[en] We present L'-band Keck/NIRC2 imaging and H-band Subaru/AO188+HiCIAO polarimetric observations of the CQ Tau disk with a new spiral arm. Apart from the spiral feature, our observations could not detect any companion candidates. We traced the spiral feature from the r[SUP]2[/SUP]-scaled High-Contrast Coronographic Imager for Adaptive Optics (HiCIAO) polarimetric intensity image and the fitted result is used for forward modeling to reproduce the ADI-reduced NIRC2 image. We estimated the original surface brightness after throughput correction in the L' band to be ∼126 mJy arcsec[SUP]-2[/SUP] at most. We suggest that the grain temperature of the spiral may be heated up to ∼200 K in order to explain both of the H- and L'-band results. The H-band emission at the location of the spiral originates from the scattering from the disk surface while both scattering and thermal emission may contribute to the L'-band emission. If the central star is only the light source of scattered light, the spiral emission at the L' band should be thermal emission. If an inner disk also acts as the light source, the scattered light and the thermal emission may equally contribute to the L'-band spiral structure.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Uyama, Taichi; Infrared Processing and Analysis Center, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA ; NASA Exoplanet Science Institute, Pasadena, CA 91125, USA ; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Muto, Takayuki; Division of Liberal Arts, Kogakuin University, 1-24-2, Nishi-Shinjuku, Shinjuku-ku, Tokyo, 163-8677, Japan
Mawet, Dimitri; Department of Astronomy, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA ; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Christiaens, Valentin; Monash Centre for Astrophysics (MoCA) and School of Physics and Astronomy, Monash University, Clayton Vic 3800, Australia
Hashimoto, Jun; Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; Subaru Telescope, National Astronomical Observatory of Japan, Mitaka, Tokyo, 181-8588, Japan ; Department of Astronomy, School of Science, Graduate University for Advanced Studies (SOKENDAI), Mitaka, Tokyo 181-8588, Japan
Kudo, Tomoyuki; Subaru Telescope, National Astronomical Observatory of Japan, Mitaka, Tokyo, 181-8588, Japan
Kuzuhara, Masayuki; Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Ruane, Garreth; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Beichman, Charles; Infrared Processing and Analysis Center, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA ; NASA Exoplanet Science Institute, Pasadena, CA 91125, USA
Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > PSILab
Akiyama, Eiji; Institute for the Advancement of Higher Education, Hokkaido University, Kita17, Nishi8, Kita-ku, Sapporo, 060-0817, Japan
Bae, Jaehan; NHFP Sagan Fellow. ; Department of Terrestrial Magnetism, Carnegie Institution for Science, 5241 Broad Branch Road NW, Washington, DC 20015, USA
Bottom, Michael; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Choquet, Elodie; Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
Currie, Thayne; Subaru Telescope, National Astronomical Observatory of Japan, Mitaka, Tokyo, 181-8588, Japan ; NASA-Ames Research Center, Moffett Field, CA, USA ; Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA, USA
Dong, Ruobing; Department of Physics & Astronomy, University of Victoria, Victoria, BC, V8P 1A1, Canada
Follette, Katherine B.; Physics and Astronomy Department, Amherst College, 21 Merrill Science Drive, Amherst, MA 01002, USA
Fukagawa, Misato; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Guidi, Greta; ETH Zurich, Institute for Particle Physics and Astrophysics, Wolfgang-Pauli-Str. 27, 8093 Zurich, Switzerland
Huby, Elsa; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92195 Meudon, France
Kwon, Jungmi; Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Mayama, Satoshi; The Graduate University for Advanced Studies, SOKENDAI, Shonan International Village, Hayama-cho, Miura-gun, Kanagawa 240-0193, Japan
Meshkat, Tiffany; Infrared Processing and Analysis Center, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA
Reggiani, Maddalena; Institute of Astrophysics, KU Leuven, Celestijnlaan 200D, B-3001 Leuven, Belgium
Ricci, Luca; Department of Physics and Astronomy, California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330, USA
Serabyn, Eugene; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Tamura, Motohide; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Wallack, Nicole; Division of Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA
Williams, Jonathan; Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA
Zhu, Zhaohuan; Department of Physics and Astronomy, University of Nevada, Las Vegas, 4505 S. Maryland Parkway, Las Vegas, NV, 89154-4002, USA ; )
