SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A
We report here the first mapping of SiO v = 1 J = 5 → 4 maser emission toward the “water fountain” source W 43A in order to explore the central stellar system driving the collimated, bipolar, fast jet. The maser source has a systemic line-of-sight velocity consistent with that of CO J = 2 → 1 emis...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/adde4e |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850112266769268736 |
|---|---|
| author | Hiroshi Imai Takeshi Hoshino Daniel Tafoya José F. Gómez Jun-ichi Nakashima Gabor Orosz |
| author_facet | Hiroshi Imai Takeshi Hoshino Daniel Tafoya José F. Gómez Jun-ichi Nakashima Gabor Orosz |
| author_sort | Hiroshi Imai |
| collection | DOAJ |
| description | We report here the first mapping of SiO v = 1 J = 5 → 4 maser emission toward the “water fountain” source W 43A in order to explore the central stellar system driving the collimated, bipolar, fast jet. The maser source has a systemic line-of-sight velocity consistent with that of CO J = 2 → 1 emission tracing the jet within ∼2 km s ^−1 but a velocity gradient opposite that of the jet. The dynamical center of the maser source is located within ∼10 mas (or ∼20 au) of the brightness peak of the central 1.3 mm continuum emission. The spatiokinematic properties of the SiO J = 5 → 4 and J = 1 → 0 masers suggest that they are associated with the root of a slow (10 km s ^−1 < V _outflow << 100 km s ^−1 ) outflow with a large opening angle, and the central stellar system is contained within the inner maser region (∼20 au) during a possible common-envelope evolution. |
| format | Article |
| id | doaj-art-71a11b6074644c1fab09ef5d1310e356 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-71a11b6074644c1fab09ef5d1310e3562025-08-20T02:37:25ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01987211410.3847/1538-4357/adde4eSiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43AHiroshi Imai0https://orcid.org/0000-0002-0880-0091Takeshi Hoshino1Daniel Tafoya2https://orcid.org/0000-0002-2149-2660José F. Gómez3https://orcid.org/0000-0002-7065-542XJun-ichi Nakashima4https://orcid.org/0000-0003-3324-9462Gabor Orosz5https://orcid.org/0000-0002-5526-990XAmanogawa Galaxy Astronomy Research Center, Graduate School of Science and Engineering, Kagoshima University , 1-12-35 Korimoto, Kagoshima 890-0065, Japan ; hiroimai@km.kagoshima-u.ac.jp; Center for General Education, Institute for Comprehensive Education, Kagoshima University , 1-12-30 Korimoto, Kagoshima 890-0065, JapanFaculty of Science, Kagoshima University , 1-12-35 Korimoto, Kagoshima 890-0065, JapanDepartment of Space, Earth and Environment, Chalmers University of Technology , Onsala Space Observatory, 439 92 Onsala, SwedenInstituto de Astrofísica de Andalucía , CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, SpainSchool of Physics and Astronomy, Sun Yat-sen University , Tang Jia Wan, Zhuhai 519082, People’s Republic of China; CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area, 67 Sun Yat-Sen University , 2 Duxue Road, Zhuhai 519082, Guangdong Province, People’s Republic of ChinaJoint Institute for VLBI ERIC , Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The NetherlandsWe report here the first mapping of SiO v = 1 J = 5 → 4 maser emission toward the “water fountain” source W 43A in order to explore the central stellar system driving the collimated, bipolar, fast jet. The maser source has a systemic line-of-sight velocity consistent with that of CO J = 2 → 1 emission tracing the jet within ∼2 km s ^−1 but a velocity gradient opposite that of the jet. The dynamical center of the maser source is located within ∼10 mas (or ∼20 au) of the brightness peak of the central 1.3 mm continuum emission. The spatiokinematic properties of the SiO J = 5 → 4 and J = 1 → 0 masers suggest that they are associated with the root of a slow (10 km s ^−1 < V _outflow << 100 km s ^−1 ) outflow with a large opening angle, and the central stellar system is contained within the inner maser region (∼20 au) during a possible common-envelope evolution.https://doi.org/10.3847/1538-4357/adde4eCircumstellar masersStellar jetsStellar mass lossCommon envelope evolution |
| spellingShingle | Hiroshi Imai Takeshi Hoshino Daniel Tafoya José F. Gómez Jun-ichi Nakashima Gabor Orosz SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A The Astrophysical Journal Circumstellar masers Stellar jets Stellar mass loss Common envelope evolution |
| title | SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A |
| title_full | SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A |
| title_fullStr | SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A |
| title_full_unstemmed | SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A |
| title_short | SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A |
| title_sort | sio v 1 j 5 4 maser emission from the root of the water fountain source w 43a |
| topic | Circumstellar masers Stellar jets Stellar mass loss Common envelope evolution |
| url | https://doi.org/10.3847/1538-4357/adde4e |
| work_keys_str_mv | AT hiroshiimai siov1j54maseremissionfromtherootofthewaterfountainsourcew43a AT takeshihoshino siov1j54maseremissionfromtherootofthewaterfountainsourcew43a AT danieltafoya siov1j54maseremissionfromtherootofthewaterfountainsourcew43a AT josefgomez siov1j54maseremissionfromtherootofthewaterfountainsourcew43a AT junichinakashima siov1j54maseremissionfromtherootofthewaterfountainsourcew43a AT gabororosz siov1j54maseremissionfromtherootofthewaterfountainsourcew43a |