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Portable adaptive optics for exoplanet imaging
Zhu YT(朱永田); Dou JP(窦江培); Zhang X(张熙); Zhao G(赵刚); Guo J(郭晶)
2021-10
发表期刊Research in As tronomy and As trophysics
卷号21期号:4页码:34-42
摘要

The portable adaptive optics(PAO) device is a low-cost and compact system,designed for 4-meter class telescopes that have no adaptive optics(AO) system,because of the physical space limitation at the Nasmyth or Cassegrain focus and the historically high cost of conventional AO.The initial scientific observations of the PAO are focused on the direct imaging of exoplanets and sub-stellar companions.This paper discusses the concept of PAO and the associated high-contrast imaging performance in our recent observational runs.PAO deliver a Strehl ratio better than 60% in H band under median seeing conditions of 1 ".Combined with our dedicated image rotation and subtraction(IRS) technique and the optimized IRS(O-IRS) algorithm,the averaged contrast ratio for a 5 ≤Vmag≤9 primary star is 1.3×10-5 and3.3×10-6 at angular distance of 0.36" with exposure time of 7 minutes and 2 hours,respectively.PAO has successfully revealed the known exoplanet of κ And b in our recent observation with the 3.5-meter ARC telescope at Apache Point Observatory.We have performed the associated astrometry and photometry analysis of the recovered κ And b planet,which gives a projected separation of 0.98 "±0.05",a position angle of 51.1°±0.5° and a mass of 10.15-1.255 +2.19 MJup.These results demonstrate that PAO can be used for direct imaging of exoplanets with medium-sized telescopes.

关键词stars: imaging instrumentation: adaptive optics instrumentation: high angular resolution methods: observational techniques: image processing
学科领域天文技术与方法
语种英语
文献类型期刊论文
条目标识符http://ir.niaot.ac.cn/handle/114a32/1949
专题期刊论文
作者单位南京天文光学技术研究所
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Zhu YT,Dou JP,Zhang X,et al. Portable adaptive optics for exoplanet imaging[J]. Research in As tronomy and As trophysics,2021,21(4):34-42.
APA Zhu YT,Dou JP,Zhang X,Zhao G,&Guo J.(2021).Portable adaptive optics for exoplanet imaging.Research in As tronomy and As trophysics,21(4),34-42.
MLA Zhu YT,et al."Portable adaptive optics for exoplanet imaging".Research in As tronomy and As trophysics 21.4(2021):34-42.
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