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3 results on '"Ryo Kandori"'

1. High-resolution Near-infrared Polarimetry and Submillimeter Imaging of FS Tau A: Possible Streamers in Misaligned Circumbinary Disk System

Author

Tae-Soo Pyo, Tomoyuki Kudo, Julien Lozi, Olivier Guyon, Ryuji Suzuki, Jungmi Kwon, Masanori Iye, Joseph C. Carson, Hiroshi Suto, Jeffrey Chilcote, Masahiko Hayashi, Takao Nakagawa, Nemanja Jovanovic, Thomas Henning, Christian Thalmann, M. Bonnefoy, Yutaka Hayano, Tetsuo Nishimura, Eugene Serabyn, Miki Ishii, Klaus W. Hodapp, Yang Yang, Tomonori Usuda, Ryo Kandori, Michael W. McElwain, Makoto Watanabe, Eiji Akiyama, Toru Yamada, Taichi Uyama, Masayuki Kuzuhara, Gillian R. Knapp, Nobuhiko Kusakabe, Evan A. Rich, Shoken M. Miyama, Markus Janson, Carol A. Grady, Saeko S. Hayashi, Wolfgang Brandner, Lyu Abe, Jun-Ichi Morino, Jun Hashimoto, Michihiro Takami, Thayne Currie, Timothy D. Brandt, Motohide Tamura, Markus Feldt, Miwa Goto, Naruhisa Takato, Jeremy Kasdin, Tyler D. Groff, Hideki Takami, Edwin L. Turner, John P. Wisniewski, Frantz Martinache, Satoshi Mayama, Ruobing Dong, Hiroshi Terada, Amaya Moro-Martin, Taro Matsuo, Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Signal Processing Laboratory (SPL), Wuhan University [China], Hokkaido University [Sapporo, Japan], National Astronomical Observatory of Japan (NAOJ), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), Academia Sinica, NASA Goddard Space Flight Center (GSFC), California Institute of Technology (CALTECH), The University of Tokyo (UTokyo), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, and Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France

Subjects
010504 meteorology & atmospheric sciences, Polarimetry, FOS: Physical sciences, Binary number, Astrophysics, 01 natural sciences, 0103 physical sciences, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Line (formation), Earth and Planetary Astrophysics (astro-ph.EP), Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Near-infrared spectroscopy, Astronomy and Astrophysics, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astrophysics - Astrophysics of Galaxies, Wavelength, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Millimeter, Circumbinary planet, Astrophysics - Earth and Planetary Astrophysics
Abstract

We analyzed the young (2.8-Myr-old) binary system FS Tau A using near-infrared (H-band) high-contrast polarimetry data from Subaru/HiCIAO and sub-millimeter CO (J=2-1) line emission data from ALMA. Both the near-infrared and sub-millimeter observations reveal several clear structures extending to $\sim$240 AU from the stars. Based on these observations at different wavelengths, we report the following discoveries. One arm-like structure detected in the near-infrared band initially extends from the south of the binary with a subsequent turn to the northeast, corresponding to two bar-like structures detected in ALMA observations with an LSRK velocity of 1.19-5.64 km/s. Another feature detected in the near-infrared band extends initially from the north of the binary, relating to an arm-like structure detected in ALMA observations with an LSRK velocity of 8.17-16.43 km/s. From their shapes and velocities, we suggest that these structures can mostly be explained by two streamers that connect the outer circumbinary disk and the central binary components. These discoveries will be helpful for understanding the evolution of streamers and circumstellar disks in young binary systems., 20 pages, 11 figures, accepted for publication in The Astrophysical Journal

Published
2020
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2. Spiral Arms in the Asymmetrically Illuminated Disk of MWC 758 and Constraints on Giant Planets

Author

Carol A. Grady, Tetsuro Nishimura, Edwin L. Turner, Lyu Abe, Motohide Tamura, Jeremy Hornbeck, Toru Yamada, Th. Henning, Sebastian Egner, Ruobing Dong, Jordy Bouwman, Nobuhiko Kusakabe, Klaus W. Hodapp, Satoshi Mayama, M. Bonnefoy, Jungmi Kwon, Michael L. Sitko, M. Hayashi, J.-U. Pott, G. Serabyn, Wolfgang Brandner, John P. Wisniewski, Sylvestre Lacour, Michihiro Takami, Saeko S. Hayashi, Timothy D. Brandt, Takayuki Muto, Hannah Jang-Condell, Masanori Iye, Markus Janson, Masayuki Kuzuhara, Miwa Goto, A. Crida, David J. Wilner, Tomoyuki Kudo, Jun-Ichi Morino, Jun Hashimoto, Katherine B. Follette, Joseph C. Carson, G. R. Knapp, Christian Thalmann, Miki Ishii, Ryo Kandori, Amaya Moro-Martin, Tomonori Usuda, Michael W. McElwain, Sean M. Andrews, Yutaka Hayano, Glenn Schneider, S. Sai, T. Currie, Adam L. Kraus, Makoto Watanabe, Hiroshi Suto, Gael Chauvin, Naruhisa Takato, Beth Biller, Thomas P. Robitaille, Dean C. Hines, Taro Matsuo, Daigo Tomono, Tae-Soo Pyo, Ray W. Russell, Olivier Guyon, Markus Feldt, Attila Juhasz, Scott Dahm, Ryuji Suzuki, A. Mueller, Hideki Takami, Hiroshi Terada, Misato Fukagawa, Shoken Miyama, Eiji Akiyama, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Low Energy Astrophysics (API, FNWI), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, Brown dwarf, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Density wave theory, Planet, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Earth and Planetary Astrophysics (astro-ph.EP), Physics, [PHYS]Physics [physics], Spiral galaxy, Astronomy and Astrophysics, Planetary system, Exoplanet, Accretion (astrophysics), Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Planetary mass, Astrophysics - Earth and Planetary Astrophysics
Abstract

We present the first near-IR scattered light detection of the transitional disk associated with the Herbig Ae star MWC 758 using data obtained as part of the Strategic Exploration of Exoplanets and Disks with Subaru, and 1.1 micron HST/NICMOS data. While sub-millimeter studies suggested there is a dust-depleted cavity with r=0.35, we find scattered light as close as 0.1 (20-28 AU) from the star, with no visible cavity at H, K', or Ks. We find two small-scaled spiral structures which asymmetrically shadow the outer disk. We model one of the spirals using spiral density wave theory, and derive a disk aspect ratio of h ~ 0.18, indicating a dynamically warm disk. If the spiral pattern is excited by a perturber, we estimate its mass to be 5+3,-4 Mj, in the range where planet filtration models predict accretion continuing onto the star. Using a combination of non-redundant aperture masking data at L' and angular differential imaging with Locally Optimized Combination of Images at K' and Ks, we exclude stellar or massive brown dwarf companions within 300 mas of the Herbig Ae star, and all but planetary mass companions exterior to 0.5. We reach 5-sigma contrasts limiting companions to planetary masses, 3-4 MJ at 1.0 and 2 MJ at 1.55 using the COND models. Collectively, these data strengthen the case for MWC 758 already being a young planetary system., 45 pages, 9 figures; ApJ in press

Published
2013
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3. Near-infrared Multi-band Photometry of the Substellar Companion GJ 758 B

Author

Amaya Moro-Martin, Michihiro Takami, Thomas Henning, Benjamin M. Tofflemire, Michael W. McElwain, Naruhisa Takato, Lyu Abe, Masayuki Kuzuhara, Yutaka Hayano, Christian Thalmann, Miwa Goto, Gillian R. Knapp, Markus Janson, Eugene Serabyn, Wolfgang Brandner, Taro Matsuo, Tomonori Usuda, Adam Burrows, Saeko S. Hayashi, Jun-Ichi Morino, Hideki Takami, Hiroshi Suto, Sebastian Egner, Nobuhiko Kusakabe, Shoken Miyama, Tae-Soo Pyo, Olivier Guyon, Jun Hashimoto, Justin Crepp, Carol A. Grady, Satoshi Mayama, Masanori Iye, Taras Golota, Hiroshi Terada, John P. Wisniewski, Makoto Watanabe, Joseph C. Carson, Ryuji Suzuki, Tetsuro Nishimura, Miki Ishii, D. Tomono, Markus Feldt, Ryo Kandori, Klaus W. Hodapp, Edwin L. Turner, Motohide Tamura, Toru Yamada, Masahiko Hayashi, Tomoyuki Kudo, Laboratoire Hippolyte Fizeau (FIZEAU), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Earth and Planetary Astrophysics (astro-ph.EP), 010504 meteorology & atmospheric sciences, Infrared, Near-infrared spectroscopy, Brown dwarf, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Planetary system, 01 natural sciences, Spectral line, Photometry (optics), Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, 0103 physical sciences, Spectral energy distribution, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Astrophysics - Earth and Planetary Astrophysics
Abstract

GJ 758 B is a cold (~600K) companion to a Sun-like star at 29 AU projected separation, which was recently detected with high-contrast imaging. Here we present photometry of the companion in seven photometric bands from Subaru/HiCIAO, Gemini/NIRI and Keck/NIRC2, providing a rich sampling of the spectral energy distribution in the 1-5 micron wavelength range. A clear detection at 1.58 micron combined with an upper limit at 1.69 micron shows methane absorption in the atmosphere of the companion. The mass of the companion remains uncertain, but an updated age estimate indicates that the most likely mass range is ~30-40 Mjup. In addition, we present an updated astrometric analysis that imposes tighter constraints on GJ 758 B's orbit and identifies the proposed second candidate companion, "GJ 758 C", as a background star., Comment: 10 pages, 4 figures, accepted for publication in ApJ Letters. New version: Corrected a few numbers in the astrometry section (which were already correct in the print version, but were based on an outdated simulation in the astro-ph version)

Published
2011
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