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The Observation and Study of Two Prominence Events in the Infrared

Published online by Cambridge University Press:  13 May 2016

W. D. Cao ,
B. X. Ye  and
W. Livingston
W. D. Cao
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
B. X. Ye
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012, China
W. Livingston
Affiliation:
National Solar Observatory, P. O. Box 26732, Tucson, AZ 85726, U.S.A.

Abstract

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This paper reports the first extremely near infrared observation of two prominence events on Jan. 8, 1999 and Feb. 9, 1999 at H Pfund β (46525Å) and H Bracket α (40512Å) using the McMath Telescope. We scanned the spectrograph slit across the prominences parallel to the limb to obtain three-dimensional data cubes (two spatial dimensions and one spectral dimension). By fitting these observed lines, we can directly determine some important physical parameters such as Doppler width (ΔλD), the optical thickness at line center (τΔ0), and the line displacement (Δλ0). Combined with simultaneous observation of Balmer Hα, Hβ, and Ca K lines, the new results of structure and dynamics of limb prominence is presented. These results imply that these infrared lines can penetrate through the prominence and become a potential probe and tool, while Hα and Hβ sense the prominence skin only.

Type
Session III: Active Region Structure and Dynamics
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 257 - 259
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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