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We report the development of the visored shutter structure for astronomical instrument and the electrostatic operation in a 140K cryogenic environment without thermo-mechanical failure.
We report a new structure of electrostatically addressable and latchable multi-slit shutter array for the astronomical spectrograph with an improved optical and electromechanical performance using the electroplated visors.
We present the discovery of a large‐scale structure of emission‐line galaxies at redshift z= 4.86 behind a massive cluster of galaxies, A1689. Previous spectroscopic observations of a galaxy, A1689−7.1 at z= 4.87, near this structure, revealed a possible overdense region of intergalactic medium (IGM) around the galaxy, which extends at least ∼80 comoving Mpc along the line of sight. In order to investigate...
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