NAOC Open IR
Multi-scale Dust Polarization and Spiral-like Stokes-I Residual in the Class I Protostellar System TMC-1A
Aso, Yusuke1; Kwon, Woojin2,3; Hirano, Naomi4; Ching, Tao-Chung5,6; Lai, Shih-Ping7,8,9; Li, Zhi-Yun10; Rao, Ramprasad11
2021-10-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume920Issue:2Pages:16
AbstractWe have observed the Class I protostar TMC-1A in the Taurus molecular cloud using the Submillimeter Array (SMA) and the Atacama Large Millimeter/submillimeter Array (ALMA) in the linearly polarized 1.3 mm continuum emission at angular resolutions of similar to 3 '' and similar to 0.3 '', respectively. The ALMA observations also include CO, (CO)-C-13, and (CO)-O-18 J = 2-1 spectral lines. The SMA observations trace magnetic fields on the 1000 au scale, the directions of which are neither parallel nor perpendicular to the outflow direction. Applying the Davis-Chandrasekhar-Fermi method to the SMA polarization angle dispersion, we estimate a field strength in the TMC-1A envelope of 1-5 mG. It is consistent with the field strength needed to reduce the radial infall velocity to the observed value, which is substantially less than the local freefall velocity. The ALMA polarization observations consist of two distinct components-a central component and a north/south component. The central component shows polarization directions in the disk minor axis to be azimuthal, suggesting dust self-scattering in the TMC-1A disk. The north/south component is located along the outflow axis and the polarization directions are aligned with the outflow direction. We discuss possible origins of this polarization structure, including grain alignment by a toroidal magnetic field and mechanical alignment by the gaseous outflow. In addition, we discover a spiral-like residual in the total intensity (Stokes I) for the first time. The (CO)-O-18 emission suggests that material in the spiral-like structure is infalling at a speed that is 20% of the local Keplerian speed.
Funding OrganizationALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF ; ALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF ; ALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF ; ALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF
DOI10.3847/1538-4357/ac15f3
WOS KeywordALMA OBSERVATIONS ; EMISSION ; ENVELOPES ; PHASE ; DISKS
Language英语
Funding ProjectALMA[2018.1.00701] ; Smithsonian Institution ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT)[NRF-2021R1F1A1061794] ; Ministry of Science and Technology (MoST) of Taiwan[MoST 109-2112-M-001-023] ; Ministry of Science and Technology (MoST) of Taiwan[110-2112-M-001-048] ; Ministry of Science and Technology of Taiwan[109-2112-M-007-010-MY3] ; NASA[80NSSC18K1095] ; NSF[AST-1716259] ; NSF[1815784]
Funding OrganizationALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF ; ALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF ; ALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF ; ALMA ; ALMA ; Smithsonian Institution ; Smithsonian Institution ; Academia Sinica ; Academia Sinica ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; National Research Foundation of Korea (NRF) - Korea government (MSIT) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; NASA ; NASA ; NSF ; NSF
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000707459700001
PublisherIOP Publishing Ltd
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/74775
Collection中国科学院国家天文台
Corresponding AuthorAso, Yusuke
Affiliation1.Korea Astron & Space Sci Inst KASI, 776 Daedeokdae Ro, Daejeon 34055, South Korea
2.Seoul Natl Univ, Dept Earth Sci Educ, 1 Gwanak Ro, Seoul 08826, South Korea
3.Seoul Natl Univ, SNU Astron Res Ctr, 1 Gwanak Ro, Seoul 08826, South Korea
4.Acad Sinica, Inst Astron & Astrophys, 11F ASMA Bldg 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan
5.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China
7.Natl Tsing Hua Univ, Dept Phys, 101 Sect 2 Kuang Fu Rd, Hsinchu 30013, Taiwan
8.Natl Tsing Hua Univ, Inst Astron, 101 Sect 2 Kuang Fu Rd, Hsinchu 30013, Taiwan
9.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 10617, Taiwan
10.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
11.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
Recommended Citation
GB/T 7714
Aso, Yusuke,Kwon, Woojin,Hirano, Naomi,et al. Multi-scale Dust Polarization and Spiral-like Stokes-I Residual in the Class I Protostellar System TMC-1A[J]. ASTROPHYSICAL JOURNAL,2021,920(2):16.
APA Aso, Yusuke.,Kwon, Woojin.,Hirano, Naomi.,Ching, Tao-Chung.,Lai, Shih-Ping.,...&Rao, Ramprasad.(2021).Multi-scale Dust Polarization and Spiral-like Stokes-I Residual in the Class I Protostellar System TMC-1A.ASTROPHYSICAL JOURNAL,920(2),16.
MLA Aso, Yusuke,et al."Multi-scale Dust Polarization and Spiral-like Stokes-I Residual in the Class I Protostellar System TMC-1A".ASTROPHYSICAL JOURNAL 920.2(2021):16.
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