphere giving emphasis to the temporal evolution of the phenomenon. Our results verify that the velocity of the Evershed flow has a maximum above the penumbra in the photosphere and well outside the penumbra in the chromosphere. We found a quasi-periodic behavior of the reverse Evershed flow in the chromosphere with period between10–15 min. We were not able to identify an obvious repetitive behavior in the photosphere, except from the propagation of the slow photospheric waves.

Item Type: Article
Additional Information: Paper presented at the International Meeting on THEMIS and the New Frontiers of Solar Atmosphere Dynamics, Rome, Italy, March 19-21, 2001.
Uncontrolled Keywords: Sunspots, faculae, plages ; Image processing (including source extraction) ; Conference proceedings
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 12 Mar 2020 14:39
Last Modified: 12 Mar 2020 14:39

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