ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm

Context. Thanks to its excellent 5100 m high site in Chajnantor, the Atacama Pathfinder Experiment (APEX) systematically explores the southern sky at submillimeter wavelengths, in both continuum and spectral line emission. Studying continuum emission from interstellar dust is essential to locating t...

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Autores: Schuller, F., Contreras, Y., Bronfman, L., Garay, G., Mardones, D.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:Chile
Idioma:inglés
OAI Identifier:oai:repositorio.anid.cl:10533/237024
Acceso en línea:https://hdl.handle.net/10533/237024
Access Level:acceso abierto
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spelling Mardones, D.Garay, G.Bronfman, L.Contreras, Y.Schuller, F.200910.1051/0004-6361/200811568https://hdl.handle.net/10533/237024http://purl.org/coar/access_right/c_abf2ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μmSchuller, F.Contreras, Y.Bronfman, L.Garay, G.Mardones, D.2019-12-18T18:14:35Z2022-07-07T22:01:18Z2019-12-18T18:14:35Z2022-07-07T22:01:18Z2009Context. Thanks to its excellent 5100 m high site in Chajnantor, the Atacama Pathfinder Experiment (APEX) systematically explores the southern sky at submillimeter wavelengths, in both continuum and spectral line emission. Studying continuum emission from interstellar dust is essential to locating the highest density regions in the interstellar medium, and deriving their masses, column densities, density structures, and large-scale morphologies. In particular, the early stages of (massive) star formation remain poorly understood, mainly because only small samples of high-mass proto-stellar or young stellar objects have been studied in detail so far. Aims. Our goal is to produce a large-scale, systematic database of massive pre- and proto-stellar clumps in the Galaxy, to understand how and under what conditions star formation takes place. Only a systematic survey of the Galactic Plane can provide the statistical basis for unbiased studies. A well characterized sample of Galactic star-forming sites will deliver an evolutionary sequence and a mass function of high-mass, star-forming clumps. This systematic survey at submillimeter wavelengths also represents a preparatory work for Herschel and ALMA. Methods. The APEX telescope is ideally located to observe the inner Milky Way. The Large APEX Bolometer Camera (LABOCA) is a 295-element bolometer array observing at 870 μm, with a beam size of 19. 2. Taking advantage of its large field of view (11. 4) and excellent sensitivity, we started an unbiased survey of the entire Galactic Plane accessible to APEX, with a typical noise level of 50−70 mJy/beam: the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL). Results. As a first step, we covered ∼95 deg2 of the Galactic Plane. These data reveal ∼6000 compact sources brighter than 0.25 Jy, or 63 sources per square degree, as well as extended structures, many of them filamentary. About two thirds of the compact sources have no bright infrared counterpart, and some of them are likely to correspond to the precursors of (high-mass) proto-stars or protoclusters. Other compact sources harbor hot cores, compact Hii regions, or young embedded clusters, thus tracing more evolved stages after massive stars have formed. Assuming a typical distance of 5 kpc, most sources are clumps smaller than 1 pc with masses from a few 10 to a few 100 M . In this first introductory paper, we show preliminary results from these ongoing observations, and discuss the mid- and long-term perspectives of the survey.FONDAPFONDAP1501000315010003virtual::17168-1WOS:000269986100011https://hdl.handle.net/10533/237024enginstname: Conicytreponame: Repositorio Digital RI2.010.1051/0004-6361/200811568info:eu-repo/grantAgreement/Fondap/15010003http://repositorio.uchile.cl/handle/2250/126095Atribución-NoComercial-SinDerivadas 3.0 Chilehttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/info:eu-repo/semantics/openAccessATLASGAL – The APEX telescope large area survey of the galaxy at 870 μmAstronomy & AstrophysicsArticuloinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttps://hdl.handle.net/10533/237024http://purl.org/coar/resource_type/c_2df8fbb1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::17168-1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::17168-110533/237024oai:repositorio.anid.cl:10533/2370242023-07-24 18:35:56.051https://repositorio.anid.clRepositorio ANIDaletelier@anid.cl
dc.title.none.fl_str_mv ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
dc.title.journal.none.fl_str_mv Astronomy & Astrophysics
title ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
spellingShingle ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
Schuller, F.
title_short ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
title_full ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
title_fullStr ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
title_full_unstemmed ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
title_sort ATLASGAL – The APEX telescope large area survey of the galaxy at 870 μm
dc.creator.none.fl_str_mv Schuller, F.
Contreras, Y.
Bronfman, L.
Garay, G.
Mardones, D.
author Schuller, F.
author_facet Schuller, F.
Contreras, Y.
Bronfman, L.
Garay, G.
Mardones, D.
author_role author
author2 Contreras, Y.
Bronfman, L.
Garay, G.
Mardones, D.
author2_role author
author
author
author
description Context. Thanks to its excellent 5100 m high site in Chajnantor, the Atacama Pathfinder Experiment (APEX) systematically explores the southern sky at submillimeter wavelengths, in both continuum and spectral line emission. Studying continuum emission from interstellar dust is essential to locating the highest density regions in the interstellar medium, and deriving their masses, column densities, density structures, and large-scale morphologies. In particular, the early stages of (massive) star formation remain poorly understood, mainly because only small samples of high-mass proto-stellar or young stellar objects have been studied in detail so far. Aims. Our goal is to produce a large-scale, systematic database of massive pre- and proto-stellar clumps in the Galaxy, to understand how and under what conditions star formation takes place. Only a systematic survey of the Galactic Plane can provide the statistical basis for unbiased studies. A well characterized sample of Galactic star-forming sites will deliver an evolutionary sequence and a mass function of high-mass, star-forming clumps. This systematic survey at submillimeter wavelengths also represents a preparatory work for Herschel and ALMA. Methods. The APEX telescope is ideally located to observe the inner Milky Way. The Large APEX Bolometer Camera (LABOCA) is a 295-element bolometer array observing at 870 μm, with a beam size of 19. 2. Taking advantage of its large field of view (11. 4) and excellent sensitivity, we started an unbiased survey of the entire Galactic Plane accessible to APEX, with a typical noise level of 50−70 mJy/beam: the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL). Results. As a first step, we covered ∼95 deg2 of the Galactic Plane. These data reveal ∼6000 compact sources brighter than 0.25 Jy, or 63 sources per square degree, as well as extended structures, many of them filamentary. About two thirds of the compact sources have no bright infrared counterpart, and some of them are likely to correspond to the precursors of (high-mass) proto-stars or protoclusters. Other compact sources harbor hot cores, compact Hii regions, or young embedded clusters, thus tracing more evolved stages after massive stars have formed. Assuming a typical distance of 5 kpc, most sources are clumps smaller than 1 pc with masses from a few 10 to a few 100 M . In this first introductory paper, we show preliminary results from these ongoing observations, and discuss the mid- and long-term perspectives of the survey.
publishDate 2009
dc.date.issued.none.fl_str_mv 2009
dc.date.accessioned.none.fl_str_mv 2019-12-18T18:14:35Z
2022-07-07T22:01:18Z
dc.date.available.none.fl_str_mv 2019-12-18T18:14:35Z
2022-07-07T22:01:18Z
dc.type.none.fl_str_mv Articulo
dc.type.driver.none.fl_str_mv info:eu-repo/semantics/article
dc.type.openaire.none.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.folio.none.fl_str_mv 15010003
15010003
dc.identifier.idwos.none.fl_str_mv WOS:000269986100011
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10533/237024
identifier_str_mv 15010003
WOS:000269986100011
url https://hdl.handle.net/10533/237024
dc.language.iso.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv instname: Conicyt
reponame: Repositorio Digital RI2.0
dc.relation.doi.none.fl_str_mv 10.1051/0004-6361/200811568
dc.relation.projectid.none.fl_str_mv info:eu-repo/grantAgreement/Fondap/15010003
dc.relation.uri.none.fl_str_mv http://repositorio.uchile.cl/handle/2250/126095
dc.rights.none.fl_str_mv Atribución-NoComercial-SinDerivadas 3.0 Chile
http://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rights.driver.none.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial-SinDerivadas 3.0 Chile
http://creativecommons.org/licenses/by-nc-nd/3.0/cl/
eu_rights_str_mv openAccess
repository.name.fl_str_mv Repositorio ANID
repository.mail.fl_str_mv aletelier@anid.cl
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