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Subaru SCExAO First-Light Direct Imaging of a Young Debris Disk around HD 36546We present H-band scattered light imaging of a bright debris disk around the A0 star HD 36546 obtained from the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system with data recorded by the HiCIAO camera using the vector vortex coronagraph. SCExAO traces the disk from r approximately 0 3 to r approximately 0".3 to r approximately 1" (34-114 au). The disk is oriented in a near east west direction (PA approximately 75deg), is inclined by I approximately 70deg-75deg, and is strongly forward-scattering(g greater than 0.5). It is an extended disk rather than a sharp ring; a second, diffuse dust population extends from the disks eastern side. While HD 36546 intrinsic properties are consistent with a wide age range (t approximately 1-250 Myr), its kinematics and analysis of coeval stars suggest a young age (310 Myr) and a possible connection to Taurus-Aurigas star formation history. SCExAOs planet-to-star contrast ratios are comparable to the first-light Gemini Planet Imager contrasts; for an age of 10 Myr, we rule out planets with masses comparable to HR 8799 b beyond a projected separation of 23 au. A massive icy planetesimal disk or an unseen super-Jovian planet at r greater than 20 au may explain the disks visibility. The HD 36546 debris disk may be the youngest debris disk yet imaged, is the first newly identified object from the now-operational SCExAO extreme AO system, is ideally suited for spectroscopic follow-up with SCExAO/CHARIS in 2017, and may be a key probe of icy planet formation and planet disk interactions.
Document ID
20170007790
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Currie, Thayne
(National Astronomical Observatory Hilo, HI, United States)
Guyon, Olivier
(National Astronomical Observatory Hilo, HI, United States)
Tamura, Motohide
(Graduate Univ. for Advanced Studies Japan)
Kudo, Tomoyuki
(National Astronomical Observatory Hilo, HI, United States)
Jovanovic, Nemanja
(MacQuarie Univ. Australia)
Lozi, Julien
(National Astronomical Observatory Hilo, HI, United States)
Schlieder, Joshua E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Brandt, TImothy D.
(Institute for Advanced Study Princeton, NJ, United States)
Kuhn, Jonasa
(Eidgenoessische Technische Hochschule Zurich, Switzerland)
Serabyn, Eugene
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Janson, Markus
(Stockholm Univ. Sweden)
Carson, Joseph
(Charleston Coll. Charleston, SC, United States)
Groff, Tyler
(Princeton Univ. Princeton, NJ, United States)
Kasdin, N. Jeremy
(Princeton Univ. Princeton, NJ, United States)
McElwain, Michael W.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Singh, Garima
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Uyama, Taichi
(Tokyo Univ. Japan)
Kuzuhara, Masayuki
(National Inst. of Natural Sciences Tokyo, Japan)
Akiyama, Eiji
(National Astronomical Observatory Tokyo, Japan)
Grady, Carol
(Eureka Scientific, Inc. Oakland, CA, United States)
Hayashi, Saeko
(National Astronomical Observatory Hilo, HI, United States)
Knapp, Gillian
(Princeton Univ. Princeton, NJ, United States)
Kwon, Jung-Mi
(Japan Aerospace Exploration Agency Kanagawa, Japan)
Oh, Daehyeon
(National Meteorological Satellite Center Chungbuk, Korea, Republic of)
Wisniewski, John
(Oklahoma Univ. Norman, OK, United States)
Sitko, Michael
(Cincinnati Univ. OH, United States)
Yang, Yi
(Graduate Univ. for Advanced Studies Japan)
Date Acquired
August 17, 2017
Publication Date
February 10, 2017
Publication Information
Publication: The Astrophysical Journal Letters
Publisher: The American Astronomical Society
Volume: 836
Issue: 1
ISSN: 2041-8205
e-ISSN: 2041-8213
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN45673
Funding Number(s)
CONTRACT_GRANT: NNG16PX45C
Distribution Limits
Public
Copyright
Other
Keywords
Subaru Coronagraphic Extreme Adaptive Optics (SCExAO)

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