A proper motion catalogue for the Milky Way’s nuclear stellar disc

We present the results of a large-scale proper motion study of the central ∼36′ × 16′ of the Milky Way, based on our high angular resolution GALACTICNUCLEUS survey (epoch 2015) combined with the HST Paschen-α survey (epoch 2008). Our catalogue contains roughly 80 000 stars, an unprecedented kinemati...

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Autores: Shahzamanian, B., Schödel, Rainer, Nogueras-Lara, Francisco, Martínez-Arranz, Á., Sormani, M. C., Gallego Calvente, Teresa, Gallego Cano, Eulalia, Alburai, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/275270
Acceso en línea:http://hdl.handle.net/10261/275270
Access Level:acceso abierto
Palabra clave:Galaxy: center
Galaxy: structure
Infrared: general
Proper motions
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spelling A proper motion catalogue for the Milky Way’s nuclear stellar discShahzamanian, B.Schödel, RainerNogueras-Lara, FranciscoMartínez-Arranz, Á.Sormani, M. C.Gallego Calvente, TeresaGallego Cano, EulaliaAlburai, A.Galaxy: centerGalaxy: structureInfrared: generalProper motionsWe present the results of a large-scale proper motion study of the central ∼36′ × 16′ of the Milky Way, based on our high angular resolution GALACTICNUCLEUS survey (epoch 2015) combined with the HST Paschen-α survey (epoch 2008). Our catalogue contains roughly 80 000 stars, an unprecedented kinematic dataset for this region. We describe the data analysis and the preparation of the proper motion catalogue. We verify the catalogue by comparing our results with measurements from previous work and data. We provide a preliminary analysis of the kinematics of the studied region. Foreground stars in the Galactic disc can be easily identified via their low reddening. Consistent with previous work and with our expectations, we find that stars in the nuclear stellar disc have a smaller velocity dispersion than inner bulge stars, in particular in the direction perpendicular to the Galactic plane. The rotation of the nuclear stellar disc can be clearly seen in the proper motions parallel to the Galactic plane. Stars on the near side of the nuclear stellar disc are less reddened than stars on its far side. Proper motions enable us to detect co-moving groups of stars that may be associated with young clusters dissolving in the galactic centre that are difficult to detect by other means. We demonstrate a technique based on a density clustering algorithm that can be used to find such groups of stars. © ESO 2022.B.Sh., R.S., and A.T.G.C. acknowledge financial support from the State Agency for Research of the Spanish MCIU through the “Center of Excellence Severo Ocho” award for the Instituto de Astrofísica de Andalucía (SEV-2017-0709). B.Sh., A.T.G.C., A.A., and R.S. acknowledge financial support from national project PGC2018-095049-B-C21 (MCIU/AEI/FEDER, UE). F.N.L. and M.C.S. gratefully acknowledge support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) Project-ID 138713538 SFB 881 (The Milky Way System, subproject B8). M.C.S. furthermore acknowledges support from the ERC via the ERC Synergy Grant “ECOGAL” (grant 855130). F.N.L. acknowledges the sponsorship provided by the Federal Ministry for Education and Research of Germany through the Alexander von Humboldt Foundation. This work is based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programmes IDs 195.B-0283. We thank the staff of ESO for their great efforts and helpfulness. This research is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs 11671, 12318, 12667, and 14613.Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)European CommissionEuropean Research CouncilGerman Research FoundationConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/275270reponame: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/MICINN//SEV-2017-0709info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-095049-B-C21http://dx.doi.org/10.1051/0004-6361/202142687Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2752702026-05-22T06:33:51Z
dc.title.none.fl_str_mv A proper motion catalogue for the Milky Way’s nuclear stellar disc
title A proper motion catalogue for the Milky Way’s nuclear stellar disc
spellingShingle A proper motion catalogue for the Milky Way’s nuclear stellar disc
Shahzamanian, B.
Galaxy: center
Galaxy: structure
Infrared: general
Proper motions
title_short A proper motion catalogue for the Milky Way’s nuclear stellar disc
title_full A proper motion catalogue for the Milky Way’s nuclear stellar disc
title_fullStr A proper motion catalogue for the Milky Way’s nuclear stellar disc
title_full_unstemmed A proper motion catalogue for the Milky Way’s nuclear stellar disc
title_sort A proper motion catalogue for the Milky Way’s nuclear stellar disc
dc.creator.none.fl_str_mv Shahzamanian, B.
Schödel, Rainer
Nogueras-Lara, Francisco
Martínez-Arranz, Á.
Sormani, M. C.
Gallego Calvente, Teresa
Gallego Cano, Eulalia
Alburai, A.
author Shahzamanian, B.
author_facet Shahzamanian, B.
Schödel, Rainer
Nogueras-Lara, Francisco
Martínez-Arranz, Á.
Sormani, M. C.
Gallego Calvente, Teresa
Gallego Cano, Eulalia
Alburai, A.
author_role author
author2 Schödel, Rainer
Nogueras-Lara, Francisco
Martínez-Arranz, Á.
Sormani, M. C.
Gallego Calvente, Teresa
Gallego Cano, Eulalia
Alburai, A.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
European Commission
European Research Council
German Research Foundation
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxy: center
Galaxy: structure
Infrared: general
Proper motions
topic Galaxy: center
Galaxy: structure
Infrared: general
Proper motions
description We present the results of a large-scale proper motion study of the central ∼36′ × 16′ of the Milky Way, based on our high angular resolution GALACTICNUCLEUS survey (epoch 2015) combined with the HST Paschen-α survey (epoch 2008). Our catalogue contains roughly 80 000 stars, an unprecedented kinematic dataset for this region. We describe the data analysis and the preparation of the proper motion catalogue. We verify the catalogue by comparing our results with measurements from previous work and data. We provide a preliminary analysis of the kinematics of the studied region. Foreground stars in the Galactic disc can be easily identified via their low reddening. Consistent with previous work and with our expectations, we find that stars in the nuclear stellar disc have a smaller velocity dispersion than inner bulge stars, in particular in the direction perpendicular to the Galactic plane. The rotation of the nuclear stellar disc can be clearly seen in the proper motions parallel to the Galactic plane. Stars on the near side of the nuclear stellar disc are less reddened than stars on its far side. Proper motions enable us to detect co-moving groups of stars that may be associated with young clusters dissolving in the galactic centre that are difficult to detect by other means. We demonstrate a technique based on a density clustering algorithm that can be used to find such groups of stars. © ESO 2022.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/275270
url http://hdl.handle.net/10261/275270
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/MICINN//SEV-2017-0709
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-095049-B-C21
http://dx.doi.org/10.1051/0004-6361/202142687
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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 15.812429

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