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A compact dopplergraph/magnetograph suitable for space-based measurements of solar oscillations and magnetic fields |
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| Authors: | Edward J Rhodes Alessandro Cacciani Steven Tomczyk Roger K Ulrich Jacques Blamont Robert F Howard Philip Dumont Edward J Smith |
| Institution: | 1. Department of Astronomy, University of Southern California, Los Angeles, California, USA;7. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA;71. Dipartimento di Fisica dell''Universita “La Sapienza,” Rome, Italy;2. Department of Astronomy, University of California at Los Angeles, Los Angeles, California, USA;3. Service du Aeronomie de CNRS, Verrières-le-Buisson, France;4. Mt. Wilson and Las Campanas Observatories, Pasadena, California, USA |
| Abstract: | A compact Dopplergraph/magnetograph placed in a continuous solar-viewing orbit will allow us to make major advancements in our understanding of solar internal structure and dynamics. An international program is currently being conducted at JPL and Mt. Wilson to develop such an instrument. By combining a unique magneto-optical resonance filter with CID and CCD cameras we have been able to obtain full- and partial-disk Dopplergrams and magnetograms. Time series of the velocity images are converted into k-ω power spectra which show clear- the solar nonradial p-mode oscillations. Magnetograms suitable for studying the long-term evolution of solar active regions have also been obtained with this instrument. A flight instrument based on this concept is being studied for possible inclusion in the SOHO mission. |
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