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Imaging Spectroscopy of Flows in Active Regions

Published online by Cambridge University Press:  12 April 2016

P. Mein  and
N. Mein
P. Mein
Affiliation:
Observatoire de Paris, Section de Meudon, F92195 MeudonCedex
N. Mein
Affiliation:
Observatoire de Paris, Section de Meudon, F92195 MeudonCedex

Abstract

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We use imaging spectroscopy from the MSDP of the VTT telescope in Tenerife (collaboration Paris-Meudon Observatory and Kiepenheuer Institut) to analyse Doppler velocities of arch filaments in Hα and NαD1. The geometry of the magnetic loops is deduced from perspective effects with a simple dynamical model. Velocities are correlated in both lines.

Further results are expected from simultaneous observations with other instruments (SVST of La Palma and Huairou magnetograph).

Type
Session 9. Convections and Oscillation in Active Regions
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 542 - 544
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Alissandrakis, C.E., Tsiropoula, G., Mein, P. 1990, Astron. Astrophys. 230, 200.Google Scholar
Mein, P. 1991, Astron. Astrophys. 248, 669.Google Scholar