High-contrast H α 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

doi:10.1117/1.JATIS.6.4.045004

High-contrast H α 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

Optical Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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)
Article number	045004
Journal	Journal of Astronomical Telescopes, Instruments, and Systems
Volume	6
Issue number	4
DOIs	https://doi.org/10.1117/1.JATIS.6.4.045004
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

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10.1117/1.JATIS.6.4.045004

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title = "High-contrast H α imaging with Subaru/SCExAO + VAMPIRES",

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.",

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

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T1 - High-contrast H α imaging with Subaru/SCExAO + VAMPIRES

AU - Uyama, Taichi

AU - Norris, Barnaby

AU - Jovanovic, Nemanja

AU - Lozi, Julien

AU - Tuthill, Peter

AU - Guyon, Olivier

AU - Kudo, Tomoyuki

AU - Hashimoto, Jun

AU - Tamura, Motohide

AU - Martinache, Frantz

N1 - Publisher Copyright: © 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.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - 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.

AB - 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.

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KW - high contrast

KW - optics

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High-contrast H α imaging with Subaru/SCExAO + VAMPIRES

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