TY - JOUR
T1 - Multiband Imaging of the HD 36546 Debris Disk
T2 - A Refined View from SCExAO/CHARIS
AU - Lawson, Kellen
AU - Currie, Thayne
AU - Wisniewski, John P.
AU - Tamura, Motohide
AU - Augereau, Jean Charles
AU - Brandt, Timothy D.
AU - Guyon, Olivier
AU - Kasdin, N. Jeremy
AU - Groff, Tyler D.
AU - Lozi, Julien
AU - Deo, Vincent
AU - Vievard, Sebastien
AU - Chilcote, Jeffrey
AU - Jovanovic, Nemanja
AU - Martinache, Frantz
AU - Skaf, Nour
AU - Henning, Thomas
AU - Knapp, Gillian
AU - Kwon, Jungmi
AU - McElwain, Michael W.
AU - Pyo, Tae Soo
AU - Sitko, Michael L.
AU - Uyama, Taichi
AU - Wagner, Kevin
N1 - Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved..
PY - 2021/12/1
Y1 - 2021/12/1
N2 - We present the first multiwavelength (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 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 rproj ∼ 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 submicron-sized or highly porous grains. Through detailed modeling adopting a Hong scattering phase function (SPF), instead of the more common Henyey-Greenstein function, and using the differential evolution optimization algorithm, we provide an updated schematic of HD 36546's disk. The disk has a shallow radial dust density profile (α in ≈ 1.0 and α out ≈ -1.5), a fiducial radius of r 0 ≈ 82.7 au, an inclination of i ≈ 79. 1, and a position angle of PA ≈ 80. 1. Through spine tracing, we find a spine that is consistent with our modeling, but also with a "swept-back wing"geometry. Finally, we provide constraints on companions, including limiting a companion responsible for a marginal Hipparcos-Gaia acceleration to a projected separation of ≲0.″2 and to a minimum mass of ≲11 M Jup.
AB - We present the first multiwavelength (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 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 rproj ∼ 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 submicron-sized or highly porous grains. Through detailed modeling adopting a Hong scattering phase function (SPF), instead of the more common Henyey-Greenstein function, and using the differential evolution optimization algorithm, we provide an updated schematic of HD 36546's disk. The disk has a shallow radial dust density profile (α in ≈ 1.0 and α out ≈ -1.5), a fiducial radius of r 0 ≈ 82.7 au, an inclination of i ≈ 79. 1, and a position angle of PA ≈ 80. 1. Through spine tracing, we find a spine that is consistent with our modeling, but also with a "swept-back wing"geometry. Finally, we provide constraints on companions, including limiting a companion responsible for a marginal Hipparcos-Gaia acceleration to a projected separation of ≲0.″2 and to a minimum mass of ≲11 M Jup.
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U2 - 10.3847/1538-3881/ac2823
DO - 10.3847/1538-3881/ac2823
M3 - Article
AN - SCOPUS:85122570457
SN - 0004-6256
VL - 162
JO - Astronomical Journal
JF - Astronomical Journal
IS - 6
M1 - 293
ER -