Diagnosing 0.1-10 au Scale Morphology of the FU Ori Disk Using ALMA and VLTI/GRAVITY
Por:
Liu, Hauyu Baobab, Merand, Antoine, Green, Joel D., Perez, Sebastian, Hales, Antonio S., Yang, Yao-Lun, Dunham, Michael M., Hasegawa, Yasuhiro, Henning, Thomas, Galvan-Madrid, Roberto, Kospal, Agnes, Takami, Michihiro, Vorobyov, Eduard I., Zhu, Zhaohuan
Publicada:
1 ene 2019
Resumen:
We report new Atacama Large Millimeter/submillimeter Array Band 3 (86-100 GHz; ~80 mas angular resolution) and Band 4 (146-160 GHz; ~50 mas angular resolution) observations of the dust continuum emission toward the archetypal and ongoing accretion burst young stellar object FU Ori, which simultaneously covered its companion, FU Ori S. In addition, we present near-infrared (2-2.45 µm) observations of FU Ori taken with the General Relativity Analysis via VLT InTerferometrY (GRAVITY; ~1 mas angular resolution) instrument on the Very Large Telescope Interferometer (VLTI). We find that the emission in both FU Ori and FU Ori S at (sub)millimeter and near-infrared bands is dominated by structures inward of ~10 au radii. We detected closure phases close to zero from FU Ori with VLTI/GRAVITY, which indicate the source is approximately centrally symmetric and therefore is likely viewed nearly face-on. Our simple model to fit the GRAVITY data shows that the inner 0.4 au radii of the FU Ori disk has a triangular spectral shape at 2-2.45 µm, which is consistent with the H2O and CO absorption features in a 10-4 M o yr-1, viscously heated accretion disk. At larger (~0.4-10 au) radii, our analysis shows that viscous heating may also explain the observed (sub)millimeter and centimeter spectral energy distribution when we assume a constant, ~10-4 M o yr-1 mass inflow rate in this region. This explains how the inner 0.4 au disk is replenished with mass at a modest rate, such that it neither depletes nor accumulates significant masses over its short dynamic timescale. Finally, we tentatively detect evidence of vertical dust settling in the inner 10 au of the FU Ori disk, but confirmation requires more complete spectral sampling in the centimeter bands. © 2019. The American Astronomical Society. All rights reserved.
Filiaciones:
Liu, Hauyu Baobab:
Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei, 10617, Taiwan
Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 10617, Taiwan
Merand, Antoine:
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, Garching, D-85748, Germany
ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
Green, Joel D.:
Space Telescope Science Institute, Baltimore, MD 212180, United States
University of Texas at Austin, Department of Astronomy, Stop C1400, 2515 Speedway, Austin, TX 78712, United States
Space Telescope Sci Inst, Baltimore, MD 21218 USA
Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA
Perez, Sebastian:
Universidad de Santiago de Chile, Estación Central, Av. Libertador Bernardo O'Higgins 3363, Santiago, Chile
Univ Santiago Chile, Av Libertador Bernardo OHiggins 3363, Santiago, Chile
Hales, Antonio S.:
Joint ALMA Observatory, Avenida Alonso de Córdova 3107, Vitacura, Santiago, 7630355, Chile
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, United States
Joint ALMA Observ, Ave Alonso Cordova 3107, Santiago 7630355, Chile
Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA
Yang, Yao-Lun:
University of Texas at Austin, Department of Astronomy, Stop C1400, 2515 Speedway, Austin, TX 78712, United States
Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA
Dunham, Michael M.:
Department of Physics, State University of New York at Fredonia, 280 Central Avenue, Fredonia, NY 14063, United States
SUNY Coll Fredonia, Dept Phys, 280 Cent Ave, Fredonia, NY 14063 USA
Hasegawa, Yasuhiro:
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States
CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
Henning, Thomas:
Max Planck Institute for Astronomy (MPIA), Königstuhl 17, Heidelberg, D-69117, Germany
MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany
Galvan-Madrid, Roberto:
Instituto de Radioastronomía y Astrofísica (IRyA), UNAM, Apdo. Postal 72-3 (Xangari), Michoacán Morelia, 58089, Mexico
UNAM, Inst Radioastron & Astrofis IRyA, Apdo Postal 72-3 Xangari, Morelia 58089, Michoacan, Mexico
Kospal, Agnes:
Max Planck Institute for Astronomy (MPIA), Königstuhl 17, Heidelberg, D-69117, Germany
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly-Thege Miklós ut 15-17, Budapest, 1121, Hungary
MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany
Hungarian Acad Sci, Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
Takami, Michihiro:
Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei, 10617, Taiwan
Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 10617, Taiwan
Vorobyov, Eduard I.:
Department of Astrophysics, University of Vienna, Vienna, A-1180, Austria
Research Institute of Physics, Southern Federal University, Rostov-on-Don, 344090, Russian Federation
Univ Vienna, Dept Astrophys, A-1180 Vienna, Austria
Southern Fed Univ, Res Inst Phys, Rostov Na Donu 344090, Russia
Zhu, Zhaohuan:
Department of Physics and Astronomy, University of Nevada, 4505 S. Maryland Parkway, Las Vegas, Las Vegas, NV 89154, United States
Univ Nevada, Dept Phys & Astron, 4505 S Maryland Pkwy, Las Vegas, NV 89154 USA
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