He I 584 Å line in the solar spectrum.

By: Contributor(s): Series: NCAR Cooperative Thesis ; 174Boulder, CO : National Center for Atmospheric Research (NCAR), 2002Description: iv, 106 p. : ill. ; 28 cmContent type:
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Media type:
  • unmediated
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Subject(s): Dissertation note: Thesis (M.S.)--Lund University, 2002. Summary: This thesis tries to look into the formation of the neutral helium resonance line in the solar EUV spectrum. A time dependent approach is taken when dealing with the helium emission. In the beginning, the idea was to analyze some observations and put helium into context with other lines. In the end, it proved to be a difficult task, and the scope of this thesis broadened. First a brief review of the Sun and its atmosphere is given in chapter 1. The existing observational facts and models for the helium line formation will are discussed in chapters 2 and 3. Chapter 4 focuses on time series observations done with the SUMER instrument. In chapter 5 two of the models for helium line formation reviewed earlier are explored. Finally, chapter 6 draws conclusions from the observations and calculations.
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Item type Current library Call number Copy number Status Date due Barcode Item holds
BOOK BOOK NCAR Library Mesa Lab QC455 .P548 2002 1 Available 50583010294241
Total holds: 0

"30 August 2002"--Cover.

Thesis (M.S.)--Lund University, 2002.

Includes bibliographical references (p. [107-109]) and abstract.

This thesis tries to look into the formation of the neutral helium resonance line in the solar EUV spectrum. A time dependent approach is taken when dealing with the helium emission. In the beginning, the idea was to analyze some observations and put helium into context with other lines. In the end, it proved to be a difficult task, and the scope of this thesis broadened. First a brief review of the Sun and its atmosphere is given in chapter 1. The existing observational facts and models for the helium line formation will are discussed in chapters 2 and 3. Chapter 4 focuses on time series observations done with the SUMER instrument. In chapter 5 two of the models for helium line formation reviewed earlier are explored. Finally, chapter 6 draws conclusions from the observations and calculations.

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