We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExA0 instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 A/D away from the diffraction-limited PSF in H-band (-1.6 m) images collected at 1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we would like to image reflected-light exoplanets, which necessitates a fast speckle control loop. Based on our measurements, we calculate the parameters of an optimized control loop that would enable such observations.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/622013 |
| Date | 26 July 2016 |
| Creators | Goebel, Sean B., Guyon, Olivier, Hall, Donald N. B., Jovanovic, Nemanja, Atkinson, Dani E. |
| Contributors | Univ Arizona, Steward Observ, Univ Arizona, Coll Opt Sci, Univ. of Hawaii (United States), Subaru Telescope, National Astronomical Observatory of Japan (United States), Univ. of Hawaii (United States), Subaru Telescope, National Astronomical Observatory of Japan (United States), Univ. of Hawaii (United States) |
| Publisher | SPIE-INT SOC OPTICAL ENGINEERING |
| Source Sets | University of Arizona |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | © 2016 SPIE |
| Relation | http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2231926 |
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