Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North
We report the detection of the disk/torus, outflow, and inflow structures traced by H _2 O masers toward a high-mass young stellar object W51 North during its H _2 O maser outburst stage using the Karl G. Jansky Very Large Array (VLA). It is found that the disk has a radius of ∼4000 au and an inclin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/acd84d |
| _version_ | 1797699072518258688 |
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| author | Yan-Kun Zhang Xi Chen Shi-Ming Song You-Xin Wang |
| author_facet | Yan-Kun Zhang Xi Chen Shi-Ming Song You-Xin Wang |
| author_sort | Yan-Kun Zhang |
| collection | DOAJ |
| description | We report the detection of the disk/torus, outflow, and inflow structures traced by H _2 O masers toward a high-mass young stellar object W51 North during its H _2 O maser outburst stage using the Karl G. Jansky Very Large Array (VLA). It is found that the disk has a radius of ∼4000 au and an inclination angle with respect to the sky plane of ∼60° by combining the VLA and the Atacama Large Millimeter/submillimeter Array data. Additionally, a peculiar flow perpendicular to the SiO bipolar outflow is detected in the H _2 O maser, SiO, and HC _3 N lines, which is newly-identified as an infalling streamer rather than an old outflow from this source, as reported in previous studies. Combining the VLA map and the Tianma radio telescope monitoring of the H _2 O masers suggests that the origin of the luminosity outburst of H _2 O masers during 2020 January–April is likely related to the energy release from the collision between the infalling streamer and the disk. This may provide an additional mechanism to account for the luminosity outburst or episodic accretion beyond disk fragmentation caused by gravitational instability. |
| first_indexed | 2024-03-12T04:03:13Z |
| format | Article |
| id | doaj.art-f8dcc1cb4c6e40198231e144ff91a614 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T04:03:13Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-f8dcc1cb4c6e40198231e144ff91a6142023-09-03T11:31:55ZengIOP PublishingThe Astronomical Journal1538-38812023-01-0116612110.3847/1538-3881/acd84dLuminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 NorthYan-Kun Zhang0https://orcid.org/0000-0001-7817-1975Xi Chen1https://orcid.org/0000-0002-5435-925XShi-Ming Song2https://orcid.org/0000-0003-3640-3875You-Xin Wang3https://orcid.org/0000-0001-9155-0777Center for Astrophysics, Guangzhou University , Guangzhou 510006, People’s Republic of China ; chenxi@gzhu.edu.cnCenter for Astrophysics, Guangzhou University , Guangzhou 510006, People’s Republic of China ; chenxi@gzhu.edu.cn; Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People’s Republic of ChinaCenter for Astrophysics, Guangzhou University , Guangzhou 510006, People’s Republic of China ; chenxi@gzhu.edu.cnCenter for Astrophysics, Guangzhou University , Guangzhou 510006, People’s Republic of China ; chenxi@gzhu.edu.cnWe report the detection of the disk/torus, outflow, and inflow structures traced by H _2 O masers toward a high-mass young stellar object W51 North during its H _2 O maser outburst stage using the Karl G. Jansky Very Large Array (VLA). It is found that the disk has a radius of ∼4000 au and an inclination angle with respect to the sky plane of ∼60° by combining the VLA and the Atacama Large Millimeter/submillimeter Array data. Additionally, a peculiar flow perpendicular to the SiO bipolar outflow is detected in the H _2 O maser, SiO, and HC _3 N lines, which is newly-identified as an infalling streamer rather than an old outflow from this source, as reported in previous studies. Combining the VLA map and the Tianma radio telescope monitoring of the H _2 O masers suggests that the origin of the luminosity outburst of H _2 O masers during 2020 January–April is likely related to the energy release from the collision between the infalling streamer and the disk. This may provide an additional mechanism to account for the luminosity outburst or episodic accretion beyond disk fragmentation caused by gravitational instability.https://doi.org/10.3847/1538-3881/acd84dStar formationInterstellar masersAstrophysical masersYoung stellar objectsProtostarsStellar accretion disks |
| spellingShingle | Yan-Kun Zhang Xi Chen Shi-Ming Song You-Xin Wang Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North The Astronomical Journal Star formation Interstellar masers Astrophysical masers Young stellar objects Protostars Stellar accretion disks |
| title | Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North |
| title_full | Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North |
| title_fullStr | Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North |
| title_full_unstemmed | Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North |
| title_short | Luminosity Outburst Energized by the Collision between the Infalling Streamer and Disk in W51 North |
| title_sort | luminosity outburst energized by the collision between the infalling streamer and disk in w51 north |
| topic | Star formation Interstellar masers Astrophysical masers Young stellar objects Protostars Stellar accretion disks |
| url | https://doi.org/10.3847/1538-3881/acd84d |
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