Accurate OH Maser Positions. II. the Galactic Center Region

We present high spatial resolution observations of ground-state OH masers achieved using the Australia Telescope Compact Array (ATCA). These observations were conducted toward 171 pointing centers where OH maser candidates were identified previously in the Southern Parkes Large-Area Survey in Hydrox...

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Detalles Bibliográficos
Autores: Qiao, Hai-Hua, Walsh, Andrew J., Breen, Shari L., Gómez, José F., Dawson, J.R., Imai, Hiroshi, Ellingsen, Simon P., Green, James A., Shen, Zhi-Qiang
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/212922
Acceso en línea:http://hdl.handle.net/10261/212922
Access Level:acceso abierto
Palabra clave:Catalogues
ISM: molecules
Masers
Radio lines: ISM
Stars: AGB and post-AGB
Stars: formation
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spelling Accurate OH Maser Positions. II. the Galactic Center RegionQiao, Hai-HuaWalsh, Andrew J.Breen, Shari L.Gómez, José F.Dawson, J.R.Imai, HiroshiEllingsen, Simon P.Green, James A.Shen, Zhi-QiangCataloguesISM: moleculesMasersRadio lines: ISMStars: AGB and post-AGBStars: formationWe present high spatial resolution observations of ground-state OH masers achieved using the Australia Telescope Compact Array (ATCA). These observations were conducted toward 171 pointing centers where OH maser candidates were identified previously in the Southern Parkes Large-Area Survey in Hydroxyl toward the Galactic center region between Galactic longitudes of 355 and 5 and Galactic latitudes of -2° and +2°. We detect maser emission toward 162 target fields and suggest that six out of nine nondetections are due to intrinsic variability. Due to the superior spatial resolution of the follow-up ATCA observations, we have identified 356 OH maser sites in the 162 target fields with maser detections. Almost half (161 of 356) of these maser sites have been detected for the first time in these observations. After comparing the positions of these 356 maser sites to the literature, we find that 269 (76%) sites are associated with evolved stars (two of which are PNe), 31 (9%) are associated with star formation, and four are associated with supernova remnants; we were unable to determine the origin of the remaining 52 (15%) sites. Unlike the pilot region, the infrared colors of evolved star sites with symmetric maser profiles in the 1612 MHz transition do not show obvious differences compared with those of evolved star sites with asymmetric maser profiles. © 2018. The American Astronomical Society. All rights reserved.The Australia Telescope Compact Array is part of the Australia Telescope, which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. This research has made use of NASA's Astrophysics Data System Abstract Service and the SIMBAD database, operated at CDS, Strasbourg, France. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA). This publication also makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California Institute of Technology, funded by NASA. H-HQ is partially supported by the Special Funding for Advanced Users, budgeted and administrated by the Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS-CAS), and CAS >Light of West China> Program. JFG is partially supported by MINECO (Spain) grants AYA2014-57369-C3-3 and AYA2017-84390-C2-1-R (cofunded by FEDER). This work was supported in part by the Major Program of the National Natural Science Foundation of China (grant Nos. 11590780 and 11590784) and the CAS Pioneer Hundred Talents Program (Technological excellence, Y650YC1201).IOP PublishingMinisterio de Economía y Competitividad (España)European CommissionAustralian GovernmentNASANational Natural Science Foundation of ChinaChinese Academy of SciencesConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020182020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/212922reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-57369-C3-3info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-84390-C2-1-Rhttp://dx.doi.org/10.3847/1538-4365/aae580Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2129222026-05-22T06:33:51Z
dc.title.none.fl_str_mv Accurate OH Maser Positions. II. the Galactic Center Region
title Accurate OH Maser Positions. II. the Galactic Center Region
spellingShingle Accurate OH Maser Positions. II. the Galactic Center Region
Qiao, Hai-Hua
Catalogues
ISM: molecules
Masers
Radio lines: ISM
Stars: AGB and post-AGB
Stars: formation
title_short Accurate OH Maser Positions. II. the Galactic Center Region
title_full Accurate OH Maser Positions. II. the Galactic Center Region
title_fullStr Accurate OH Maser Positions. II. the Galactic Center Region
title_full_unstemmed Accurate OH Maser Positions. II. the Galactic Center Region
title_sort Accurate OH Maser Positions. II. the Galactic Center Region
dc.creator.none.fl_str_mv Qiao, Hai-Hua
Walsh, Andrew J.
Breen, Shari L.
Gómez, José F.
Dawson, J.R.
Imai, Hiroshi
Ellingsen, Simon P.
Green, James A.
Shen, Zhi-Qiang
author Qiao, Hai-Hua
author_facet Qiao, Hai-Hua
Walsh, Andrew J.
Breen, Shari L.
Gómez, José F.
Dawson, J.R.
Imai, Hiroshi
Ellingsen, Simon P.
Green, James A.
Shen, Zhi-Qiang
author_role author
author2 Walsh, Andrew J.
Breen, Shari L.
Gómez, José F.
Dawson, J.R.
Imai, Hiroshi
Ellingsen, Simon P.
Green, James A.
Shen, Zhi-Qiang
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Commission
Australian Government
NASA
National Natural Science Foundation of China
Chinese Academy of Sciences
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Catalogues
ISM: molecules
Masers
Radio lines: ISM
Stars: AGB and post-AGB
Stars: formation
topic Catalogues
ISM: molecules
Masers
Radio lines: ISM
Stars: AGB and post-AGB
Stars: formation
description We present high spatial resolution observations of ground-state OH masers achieved using the Australia Telescope Compact Array (ATCA). These observations were conducted toward 171 pointing centers where OH maser candidates were identified previously in the Southern Parkes Large-Area Survey in Hydroxyl toward the Galactic center region between Galactic longitudes of 355 and 5 and Galactic latitudes of -2° and +2°. We detect maser emission toward 162 target fields and suggest that six out of nine nondetections are due to intrinsic variability. Due to the superior spatial resolution of the follow-up ATCA observations, we have identified 356 OH maser sites in the 162 target fields with maser detections. Almost half (161 of 356) of these maser sites have been detected for the first time in these observations. After comparing the positions of these 356 maser sites to the literature, we find that 269 (76%) sites are associated with evolved stars (two of which are PNe), 31 (9%) are associated with star formation, and four are associated with supernova remnants; we were unable to determine the origin of the remaining 52 (15%) sites. Unlike the pilot region, the infrared colors of evolved star sites with symmetric maser profiles in the 1612 MHz transition do not show obvious differences compared with those of evolved star sites with asymmetric maser profiles. © 2018. The American Astronomical Society. All rights reserved.
publishDate 2018
dc.date.none.fl_str_mv 2018
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/212922
url http://hdl.handle.net/10261/212922
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-57369-C3-3
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-84390-C2-1-R
http://dx.doi.org/10.3847/1538-4365/aae580
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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