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Millimeter observations of the disk around GW Orionis
Fang, M.1,2; Sicilia-Aguilar, A.1,3,4; Wilner, D.5; Wang, Y.6,7,8; Roccatagliata, V.9; Fedele, D.10; Wang, J. Z.11
2017-07-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume603Pages:10
Corresponding AuthorFang, M.(mfang.cn@gmail.com)
AbstractThe GW Ori system is a pre-main sequence triple system (GW Ori A/B/C) with companions (GW Ori B/C) at similar to 1AU and similar to 8AU, respectively, from the primary (GW Ori A). The primary of the system has a mass of 3.9 M-circle dot, but shows a spectral type of G8. Thus, GW Ori A could be a precursor of a B star, but it is still at an earlier evolutionary stage than Herbig Be stars. GW Ori provides an ideal target for experiments and observations (being a "blown-up" solar system with a very massive sun and at least two upscaled planets). We present the first spatially resolved millimeter interferometric observations of the disk around the triple pre-main sequence system GW Ori, obtained with the Submillimeter Array, both in continuum and in the (CO)-C-12 J = 2-1, (CO)-C-13 J = 2 1, and (CO)-O-18 J = 2-1 lines. These new data reveal a huge, massive, and bright disk in the GW Ori system. The dust continuum emission suggests a disk radius of around 400AU, but the 12CO J = 2 1 emission shows a much more extended disk with a size around 1300AU. Owing to the spatial resolution (similar to 1"), we cannot detect the gap in the disk that is inferred from spectral energy distribution (SED) modeling. We characterize the dust and gas properties in the disk by comparing the observations with the predictions from the disk models with various parameters calculated with a Monte Carlo radiative transfer code RADMC-3D. The disk mass is around 0.12 M-circle dot, and the disk inclination with respect to the line of sight is around similar to 35 degrees. The kinematics in the disk traced by the CO line emission strongly suggest that the circumstellar material in the disk is in Keplerian rotation around GW Ori. Tentatively substantial (CO)-O-18 depletion in gas phase is required to explain the characteristics of the line emission from the disk.
Keywordcircumstellar matter stars: pre-main sequence binaries: spectroscopic stars: individual: GW Orionis
DOI10.1051/0004-6361/201628792
WOS KeywordMAIN-SEQUENCE STARS ; T-TAURI STARS ; ALL-SKY SURVEY ; FORMING REGIONS ; PROTOPLANETARY DISKS ; SUBMILLIMETER ARRAY ; PLANET FORMATION ; EVOLUTION ; DUST ; MULTIPLICITY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000406619100013
PublisherEDP SCIENCES S A
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22650
Collection中国科学院紫金山天文台
Corresponding AuthorFang, M.
Affiliation1.Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain
2.Univ Arizona, Dept Astron, 933 North Cherry Ave, Tucson, AZ 85721 USA
3.Univ St Andrews, Sch Phys & Astron, SUPA, North Haugh, St Andrews KY16 9SS, Fife, Scotland
4.Univ Dundee, Sch Sci & Engn, Dundee DD1 4HN, Scotland
5.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
6.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
7.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
8.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
9.Ludwig Maximilians Univ Munchen, Univ Sternwarte Munchen, Scheinerstr 1, D-81679 Munich, Germany
10.INAF, Osservatorio Astrofis Arcetri, L Go E Fermi 5, I-50125 Florence, Italy
11.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Fang, M.,Sicilia-Aguilar, A.,Wilner, D.,et al. Millimeter observations of the disk around GW Orionis[J]. ASTRONOMY & ASTROPHYSICS,2017,603:10.
APA Fang, M..,Sicilia-Aguilar, A..,Wilner, D..,Wang, Y..,Roccatagliata, V..,...&Wang, J. Z..(2017).Millimeter observations of the disk around GW Orionis.ASTRONOMY & ASTROPHYSICS,603,10.
MLA Fang, M.,et al."Millimeter observations of the disk around GW Orionis".ASTRONOMY & ASTROPHYSICS 603(2017):10.
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