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What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 mu m: Dust Self-scattering or Dichroic Extinction?
Lee, Chin-Fei1,2; Li, Zhi-Yun3; Yang, Haifeng4; Lin, Zhe-Yu Daniel3; Ching, Tao-Chung5,6; Lai, Shih-Ping1,7,8
2021-03-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume910Issue:1Pages:12
AbstractWe report the results of new dust polarization of a nearly edge-on disk in the HH 212 protostellar system, obtained with the Atacama Large Millimeter/submillimeter Array at similar to 0.035 '' (14 au) resolution in a continuum at lambda similar to 878 mu m. Dust polarization is detected within similar to 44 au of the central source, where a rotationally supported disk has formed. The polarized emission forms V-shaped structures opening to the east, and probably to the west, arising from the disk surfaces and arm structures further away in the east and west, which could be due to potential spiral arms excited in the outer disk. The orientations of the polarization are mainly parallel to the minor axis of the disk, with some in the western part tilting slightly away from the minor axis to form a concave shape with respect to the center. This tilting of the orientations of the polarization is expected from dust self-scattering, e.g., by 50-75 mu m grains in a young disk. The intensity and degree of the polarization both peak near the central source with a small dip at the central source and decrease toward the edges. These decreases in the intensity and degree of polarization are expected from dichroic extinction by grains aligned by poloidal fields, but may also be consistent with dust self-scattering if the grain size decreases toward the edges. It is possible that both mechanisms are needed to produce the observed dust polarization, suggesting the presence of both grain growth and poloidal fields in the disk.
KeywordStar formation Accretion Young stellar objects Polarimetry Magnetic fields
Funding OrganizationMinistry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia
DOI10.3847/1538-4357/abe53a
Language英语
Funding ProjectMinistry of Science and Technology of Taiwan[1062119-M-007 -021 -MY3] ; Ministry of Science and Technology of Taiwan[109-2112-M-007 -010 -MY3] ; Ministry of Science and Technology of Taiwan[MoST 107-2119-M-001-040-MY3] ; Academia Sinica[AS-IA-108-M01] ; NASA[80NSSC18K1095] ; NASA[80NSSC20K0533] ; NSF[AST-1815784] ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia
Funding OrganizationMinistry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia ; Ministry of Science and Technology of Taiwan ; Ministry of Science and Technology of Taiwan ; Academia Sinica ; Academia Sinica ; NASA ; NASA ; NSF ; NSF ; ALMA SOS award ; ALMA SOS award ; Jefferson Graduate Fellowship at the University of Virginia ; Jefferson Graduate Fellowship at the University of Virginia
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000634692200001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78782
Collection中国科学院国家天文台
Corresponding AuthorLee, Chin-Fei
Affiliation1.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 106, Taiwan
2.Natl Taiwan Univ, Grad Inst Astron & Astrophys, 1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan
3.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
4.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
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, Inst Astron, Hsinchu, Taiwan
8.Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan
Recommended Citation
GB/T 7714
Lee, Chin-Fei,Li, Zhi-Yun,Yang, Haifeng,et al. What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 mu m: Dust Self-scattering or Dichroic Extinction?[J]. ASTROPHYSICAL JOURNAL,2021,910(1):12.
APA Lee, Chin-Fei,Li, Zhi-Yun,Yang, Haifeng,Lin, Zhe-Yu Daniel,Ching, Tao-Chung,&Lai, Shih-Ping.(2021).What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 mu m: Dust Self-scattering or Dichroic Extinction?.ASTROPHYSICAL JOURNAL,910(1),12.
MLA Lee, Chin-Fei,et al."What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 mu m: Dust Self-scattering or Dichroic Extinction?".ASTROPHYSICAL JOURNAL 910.1(2021):12.
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