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Discovery of SiO masers in the “Water Fountain” source, IRAS 16552–3050

Published online by Cambridge University Press:  07 February 2024

Kei Amada Open the ORCID record for Kei Amada [Opens in a new window] ,
Hiroshi Imai Open the ORCID record for Hiroshi Imai [Opens in a new window] ,
Yuhki Hamae ,
Keisuke Nakashima Open the ORCID record for Keisuke Nakashima [Opens in a new window] ,
Ka-Yiu Shum Open the ORCID record for Ka-Yiu Shum [Opens in a new window] ,
Daniel Tafoya ,
Lucero Uscanga Open the ORCID record for Lucero Uscanga [Opens in a new window] ,
José F. Gómez Open the ORCID record for José F. Gómez [Opens in a new window] ,
Gabor Orosz Open the ORCID record for Gabor Orosz [Opens in a new window]  and
Ross A. Burns Open the ORCID record for Ross A. Burns [Opens in a new window]
Kei Amada*
Affiliation:
Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan.
Hiroshi Imai
Affiliation:
Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan. Amanogawa Galaxy Astronomy Research Center, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan Center for General Education, Institute for Comprehensive Education, Kagoshima University, 1-21-30 Korimoto, Kagoshima 890-0065, Japan
Yuhki Hamae
Affiliation:
Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
Keisuke Nakashima
Affiliation:
Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan.
Ka-Yiu Shum
Affiliation:
Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan.
Daniel Tafoya
Affiliation:
Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden
Lucero Uscanga
Affiliation:
Departamento de Astronomía, Universidad de Guanajuato, A.P. 144, 36000 Guanajuato, Gto., Mexico
José F. Gómez
Affiliation:
Instituto de Astrofísica de Andaluca, CSIC, Glorieta de la Astronoma s/n, E-18008 Granada, Spain
Gabor Orosz
Affiliation:
Joint Institute for VLBI ERIC, Dwingeloo 7900, Netherlands
Ross A. Burns
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan RIKEN, Wako, Saitama 351-0198, Japan
*
email: [email protected]
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Abstract

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We report new detections of SiO ν = 1 and ν = 2 J = 1 → 0 masers in the “water fountain” source IRAS 16552-3050, which was observed with the Nobeyama 45 m telescope from March 2021 to April 2023. Water fountains are evolved stars whose H2O maser spectra trace high-velocity outflows of >100 Km s−. This is the second known case of SiO masers in a water fountain, after their prototypical source, W 43A. The line-of-sight velocity of the SiO masers are blue-shifted by ∼25 km s−1 from the systemic velocity. This velocity offset imply that the SiO masers are associated with nozzle structure formed by a jet penetrating the circumstellar envelope, and that new gas blobs of the jet erupted recently. Thus, the SiO masers imply this star to be in a new evolutionary stage.

Keywords

masersstars: AGB and post-AGBstars: mass lossstars: windsoutfows
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 359 - 361
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

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