Protoplanetary disks; Coronagraphic imaging; 1300; 313; Astrophysics; - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar
Abstract :
[en] We present Subaru/SCExAO+Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) broadband (JHK-band) integral field spectroscopy of HD 34700 A. CHARIS data recover HD 34700 A's disk ring and confirm multiple spirals discovered by Monnier et al. We set limits on substellar companions of ∼12 M<SUB>Jup</SUB> at 0"3 (in the ring gap) and ∼5 M<SUB>Jup</SUB> at 0"75 (outside the ring). The data reveal darkening effects on the ring and spiral, although we do not identify the origin of each feature such as shadows or physical features related to the outer spirals. Geometric albedos converted from the surface brightness suggest a greater scale height and/or prominently abundant submicron dust at position angles between ∼45° and 90°. Spiral fitting resulted in very large pitch angles (∼30°-50°); a stellar flyby of HD 34700 B or infall from a possible envelope is perhaps a reasonable scenario to explain the large pitch angles.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Uyama, Taichi; Infrared Processing and Analysis Center, Infrared Processing and Analysis Center, National Astronomical Observatory of Japan
Currie, Thayne; NASA Ames Research Center, Subaru Telescope, Eureka Scientific, Oakland, California
Christiaens, Valentin ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR) ; Monash University, School of Physics
Bae, Jaehan; Sagan Fellow, Carnegie Institution of Washington, Department of Terrestrial Magnetism
Muto, Takayuki; Kogakuin University, Japan
Takahashi, Sanemichi Z.; National Astronomical Observatory of Japan
Tazaki, Ryo; Kogakuin University, Japan
Ygouf, Marie; Infrared Processing and Analysis Center
Kasdin, Jeremy N.; Princeton University, School of Engineering and Applied Science
Groff, Tyler; NASA Goddard Space Flight Center, Maryland
Brandt, Timothy D.; University of California, Santa Barbara, Department of Physics and Astronomy
Chilcote, Jeffrey; University of Notre Dame, Department of Physics
Hayashi, Masahiko; National Astronomical Observatory of Japan
McElwain, Michael W.; Goddard Space Flight Center, Astrophysics Division
Guyon, Olivier; Subaru Telescope, University of Arizona, Department of Astronomy and Steward Observatory, National Institutes of Natural Sciences, Japan
Lozi, Julien; Subaru Telescope
Jovanovic, Nemanja; California Institute of Technology, Division of Physics, Mathematics and Astronomy
Martinache, Frantz; Observatoire de la Cote d'Azur, France
Kudo, Tomoyuki; Subaru Telescope
Tamura, Motohide; National Astronomical Observatory of Japan, University of Tokyo, Department of Astronomy, Astrobiology Center, Japan
Akiyama, Eiji; Department of Engineering, Niigata Institute of Technology, 1719 Fujihashi, Kashiwazaki, Niigata 945-1195, Japan
Beichman, Charles A.; Infrared Processing and Analysis Center, Infrared Processing and Analysis Center
Grady, Carol A.; Eureka Scientific, Oakland, California, Goddard Space Flight Center, Astrophysics Division, -
Knapp, Gillian R.; Princeton University, Department of Astrophysical Sciences
Kwon, Jungmi; University of Tokyo, Department of Astronomy
Sitko, Michael; Space Science Institute, Colorado
Takami, Michihiro; Institute of Astronomy and Astrophysics Academia Sinica
Wagner, Kevin R.; University of Arizona, Department of Astronomy and Steward Observatory, University of Arizona, Department of Astronomy and Steward Observatory
Wisniewski, John P.; University of Oklahoma, Department of Physics and Astronomy
Yang, Yi; National Astronomical Observatory of Japan, University of Tokyo, Department of Astronomy
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