Abstract
We present the current status of Hα high-contrast imaging observations with Subaru/Subaru Coronagraphic Extreme Adaptive Optics + 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 a1/410-3 to 5 × 10-4 at 0.3″, which is comparable to other Hα high-contrast imaging instruments in the Southern Hemisphere such as very large telescope (VLT)/spectro-polarimetric high-contrast exoplanet research, VLT/MUSE, and Magellan AO. Current wavefront sensing and adaptive optics correction at optical wavelengths empirically depend on airmass, and Subaru/VAMPIRES provide great opportunities for Hα high-contrast imaging for Northern Hemisphere targets.
Original language | English (US) |
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Article number | 045004 |
Journal | Journal of Astronomical Telescopes, Instruments, and Systems |
Volume | 6 |
Issue number | 4 |
DOIs | |
State | Published - Oct 1 2020 |
Keywords
- H α
- data reduction
- exoplanet
- high contrast
- optics
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Control and Systems Engineering
- Instrumentation
- Astronomy and Astrophysics
- Mechanical Engineering
- Space and Planetary Science