| Item type |
文献 / Documents(1) |
| 公開日 |
2022-04-15 |
| アクセス権 |
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|
アクセス権 |
open access |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版社版DOI |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1093/mnras/stab608 |
|
|
言語 |
ja |
|
|
関連名称 |
10.1093/mnras/stab608 |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
|
|
タイトル |
OMC-1 dust polarization in ALMA Band 7 : diagnosing grain alignment mechanisms in the vicinity of Orion Source I |
|
言語 |
en |
| タイトル別表記 |
|
|
その他のタイトル |
Dust polarization in OMC-1 |
|
言語 |
en |
| 著者 |
Pattle, Kate
Lai, Shih-Ping
Wright, Melvyn
Coudé, Simon
Plambeck, Richard
Hoang, Thiem
Tang, Ya-Wen
Bastien, Pierre
Eswaraiah, Chakali
古屋, 玲 S.
Hwang, Jihye
イヌツカ, シュウイチロウ
Kim, Kee-Tae
Kirchschlager, Florian
Kwon, Woojin
Lee, Chang Won
Liu, Sheng-Yuan
Lyo, Aran
オオハシ, ナガヨシ
Rawlings, Mark G.
Tahani, Mehrnoosh
タムラ, モトヒデ
Soam, Archana
Wang, Jia-Wei
Ward-Thompson, Derek
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
We present ALMA Band 7 polarization observations of the OMC-1 region of the Orion molecular cloud. We find that the polarization pattern observed in the region is likely to have been significantly altered by the radiation field of the >104 L⊙ high-mass protostar Orion Source I. In the protostar’s optically thick disc, polarization is likely to arise from dust self-scattering. In material to the south of Source I – previously identified as a region of ‘anomalous’ polarization emission – we observe a polarization geometry concentric around Source I. We demonstrate that Source I’s extreme luminosity may be sufficient to make the radiative precession time-scale shorter than the Larmor time-scale for moderately large grains (>0.005−0.1μm), causing them to precess around the radiation anisotropy vector (k-RATs) rather than the magnetic field direction (B-RATs). This requires relatively unobscured emission from Source I, supporting the hypothesis that emission in this region arises from the cavity wall of the Source I outflow. This is one of the first times that evidence for k-RAT alignment has been found outside of a protostellar disc or AGB star envelope. Alternatively, the grains may remain aligned by B-RATs and trace gas infall on to the Main Ridge. Elsewhere, we largely find the magnetic field geometry to be radial around the BN/KL explosion centre, consistent with previous observations. However, in the Main Ridge, the magnetic field geometry appears to remain consistent with the larger-scale magnetic field, perhaps indicative of the ability of the dense Ridge to resist disruption by the BN/KL explosion. |
|
言語 |
en |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
techniques: polarimetric |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
stars: formation |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
ISM: dust, extinction |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
ISM: magnetic fields |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
submillimetre: ISM |
| 書誌情報 |
en : Monthly Notices of the Royal Astronomical Society
巻 503,
号 3,
p. 3414-3433,
発行日 2021-03-04
|
| 収録物ID |
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|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
13652966 |
| 出版者 |
|
|
出版者 |
Oxford University Press |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
The Royal Astronomical Society |
|
言語 |
en |
| 権利情報 |
|
|
言語 |
en |
|
権利情報 |
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| EID |
|
|
識別子 |
376772 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
mnras_503_3_3414.pdf (13 MB)
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