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arXiv · 2008.10780

High-contrast H$\alpha$ 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
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Abstract

We present current status of H$\alpha$ 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 detecting a ring-like feature around omi Cet and the H$\alpha$ 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 $\sim10^{-3}-5\times10^{-4}$ at $0.3^{\prime\prime}$, which is comparable to other H$\alpha$ high-contrast imaging instruments in the southern hemisphere such as VLT/SPHERE, VLT/MUSE, and MagAO. Subaru/VAMPIRES provides great opportunities for H$\alpha$ high-contrast imaging for northern hemisphere targets.

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Taichi Uyama, Barnaby Norris, Nemanja Jovanovic, Julien Lozi, Peter Tuthill, Olivier Guyon, Tomoyuki Kudo, Jun Hashimoto, Motohide Tamura, Frantz Martinache. 2020-08-25. High-contrast H$\alpha$ imaging with Subaru/SCExAO+VAMPIRES. https://arxiv.org/abs/2008.10780

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