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9 November 2020 High-contrast Hα imaging with Subaru/SCExAO + VAMPIRES
Taichi Uyama, Barnaby Norris, Nemanja Jovanovic, Julien Lozi, Peter G. Tuthill, Olivier Guyon, Tomoyuki Kudo, Jun Hashimoto, Motohide Tamura, Frantz Martinache
Author Affiliations +
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 ∼10  −  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.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
Taichi Uyama, Barnaby Norris, Nemanja Jovanovic, Julien Lozi, Peter G. Tuthill, Olivier Guyon, Tomoyuki Kudo, Jun Hashimoto, Motohide Tamura, and Frantz Martinache "High-contrast Hα imaging with Subaru/SCExAO + VAMPIRES," Journal of Astronomical Telescopes, Instruments, and Systems 6(4), 045004 (9 November 2020). https://doi.org/10.1117/1.JATIS.6.4.045004
Received: 28 May 2020; Accepted: 19 October 2020; Published: 9 November 2020
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CITATIONS
Cited by 7 scholarly publications.
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KEYWORDS
Adaptive optics

Point spread functions

Stars

Optical filters

Signal to noise ratio

Astronomy

Near infrared

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