The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk
Spatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and spiral arms, all possibly generated by companions. We present ALMA dust continuum...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/aac6cb |
| _version_ | 1797661641441017856 |
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| author | Ruobing Dong Sheng-yuan Liu Josh Eisner Sean Andrews Jeffrey Fung Zhaohuan Zhu Eugene Chiang Jun Hashimoto Hauyu Baobab Liu Simon Casassus Thomas Esposito Yasuhiro Hasegawa Takayuki Muto Yaroslav Pavlyuchenkov David Wilner Eiji Akiyama Motohide Tamura John Wisniewski |
| author_facet | Ruobing Dong Sheng-yuan Liu Josh Eisner Sean Andrews Jeffrey Fung Zhaohuan Zhu Eugene Chiang Jun Hashimoto Hauyu Baobab Liu Simon Casassus Thomas Esposito Yasuhiro Hasegawa Takayuki Muto Yaroslav Pavlyuchenkov David Wilner Eiji Akiyama Motohide Tamura John Wisniewski |
| author_sort | Ruobing Dong |
| collection | DOAJ |
| description | Spatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and spiral arms, all possibly generated by companions. We present ALMA dust continuum observations of MWC 758 at 0.87 mm wavelength with 43 × 39 mas angular resolution (6.9 × 6.2 au) and 20 μ Jy beam ^−1 rms. The central submillimeter emission cavity is revealed to be eccentric; once deprojected, its outer edge can be well fitted by an ellipse with an eccentricity of 0.1 and one focus on the star. The broad ring-like outer disk is resolved into three narrow rings with two gaps in between. The outer two rings tentatively show the same eccentricity and orientation as the innermost ring bounding the inner cavity. The two previously known dust emission clumps are resolved in both the radial and azimuthal directions, with radial widths equal to ∼4× the local scale height. Only one of the two spiral arms previously imaged in near-infrared (NIR) scattered light is revealed in ALMA dust emission, at a slightly larger stellocentric distance owing to projection effects. We also submit evidence of disk truncation at ∼100 au based on comparing NIR imaging observations with models. The spirals, the north clump, and the truncated disk edge are all broadly consistent with the presence of one companion exterior to the spirals at roughly 100 au. |
| first_indexed | 2024-03-11T18:48:32Z |
| format | Article |
| id | doaj.art-5386f69c59a04fdcb39cda1ff5fa0b09 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-11T18:48:32Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-5386f69c59a04fdcb39cda1ff5fa0b092023-10-11T14:25:01ZengIOP PublishingThe Astrophysical Journal1538-43572018-01-01860212410.3847/1538-4357/aac6cbThe Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 DiskRuobing Dong0https://orcid.org/0000-0001-9290-7846Sheng-yuan Liu1Josh Eisner2https://orcid.org/0000-0002-1031-4199Sean Andrews3https://orcid.org/0000-0003-2253-2270Jeffrey Fung4Zhaohuan Zhu5Eugene Chiang6https://orcid.org/0000-0002-6246-2310Jun Hashimoto7Hauyu Baobab Liu8Simon Casassus9https://orcid.org/0000-0002-0433-9840Thomas Esposito10https://orcid.org/0000-0002-0792-3719Yasuhiro Hasegawa11Takayuki Muto12Yaroslav Pavlyuchenkov13David Wilner14https://orcid.org/0000-0003-1526-7587Eiji Akiyama15https://orcid.org/0000-0002-5082-8880Motohide Tamura16https://orcid.org/0000-0002-6510-0681John Wisniewski17https://orcid.org/0000-0001-9209-1808Steward Observatory, University of Arizona , Tucson, AZ 85721, USA; Institute of Astronomy and Astrophysics , Academia Sinica, Taipei 10617, Taiwan, Republic of ChinaInstitute of Astronomy and Astrophysics , Academia Sinica, Taipei 10617, Taiwan, Republic of ChinaSteward Observatory, University of Arizona , Tucson, AZ 85721, USAHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USADepartment of Astronomy, University of California at Berkeley , Campbell Hall, Berkeley, CA 94720-3411, USADepartment of Physics and Astronomy, University of Nevada , Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USADepartment of Astronomy, University of California at Berkeley , Campbell Hall, Berkeley, CA 94720-3411, USAAstrobiology Center of NINS, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, JapanEuropean Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, D-85748 Garching, GermanyDepartamento de Astronomia, Universidad de Chile , Casilla 36-D, Santiago, ChileDepartment of Astronomy, University of California at Berkeley , Campbell Hall, Berkeley, CA 94720-3411, USAJet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USADivision of Liberal Arts, Kogakuin University , 1-24-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-8677, JapanInstitute of Astronomy , Russian Academy of Sciences, Moscow, RussiaHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USANational Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanAstrobiology Center of NINS, 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, JapanH. L. Dodge Department of Physics & Astronomy, University of Oklahoma , 440 W. Brooks St., Norman, OK 73019, USASpatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and spiral arms, all possibly generated by companions. We present ALMA dust continuum observations of MWC 758 at 0.87 mm wavelength with 43 × 39 mas angular resolution (6.9 × 6.2 au) and 20 μ Jy beam ^−1 rms. The central submillimeter emission cavity is revealed to be eccentric; once deprojected, its outer edge can be well fitted by an ellipse with an eccentricity of 0.1 and one focus on the star. The broad ring-like outer disk is resolved into three narrow rings with two gaps in between. The outer two rings tentatively show the same eccentricity and orientation as the innermost ring bounding the inner cavity. The two previously known dust emission clumps are resolved in both the radial and azimuthal directions, with radial widths equal to ∼4× the local scale height. Only one of the two spiral arms previously imaged in near-infrared (NIR) scattered light is revealed in ALMA dust emission, at a slightly larger stellocentric distance owing to projection effects. We also submit evidence of disk truncation at ∼100 au based on comparing NIR imaging observations with models. The spirals, the north clump, and the truncated disk edge are all broadly consistent with the presence of one companion exterior to the spirals at roughly 100 au.https://doi.org/10.3847/1538-4357/aac6cbplanet–disk interactionsplanets and satellites: formationprotoplanetary disksstars: individual (MWC 758)stars: variables: T Tauri, Herbig Ae/Be |
| spellingShingle | Ruobing Dong Sheng-yuan Liu Josh Eisner Sean Andrews Jeffrey Fung Zhaohuan Zhu Eugene Chiang Jun Hashimoto Hauyu Baobab Liu Simon Casassus Thomas Esposito Yasuhiro Hasegawa Takayuki Muto Yaroslav Pavlyuchenkov David Wilner Eiji Akiyama Motohide Tamura John Wisniewski The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk The Astrophysical Journal planet–disk interactions planets and satellites: formation protoplanetary disks stars: individual (MWC 758) stars: variables: T Tauri, Herbig Ae/Be |
| title | The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk |
| title_full | The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk |
| title_fullStr | The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk |
| title_full_unstemmed | The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk |
| title_short | The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk |
| title_sort | eccentric cavity triple rings two armed spirals and double clumps of the mwc 758 disk |
| topic | planet–disk interactions planets and satellites: formation protoplanetary disks stars: individual (MWC 758) stars: variables: T Tauri, Herbig Ae/Be |
| url | https://doi.org/10.3847/1538-4357/aac6cb |
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