High-contrast Hα imaging with Subaru/SCExAO+VAMPIRES

Taichi Uyama, Barnaby Norris, Nemanja Jovanovic, Julien Lozi, Peter Tuthill, Olivier Guyon, Tomoyuki Kudo, Jun Hashimoto, Motohide Tamura, Frantz Martinache

Research output: Contribution to journalArticlepeer-review


We present current status of Hα high-contrast imaging observations with Subaru/SCExAO+VAMPIRES. Our adaptive optics correction at optical wavelengths in combination with (double) spectral differential imaging (SDI) and angular differential imaging (ADI) was capable of resolving a ring feature around omi Cet and detect the Hα counterpart of jet around RY Tau. We tested the post-processing by changing the order of ADI and SDI and both of the contrast limits achieved ∼ 103 − 5 × 104 at 0.3", which is comparable to other Hα high-contrast imaging instruments in the southern hemisphere such as VLT/SPHERE, VLT/MUSE, and MagAO. Current wavefront sensing and adaptive optics correction at optical wavelengths empirically depends on airmass and Subaru/VAMPIRES provides great opportunities for Hα high-contrast imaging for northern hemisphere targets.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Aug 24 2020


  • Data reduction
  • Exoplanet
  • High contrast
  • Optics

ASJC Scopus subject areas

  • General

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