Multiband imaging of the HD 36546 debris disk: a refined view from SCExAO/CHARIS

Abstract

We present the first multi-wavelength (near-infrared; 1.1 − 2.4 µm) imaging of HD 36546's debris disk, using the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system coupled with the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS). As a 3-10 Myr old T Tauri star, HD 36546 presents a rare opportunity to study a debris disk at very early stages. SCExAO/CHARIS imagery resolves the disk over angular separations of ρ ∼ 0. 25 − 1. 0 (projected separations of r proj ∼ 25 − 101 au) and enables the first spectrophotometric analysis of the disk. The disk's brightness appears symmetric between its eastern and western extents and it exhibits slightly blue near-infrared colors on average (e.g. J −K = −0.4 ± 0.1) -suggesting copious sub-micron sized or

The search for gas in debris discs: ALMA detection of CO gas in HD 36546

“…The outer region of the disc would be located further than 20 au, and corresponds to that imaged by Currie et al (2017), while the inner disc remains undetected in scattered light. A recent publication by Lawson et al (2021), reporting multiwavelength scattered light observations in the near-IR, provides a new morphological analysis of the disc, consistent with previous results, including this paper. Unfortunately, due to the original goal of the observations presented here (gas detection) the experimental design lacks the spatial resolution to detect any substructures in the disc.…”

“…Black circles mark other debris discs with detections in the literature numbered from 9 to 21(Moór et al 2017(Moór et al , 2019 Di Folco et al 2020). (170 au,Currie et al 2017;Lawson et al 2021) is not really significant, and might indicate a uniform grain size distribution in the disc. The orientation of the disc reported here is also compatible with the one reported inCurrie et al (2017);Lawson et al (…”