Neutral gas outflows in nearby [U]LIRGs via optical NaD feature

We studied the properties of the neutral gas in a sample of 38 local luminous and ultra luminous infrared galaxies ([U]LIRGs, 51 individual galaxies at z ≤ 0:09), which mainly covers the less explored LIRG luminosity range. This study is based on the analysis of the spatially integrated and spatiall...

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Detalles Bibliográficos
Autores: Cazzoli, S., Arribas-Mocoroa, Santiago, Maiolino, R., Colina, Luis
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/199302
Acceso en línea:http://hdl.handle.net/10261/199302
Access Level:acceso abierto
Palabra clave:Galaxies: starburst
ISM: jets and outflows
ISM: kinematics and dynamics
Techniques: spectroscopic
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spelling Neutral gas outflows in nearby [U]LIRGs via optical NaD featureCazzoli, S.Arribas-Mocoroa, SantiagoMaiolino, R.Colina, LuisGalaxies: starburstISM: jets and outflowsISM: kinematics and dynamicsTechniques: spectroscopicWe studied the properties of the neutral gas in a sample of 38 local luminous and ultra luminous infrared galaxies ([U]LIRGs, 51 individual galaxies at z ≤ 0:09), which mainly covers the less explored LIRG luminosity range. This study is based on the analysis of the spatially integrated and spatially resolved spectra of the NaDλλ 5890, 5896 Å feature obtained with the integral field unit (IFU) of VIMOS at the Very Large Telescope. Analyzing spatially integrated spectra, we find that the contribution of the stars to the observed NaD equivalent width is small (<35%) for about half of the sample, and therefore this feature is dominated by inter stellar medium (ISM) absorption. After subtracting the stellar contribution, we find that the pure-ISM integrated spectra generally show blueshifted NaD profiles, indicating neutral gas outflow velocities, V, in the range 65-260 km s. Excluding the galaxies with powerful AGNs, V shows a dependency with the star formation rate (SFR) of the type V ∝ SFR, which is in rather good agreement with previous results. The spatially resolved analysis could be performed for 40 galaxies, 22 of which have neutral gas velocity fields dominated by noncircular motions with signatures of cone-like winds. However, a large number of targets (11/40) show disk rotation signatures. Based on a simple model, we found that the wind masses are in the range 0.4-7.5 × 10 M, reaching up to ~3% of the dynamical mass of the host. The mass rates are typically only ~0.2-0.4 times the corresponding global SFR indicating that, in general, the mass loss is too small to slow down the star formation significantly. In the majority of cases, the velocity of the outflowing gas is not sufficient to escape the host potential well and, therefore, most of the gas rains back into the galaxy disk. On average V/v is higher in less massive galaxies, confirming that the galaxy mass has a primary role in shaping the recycling of gas and metals. The comparison between the wind power and kinetic power of the starburst associated with SNe indicates that only the starburst could drive the outflows in nearly all the [U]LIRGs galaxies, as the wind power is generally lower than 20% of the kinetic power supplied by the starburst. The contribution of an active galactic nuclei (AGN) is, in principle, significant in two cases.This work was funded by the Marie Curie Initial Training Network ELIXIR of the European Commission under contract PITN- GA-2008-214227 and the grants AYA2010-21161-C02-01 and AYA2012-32295 by the Spanish Ministry of Science and Innovation (MICINN). S.C. gratefully acknowledges the logistic and financial support provided by the Cavendish Laboratory (Cambridge, UK)EDP SciencesEuropean CommissionMinisterio de Ciencia e Innovación (España)Cavendish Laboratory (UK)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020162020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/199302reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1051/0004-6361/201526788Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1993022026-05-22T06:33:51Z
dc.title.none.fl_str_mv Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
title Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
spellingShingle Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
Cazzoli, S.
Galaxies: starburst
ISM: jets and outflows
ISM: kinematics and dynamics
Techniques: spectroscopic
title_short Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
title_full Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
title_fullStr Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
title_full_unstemmed Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
title_sort Neutral gas outflows in nearby [U]LIRGs via optical NaD feature
dc.creator.none.fl_str_mv Cazzoli, S.
Arribas-Mocoroa, Santiago
Maiolino, R.
Colina, Luis
author Cazzoli, S.
author_facet Cazzoli, S.
Arribas-Mocoroa, Santiago
Maiolino, R.
Colina, Luis
author_role author
author2 Arribas-Mocoroa, Santiago
Maiolino, R.
Colina, Luis
author2_role author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Ciencia e Innovación (España)
Cavendish Laboratory (UK)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: starburst
ISM: jets and outflows
ISM: kinematics and dynamics
Techniques: spectroscopic
topic Galaxies: starburst
ISM: jets and outflows
ISM: kinematics and dynamics
Techniques: spectroscopic
description We studied the properties of the neutral gas in a sample of 38 local luminous and ultra luminous infrared galaxies ([U]LIRGs, 51 individual galaxies at z ≤ 0:09), which mainly covers the less explored LIRG luminosity range. This study is based on the analysis of the spatially integrated and spatially resolved spectra of the NaDλλ 5890, 5896 Å feature obtained with the integral field unit (IFU) of VIMOS at the Very Large Telescope. Analyzing spatially integrated spectra, we find that the contribution of the stars to the observed NaD equivalent width is small (<35%) for about half of the sample, and therefore this feature is dominated by inter stellar medium (ISM) absorption. After subtracting the stellar contribution, we find that the pure-ISM integrated spectra generally show blueshifted NaD profiles, indicating neutral gas outflow velocities, V, in the range 65-260 km s. Excluding the galaxies with powerful AGNs, V shows a dependency with the star formation rate (SFR) of the type V ∝ SFR, which is in rather good agreement with previous results. The spatially resolved analysis could be performed for 40 galaxies, 22 of which have neutral gas velocity fields dominated by noncircular motions with signatures of cone-like winds. However, a large number of targets (11/40) show disk rotation signatures. Based on a simple model, we found that the wind masses are in the range 0.4-7.5 × 10 M, reaching up to ~3% of the dynamical mass of the host. The mass rates are typically only ~0.2-0.4 times the corresponding global SFR indicating that, in general, the mass loss is too small to slow down the star formation significantly. In the majority of cases, the velocity of the outflowing gas is not sufficient to escape the host potential well and, therefore, most of the gas rains back into the galaxy disk. On average V/v is higher in less massive galaxies, confirming that the galaxy mass has a primary role in shaping the recycling of gas and metals. The comparison between the wind power and kinetic power of the starburst associated with SNe indicates that only the starburst could drive the outflows in nearly all the [U]LIRGs galaxies, as the wind power is generally lower than 20% of the kinetic power supplied by the starburst. The contribution of an active galactic nuclei (AGN) is, in principle, significant in two cases.
publishDate 2016
dc.date.none.fl_str_mv 2016
2020
2020
2020
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/10261/199302
url http://hdl.handle.net/10261/199302
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1051/0004-6361/201526788
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 15,81155

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