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Interferometric Observations of the Water Fountain Candidates OH 16.3−3.0 and IRAS 19356+0754

Published online by Cambridge University Press:  07 February 2024

P. Chacón Open the ORCID record for P. Chacón [Opens in a new window] ,
L. Uscanga Open the ORCID record for L. Uscanga [Opens in a new window] ,
H. Imai Open the ORCID record for H. Imai [Opens in a new window] ,
B. H. K. Yung ,
J. F. Gómez ,
J. R. Rizzo ,
O. Suárez ,
L. F. Miranda ,
G. Anglada  and
J. M. Torrelles
P. Chacón*
Affiliation:
DA, University of Guanajuato, A.P. 144, 36000 Guanajuato, Gto., Mexico.
L. Uscanga
Affiliation:
DA, University of Guanajuato, A.P. 144, 36000 Guanajuato, Gto., Mexico.
H. Imai
Affiliation:
AGARC, GSSE, Kagoshima University, 1-21-35, Korimoto, Kagoshima 890-0065 Japan CGE, ICE, Kagoshima University, Japan
B. H. K. Yung
Affiliation:
NCAC, ul. Rabiańska 8, 87-100 Toruń Poland
J. F. Gómez
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
J. R. Rizzo
Affiliation:
CAB, INTA-CSIC, Ctra de Torrejón a Ajalvir, km 4, 28850 Torrejón de Ardoz, Madrid, Spain
O. Suárez
Affiliation:
Observatoire de la Côte dAzur, UCA, Nice, France
L. F. Miranda
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
G. Anglada
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
J. M. Torrelles
Affiliation:
ICE, CSIC, Carrer de Can Magrans, s/n 08193 Barcelona, Spain
*
email: [email protected]
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Abstract

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Water Fountains (WFs), located between the AGB and PN phases of stellar evolution, may provide significant clues on the shaping process of PNe. We present new VLA observations of the WF candidates OH 16.3-3.0 and IRAS 19356+0754. We detect H2O and OH maser and radio continuum emission towards OH 16.3-3.0. We suggest that the OH maser emission of OH 16.3-3.0 is associated with an aspherical circumstellar envelope due to its spatio-kinematics and peculiar spectral profile. We could not confirm the candidates as bona fide WFs because of the narrow velocity spread (OH 16.3-3.0) or non-detection (IRAS 19356+0754) of H2O maser emission. Further monitoring could help to discern their nature.

Keywords

masersstars: AGB and post-AGB
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. 362 - 364
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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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