Keck/OSIRIS Paβ High-contrast Imaging and Updated Constraints on PDS 70b

  title={Keck/OSIRIS Pa$\beta$ High-contrast Imaging and Updated Constraints on PDS 70b},
  author={Taichi Uyama and Chen Xie and Yuhiko Aoyama and Charles A. Beichman and Jun Hashimoto and Ruobing Dong and Yasuhiro Hasegawa and Masahiro Ikoma and Dimitri Mawet and Michael W. McElwain and Jean-Baptiste Ruffio and Kevin R. Wagner and Jason J. Wang and Yifan Zhou},
  journal={The Astronomical Journal},
  • T. Uyama, Chen Xie, +11 authors Yifan Zhou
  • Published 14 September 2021
  • Physics
  • The Astronomical Journal
We present a high-contrast imaging search for Paβ line emission from protoplanets in the PDS 70 system with Keck/OSIRIS integral field spectroscopy. We applied the high-resolution spectral differential imaging technique to the OSIRIS J-band data but did not detect the Paβ line at the level predicted using the parameters of Hashimoto et al. (2020). This lack of Paβ emission suggests the MUSE-based study may have overestimated the line width of Hα. We compared our Paβ detection limits with the… 
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