The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale

Puspitarini, L. et al.--Full list of authors: Puspitarini, L.; Lallement, R.; Babusiaux, C.; Chen, H. -C.; Bonifacio, P.; Sbordone, L.; Caffau, E.; Duffau, S.; Hill, V.; Monreal-Ibero, A.; Royer, F.; Arenou, F.; Peralta, R.; Drew, J. E.; Bonito, R.; Lopez-Santiago, J.; Alfaro, E. J.; Bensby, T.; Bra...

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Detalhes bibliográficos
Autores: Puspitarini, L., Alfaro, Emilio J., Costado, M. T.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/388026
Acesso em linha:http://hdl.handle.net/10261/388026
Access Level:acceso abierto
Palavra-chave:ISM: general
Dust, extinction
ISM: lines and bands
Galaxy: general
id ES_4ff7f05eca7c8a45bd67780c947868a2
oai_identifier_str oai:digital.csic.es:10261/388026
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
title The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
spellingShingle The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
Puspitarini, L.
ISM: general
Dust, extinction
ISM: lines and bands
Galaxy: general
title_short The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
title_full The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
title_fullStr The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
title_full_unstemmed The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
title_sort The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scale
dc.creator.none.fl_str_mv Puspitarini, L.
Alfaro, Emilio J.
Costado, M. T.
author Puspitarini, L.
author_facet Puspitarini, L.
Alfaro, Emilio J.
Costado, M. T.
author_role author
author2 Alfaro, Emilio J.
Costado, M. T.
author2_role author
author
dc.contributor.none.fl_str_mv Agence Nationale de la Recherche (France)
German Research Foundation
Ministerio de Economía, Fomento y Turismo (Chile)
European Commission
European Research Council
Leverhulme Trust
Istituto Nazionale di Astrofisica
Ministero dell'Istruzione, dell'Università e della Ricerca
European Science Foundation
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv ISM: general
Dust, extinction
ISM: lines and bands
Galaxy: general
topic ISM: general
Dust, extinction
ISM: lines and bands
Galaxy: general
description Puspitarini, L. et al.--Full list of authors: Puspitarini, L.; Lallement, R.; Babusiaux, C.; Chen, H. -C.; Bonifacio, P.; Sbordone, L.; Caffau, E.; Duffau, S.; Hill, V.; Monreal-Ibero, A.; Royer, F.; Arenou, F.; Peralta, R.; Drew, J. E.; Bonito, R.; Lopez-Santiago, J.; Alfaro, E. J.; Bensby, T.; Bragaglia, A.; Flaccomio, E.; Lanzafame, A. C.; Pancino, E.; Recio-Blanco, A.; Smiljanic, R.; Costado, M. T.; Lardo, C.; de Laverny, P.; Zwitter, T.
publishDate 2015
dc.date.none.fl_str_mv 2015
2025
2025
2025
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/10261/388026
url http://hdl.handle.net/10261/388026
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/320360
http://dx.doi.org/10.1051/0004-6361/201424391
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
_version_ 1869407852509003777
spelling The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra: DIB-based interstellar medium line-of-sight structures at the kpc scalePuspitarini, L.Alfaro, Emilio J.Costado, M. T.ISM: generalDust, extinctionISM: lines and bandsGalaxy: generalPuspitarini, L. et al.--Full list of authors: Puspitarini, L.; Lallement, R.; Babusiaux, C.; Chen, H. -C.; Bonifacio, P.; Sbordone, L.; Caffau, E.; Duffau, S.; Hill, V.; Monreal-Ibero, A.; Royer, F.; Arenou, F.; Peralta, R.; Drew, J. E.; Bonito, R.; Lopez-Santiago, J.; Alfaro, E. J.; Bensby, T.; Bragaglia, A.; Flaccomio, E.; Lanzafame, A. C.; Pancino, E.; Recio-Blanco, A.; Smiljanic, R.; Costado, M. T.; Lardo, C.; de Laverny, P.; Zwitter, T.Aims. We study how diffuse interstellar bands (DIBs) measured toward distance-distributed target stars can be used to locate dense interstellar (IS) clouds in the Galaxy and probe a line-of-sight (LOS) kinematical structure, a potentially useful tool when gaseous absorption lines are saturated or not available in the spectral range. Cool target stars are numerous enough for this purpose. Methods. We devised automated DIB-fitting methods appropriate for cool star spectra and multiple IS components. The data were fitted with a combination of a synthetic stellar spectrum, a synthetic telluric transmission, and empirical DIB profiles. The initial number of DIB components and their radial velocity were guided by HI 21 cm emission spectra, or, when available in the spectral range, IS neutral sodium absorption lines. For NaI, radial velocities of NaI lines and DIBs were maintained linked during a global simultaneous fit. In parallel, stellar distances and extinctions were estimated self-consistently by means of a 2D Bayesian method from spectroscopically-derived stellar parameters and photometric data. Results. We have analyzed Gaia-ESO Survey (GES) spectra of 225 stars that probe between ∼2 and 10 kpc long LOS in five different regions of the Milky Way. The targets are the two CoRoT fields, two open clusters (NGC 4815 and γ Vel), and the Galactic bulge. Two OGLE fields toward the bulge observed before the GES are also included (205 target stars). Depending on the observed spectral intervals, we extracted one or more of the following DIBs: λλ 6283.8, 6613.6, and 8620.4. For each field, we compared the DIB strengths with the Bayesian distances and extinctions, and the DIB Doppler velocities with the HI emission spectra. Conclusions. For all fields, the DIB strength and the target extinction are well correlated. For targets that are widely distributed in distance, marked steps in DIBs and extinction radial distance profiles match each other and broadly correspond to the expected locations of spiral arms. For all fields, the DIB velocity structure agrees with HI emission spectra, and all detected DIBs correspond to strong NaI lines. This illustrates how DIBs can be used to locate the Galactic interstellar gas and to study its kinematics at the kpc scale, as illustrated by Local and Perseus Arm DIBs that differ by ≳∼30 km s-1, in agreement with HI emission spectra. On the other hand, if most targets are located beyond the main absorber, DIBs can trace the differential reddening within the field. © ESO 2014.R.L, L. P., C. B., F. A., and A.M-I. acknowledge support from the French National Research Agency (ANR) through the STILISM project. L. S. and S. D. acknowledge the support of Sonderforschungsbereich SFB 881 “The Milky Way system” (subprojects A4 and A5) of the German Research Foundation (DFG), and of Project IC120009 “Millennium Institute of Astrophysics (MAS)” of Iniciativa Cientfica Milenio del Ministerio de Economa, Fomento y Turismo de Chile. E. C. is grateful to the FONDATION MERAC for funding her fellowship. This work was partly supported by the European Union FP7 programme through ERC grant number 320360 and by the Leverhulme Trust through grant RPG-2012-541. We acknowledge the support from INAF and Ministero dell’ Istruzione, dell’ Università’ e della Ricerca (MIUR) in the form of the grant “Premiale VLT 2012”. The results presented here benefit from discussions held during the Gaia-ESO workshops and conferences supported by the ESF (European Science Foundation) through the GREAT Research Network Programme.EDP SciencesAgence Nationale de la Recherche (France)German Research FoundationMinisterio de Economía, Fomento y Turismo (Chile)European CommissionEuropean Research CouncilLeverhulme TrustIstituto Nazionale di AstrofisicaMinistero dell'Istruzione, dell'Università e della RicercaEuropean Science FoundationConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520152025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/388026reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/320360http://dx.doi.org/10.1051/0004-6361/201424391Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3880262026-05-22T06:33:51Z
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