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| ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28 | |
Wu, Gang1,2 ; Henkel, Christian1,2,3; Xu, Ye4; Brunthaler, Andreas1; Menten, Karl M.1; Qiu, Keping5; Li, Jingjing4; Zhang, Bo6; Esimbek, Jarken2
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| 2023-09-08 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
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| ISSN | 0004-6361 |
| Volume | 677Pages:A80 |
| Contribution Rank | 2 |
| Abstract | Protostellar jets and outflows are essential ingredients of the star formation process. A better understanding of this phenomenon is important in its own right as well as for many fundamental aspects of star formation. Jets and outflows associated with O-type protostars are rarely studied with observations reaching the close vicinity of the protostars. In this work, we report high-resolution ALMA and VLBA observations to reveal a clear and consistent picture of an outflow associated with an O-type protostar candidate in the G26.50+0.28 region. These observations reveal, for the first time, a collimated jet located in the middle of the outflow cavity. The jet is found to be perpendicular to an elongated disk/toroid and its velocity gradient. The collimated jet appears to show a small amplitude (a & AP;0 & DEG;.06) counterclockwise precession, when looking along the blueshifted jet axis from the strongest continuum source MM1, with a precession length of 0.22 pc. The inclination of the jet is likely to be very low (& AP;8 & DEG;), which makes it a promising target to study its transverse morphologies and kinematics. However, no clear evidence of jet rotation is found in the ALMA and VLBA observations. The three-dimensional velocities of the water maser spots appear to show the same absolute speed with respect to different opening angles, suggesting the jet winds may be launched in a relatively small region. This favors the X-wind model, that is, jets are launched in a small area near the inner disk edge. |
| Keyword | ISM: jets and outflows stars: formation masers radio lines: ISM |
| DOI | 10.1051/0004-6361/202345893 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MOLECULAR OUTFLOWS ; ACCRETION DISKS ; JET ; STAR ; VELOCITY ; COLLIMATION ; PARALLAXES ; DRIVEN ; MASER ; AU |
| Funding Project | National Key R&D Program of China[2022YFA1603103] ; CAS Light ofWest China Program[2021-XBQNXZ-028] ; National Natural Science foundation of China[12103082] ; National Natural Science foundation of China[11603063] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A362] ; Youth Innovation Promotion Association CAS |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001065619100002 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | National Key R&D Program of China ; CAS Light ofWest China Program ; National Natural Science foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Youth Innovation Promotion Association CAS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5514 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Corresponding Author | Wu, Gang |
| Affiliation | 1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 4.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210034, Peoples R China 5.Nanjing Univ, Sch Astron & Space Sci, 163 Xianlin Ave, Nanjing 210023, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Wu, Gang,Henkel, Christian,Xu, Ye,et al. ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28[J]. ASTRONOMY & ASTROPHYSICS,2023,677:A80. |
| APA | Wu, Gang.,Henkel, Christian.,Xu, Ye.,Brunthaler, Andreas.,Menten, Karl M..,...&Esimbek, Jarken.(2023).ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28.ASTRONOMY & ASTROPHYSICS,677,A80. |
| MLA | Wu, Gang,et al."ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28".ASTRONOMY & ASTROPHYSICS 677(2023):A80. |
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| Wu-2023-ALMA and VLB（4330KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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