Development of high stability fiber optic spectrophotometric systems for study of solar/stellar magnetic activity

Details Development of high stability fiber optic spectrophotometric systems for study of solar/stellar magnetic activity Development of high stability fiber optic spectrophotometric systems for study of solar/stellar magnetic activity

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987psu..reptq....r&link_type=abstract

Final Report, 15 Jun. 1983 - 15 Jun. 1986 Pennsylvania State Univ., University Park. Dept. of Astronomy.

Physics

Optics

Coronagraphs, Fiber Optics, Magnetic Variations, Solar Activity, Solar Magnetic Field, Spectrophotometry, Sunspot Cycle, Differential Geometry, Dynamic Characteristics, Efficiency, Input, Life (Durability), Morphology, Rates (Per Time), Spatial Distribution, Stellar Rotation

Scientific paper

A program to study magnetic activity cycles in solar-type stars, including the Sun, is described. The goal is to establish the relationships between a star's magnetic cycle morphology (i.e., amplitude, period, shape, regularity, etc.) and its age, rotation rate, and if possible, differential rotation rate, for a variety of solar like stars. Basic empirical input will be provided for the construction of a viable dynamical dynamo theory for the Sun and the stars, leading to a deeper understanding of the ultimate origins of solar and stellar magnetism. Only when a realistic theory of magnetic field generation is available can one understand fully the physics of magnetic activity, which manifests itself on all temporal and spatial scales, from transients such as flares to long-lived structures such as quiescent prominences, from flux-tubes at the limit of resolution to complex groups of sunspots. A critical first step in this effort was the development of an appropriate instrument. What follows describes an advanced-design, special-purpose, fiber fed spectrograph carefully optimized to make the required observations with maximum efficiency. This contract designs, fabricates and tests the breadboard instrument.

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