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Observations of 6.7 GHz methanol masers with East-Asian VLBI Network. II. Internal proper motion measurement in G006.79-00.25

文献类型：期刊论文

作者Sugiyama, Koichiro1,12; Fujisawa, Kenta11,12; Hachisuka, Kazuya10,12; Yonekura, Yoshinori1; Motogi, Kazuhito8,11; Sawada-Satoh, Satoko1,8; Matsumoto, Naoko7; Hirano, Daiki12; Hayashi, Kyonosuke12; Kobayashi, Hideyuki7
刊名PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
出版日期2016-10-01
卷号68期号:5
ISSN号0004-6264
关键词Galaxies: Star Formation Instrumentation: High Angular Resolution Ism: Individual (G006.79-00.25) Masers Proper Motions
DOI10.1093/pasj/psv089
英文摘要We detected internal proper motions of the methanol maser features at 6.7 GHz in a high-mass star-forming region G006.79-00.25 with the East-Asian VLBI Network. The spatial distribution of the maser features shows an elliptical morphology. The internal proper motions of 17 methanol maser features relative to the barycenter of the features were measured. The amplitude of the internal motions ranged from 1.30 to 10.25 kms(-1). Most of the internal proper motions of the maser features seem to point counter-clockwise along the elliptical morphology of the maser features. We applied the disk model, which includes both rotating and expanding components, to the observed positions, i.o.s. velocities, and proper motions. The derived rotation, expansion, and systemic velocities are +3(-2)(+2), +6(-2)(+2), and +21(-2)(+2) kms(-1), respectively, at the radius of 1260 au on the disk with a position angle of the semi-major axis of -140 degrees. and an inclination of 60 degrees. The derived rotating motion suggests that the methanol maser emissions showing the elliptical spatial morphology possibly trace the rotating disk. The derived expanding motion might be caused by the magnetic-centrifugal wind on the disk, which was estimated on the basis of the typical magnetic field strength at emitting zones of a methanol maser.
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000386203400005
源URL[http://119.78.226.72/handle/331011/32739]  
专题中国科学院上海天文台
通讯作者Sugiyama, Koichiro
作者单位1.Ibaraki Univ, Ctr Astron, 2-1-1 Bunkyo, Mito, Ibaraki 3108512, Japan
2.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 305348, South Korea
3.Kagoshima Univ, Grad Sch Sci & Engn, Dept Phys & Astron, 1-21-35 Korimoto, Kagoshima 8900065, Japan
4.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuou Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan
5.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Beijing 210008, Peoples R China
6.Osaka Prefecture Univ, Dept Phys Sci, Naka Ku, 1-1 Gakuen Cho, Sakai, Osaka 5998531, Japan
7.NAOJ, Mizusawa VLBI Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
8.Natl Astron Observ Japan, Mizusawa VLBI Observ, Mizusawa Ku, 2-12 Hoshigaoka Cho, Oshu, Iwate 0230861, Japan
9.Hokkaido Univ, Dept Cosmosci, Dept Phys, Kita Ku, Kita 10 Nishi 8, Sapporo, Hokkaido 0600810, Japan
10.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
推荐引用方式
GB/T 7714		 Sugiyama, Koichiro,Fujisawa, Kenta,Hachisuka, Kazuya,et al. Observations of 6.7 GHz methanol masers with East-Asian VLBI Network. II. Internal proper motion measurement in G006.79-00.25[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2016,68(5).
APA Sugiyama, Koichiro.,Fujisawa, Kenta.,Hachisuka, Kazuya.,Yonekura, Yoshinori.,Motogi, Kazuhito.,...&Shen, Zhiqiang.(2016).Observations of 6.7 GHz methanol masers with East-Asian VLBI Network. II. Internal proper motion measurement in G006.79-00.25.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,68(5).
MLA Sugiyama, Koichiro,et al."Observations of 6.7 GHz methanol masers with East-Asian VLBI Network. II. Internal proper motion measurement in G006.79-00.25".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 68.5(2016).

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