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Water Fountain Sour...
Water Fountain Sources Monitored in FLASHING
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- Imai, Hiroshi (author)
- Kagoshima University
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- Amada, Kei (author)
- Kagoshima University
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- Gomez, J. F. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Uscanga, L. (author)
- Universidad de Guanajuato
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- Tafoya, Daniel, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nakashima, Keisuke (author)
- Kagoshima University
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- Shum, K. Y. (author)
- Kagoshima University
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- Hamae, Yuhki (author)
- Kagoshima University
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- Burns, R. A. (author)
- RIKEN,National Astronomical Observatory of Japan
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- Shibata, Yosuke (author)
- Kagoshima University
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- Kasai, Rina (author)
- Kagoshima University
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- Takashima, Miki (author)
- Kagoshima University
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- Orosz, G. (author)
- Joint Institute for VLBI in Europe (JIVE)
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(creator_code:org_t)
- 2022
- 2022
- English.
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In: Proceedings of the International Astronomical Union. - 1743-9213 .- 1743-9221. ; 18, s. 333-337
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https://doi.org/10.1...
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Abstract
Subject headings
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- We have investigated the spectral evolutions of H2O and SiO masers associated with 12 water fountain sources in our FLASHING (Finest Legacy Acquisitions of SiO-/H2O-maser Ignitions by Nobeyama Generation) project. Our monitoring observations have been conducted using the Nobeyama 45 m telescope every 2 weeks-2 months since 2018 December except during summer seasons. We have found new extremely high velocity H2O maser components, breaking the records of jet speeds in this type of sources. Systematic line-of-sight velocity drifts of the H2O maser spectral peaks have also been found, indicating acceleration of the entrained material hosting the masers around the jet. Moreover, by comparing with previous spectral data, we can find decadal growths/decays of H2O maser emission. Possible periodic variations of the maser spectra are further being inspected in order to explore the periodicity of the central stellar system (a pulsating star or a binary). Thus we expect to see the real-time evolution/devolutions of the water fountains over decades.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Vattenteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Water Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Keyword
- outflows
- stars: AGB and post-AGB
- stars: mass loss
- masers
- stars: winds
Publication and Content Type
- kon (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Imai, Hiroshi
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Amada, Kei
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Gomez, J. F.
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Uscanga, L.
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Tafoya, Daniel, ...
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Nakashima, Keisu ...
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show more...
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Shum, K. Y.
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Hamae, Yuhki
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Burns, R. A.
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Shibata, Yosuke
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Kasai, Rina
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Takashima, Miki
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Orosz, G.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Civil Engineerin ...
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and Water Engineerin ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Oceanography Hyd ...
- Articles in the publication
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Proceedings of t ...
- By the university
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Chalmers University of Technology