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Multiband Imaging of the HD 36546 Debris Disk: A Refined View from SCExAO/CHARIS

Lawson, Kellen and Currie, Thayne and Wisniewski, John P. and Tamura, Motohide and Augereau, Jean-Charles and Brandt, Timothy D. and Guyon, Olivier and Kasdin, N. Jeremy and Groff, Tyler D. and Lozi, Julien and Deo, Vincent and Vievard, Sebastien and Chilcote, Jeffrey and Jovanovic, Nemanja and Martinache, Frantz and Skaf, Nour and Henning, Thomas and Knapp, Gillian and Kwon, Jungmi and McElwain, Michael W. and Pyo, Tae-Soo and Sitko, Michael L. and Uyama, Taichi and Wagner, Kevin (2021) Multiband Imaging of the HD 36546 Debris Disk: A Refined View from SCExAO/CHARIS. Astronomical Journal, 162 (6). Art. No. 293. ISSN 0004-6256. doi:10.3847/1538-3881/ac2823.

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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 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 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 r₀ ≈ 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).

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Lawson, Kellen0000-0002-6964-8732
Currie, Thayne0000-0002-7405-3119
Wisniewski, John P.0000-0001-9209-1808
Tamura, Motohide0000-0002-6510-0681
Augereau, Jean-Charles0000-0002-2725-6415
Brandt, Timothy D.0000-0003-2630-8073
Guyon, Olivier0000-0002-1097-9908
Kasdin, N. Jeremy0000-0002-6963-7486
Groff, Tyler D.0000-0001-5978-3247
Lozi, Julien0000-0002-3047-1845
Deo, Vincent0000-0003-4514-7906
Vievard, Sebastien0000-0003-4018-2569
Chilcote, Jeffrey0000-0001-6305-7272
Jovanovic, Nemanja0000-0001-5213-6207
Martinache, Frantz0000-0003-1180-4138
Skaf, Nour0000-0002-9372-5056
Henning, Thomas0000-0002-1493-300X
Knapp, Gillian0000-0002-9259-1164
Kwon, Jungmi0000-0003-2815-7774
McElwain, Michael W.0000-0003-0241-8956
Pyo, Tae-Soo0000-0002-3273-0804
Sitko, Michael L.0000-0003-1799-1755
Uyama, Taichi0000-0002-6879-3030
Wagner, Kevin0000-0002-4309-6343
Additional Information:© 2021. The American Astronomical Society. Received 2021 May 25; revised 2021 September 2; accepted 2021 September 17; published 2021 December 7. We thank our referee, whose comments helped us to improve both the content and clarity of this manuscript. This research is based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. We are honored and grateful for the opportunity of observing the Universe from Maunakea, which has cultural, historical, and natural significance in Hawaii. We wish to acknowledge the critical importance of the current and recent Subaru telescope operators, daycrew, computer support, and office staff employees. Their expertize, ingenuity, and dedication is indispensable to the continued successful operation of Subaru. The development of SCExAO was supported by the Japan Society for the Promotion of Science (Grant-in-Aid for Research #23340051, #26220704, #23103002, #19H00703 & #19H00695), the Astrobiology Center of the National Institutes of Natural Sciences, Japan, the Mt Cuba Foundation and the director's contingency fund at Subaru Telescope. We acknowledge funding support from the NASA XRP program via grants 80NSSC20K0252 and NNX17AF88G. T.C. was supported by a NASA Senior Postdoctoral Fellowship. M.T. is supported by JSPS KAKENHI grant Nos.18H05442, 15H02063, and 22000005. K.W. acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51472.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)23340051
Japan Society for the Promotion of Science (JSPS)26220704
Japan Society for the Promotion of Science (JSPS)23103002
Japan Society for the Promotion of Science (JSPS)19H00703
Japan Society for the Promotion of Science (JSPS)19H00695
National Institutes of Natural Sciences of JapanUNSPECIFIED
Mt. Cuba Astronomical FoundationUNSPECIFIED
Subaru TelescopeUNSPECIFIED
NASA Postdoctoral ProgramUNSPECIFIED
Japan Society for the Promotion of Science (JSPS)18H05442
Japan Society for the Promotion of Science (JSPS)15H02063
Japan Society for the Promotion of Science (JSPS)22000005
NASA Hubble FellowshipHST-HF2-51472.001-A
Subject Keywords:Debris disks; Circumstellar disks; T Tauri stars; Infrared astronomy
Issue or Number:6
Classification Code:Unified Astronomy Thesaurus concepts: Debris disks (363); Circumstellar disks (235); T Tauri stars (1681); Infrared astronomy (786)
Record Number:CaltechAUTHORS:20211214-16592000
Persistent URL:
Official Citation:Kellen Lawson et al 2021 AJ 162 293
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112452
Deposited By: George Porter
Deposited On:15 Dec 2021 23:56
Last Modified:15 Dec 2021 23:56

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