Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh13b1947s&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH13B-1947
Astronomy and Astrophysics
Astrophysics
[7507] Solar Physics, Astrophysics, And Astronomy / Chromosphere, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7529] Solar Physics, Astrophysics, And Astronomy / Photosphere, [7594] Solar Physics, Astrophysics, And Astronomy / Instruments And Techniques
Scientific paper
Simultaneous spectrographic observations over extended solar structures, at a high spatial resolution and temporal cadence, are important to track and understand the physics of transient phenomena such as Ellerman bombs, flare kernels, prominences/filaments and spicules. With two-dimensional (2-D) field spectral data, we can make monochromatic images at a given wavelength in a designed passband and line profile analysis to derive 2-D distribution of atmospheric parameters. One technique to produce a spectrum of each spatial elements in an extended two-dimensional field is to use a micro-lens array. Replacing a slit of a conventional spectrograph with a micro-lens array then helps to capture two-dimensionally distributed short spectra from 2-D field using additional optics inserted, a bandpass filter and a large format detector. For observations of magnetic field, we can add polarization modulator made of liquid crystal retarders which give a sequence of alternative orthogonal polarization states with time. We describe a design concept and limitations for observations with the micro-lens array spectrograph and an initial result applied for a few existing solar telescopes at NAOJ and Hida Observatory, Kyoto University.
Kobiki Toshihiko
Sano Issei
Shinoda Kazuhiko
Suematsu Yoshinori
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