VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*

Astronomy and Astrophysics 577 (2013): A59 reproduced with permission from Astronomy and Astrophysics

Detalles Bibliográficos
Autores: Bellocchi, Enrica, Arribas, Santiago, Colina, Luis, Miralles-Caballero, Daniel
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/662511
Acceso en línea:http://hdl.handle.net/10486/662511
https://dx.doi.org/10.1051/0004-6361/201221019
Access Level:acceso abierto
Palabra clave:Galaxy: evolution
Galaxy: kinematics and dynamics
Física
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oai_identifier_str oai:repositorio.uam.es:10486/662511
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
title VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
spellingShingle VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
Bellocchi, Enrica
Galaxy: evolution
Galaxy: kinematics and dynamics
Física
title_short VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
title_full VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
title_fullStr VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
title_full_unstemmed VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
title_sort VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*
dc.creator.none.fl_str_mv Bellocchi, Enrica
Arribas, Santiago
Colina, Luis
Miralles-Caballero, Daniel
author Bellocchi, Enrica
author_facet Bellocchi, Enrica
Arribas, Santiago
Colina, Luis
Miralles-Caballero, Daniel
author_role author
author2 Arribas, Santiago
Colina, Luis
Miralles-Caballero, Daniel
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Galaxy: evolution
Galaxy: kinematics and dynamics
Física
topic Galaxy: evolution
Galaxy: kinematics and dynamics
Física
description Astronomy and Astrophysics 577 (2013): A59 reproduced with permission from Astronomy and Astrophysics
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-09-09
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/662511
https://dx.doi.org/10.1051/0004-6361/201221019
url http://hdl.handle.net/10486/662511
https://dx.doi.org/10.1051/0004-6361/201221019
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ESO
publisher.none.fl_str_mv ESO
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869413611801149440
spelling VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties*Bellocchi, EnricaArribas, SantiagoColina, LuisMiralles-Caballero, DanielGalaxy: evolutionGalaxy: kinematics and dynamicsFísicaAstronomy and Astrophysics 577 (2013): A59 reproduced with permission from Astronomy and AstrophysicsContext.(Ultra) Luminous infrared galaxies [(U)LIRGs] host the most extreme star-forming events in the present universe and are places where a significant fraction of the past star formation beyond z ~ 1 has occurred. The kinematic characterization of this population is important to constrain the processes that govern such events. Aims. We present and discuss the 2D kinematic properties of the ionized gas (Hα) in sample local (U)LIRGs, for which relatively high linear resolution and signal-to-noise (S/N) ratio can be obtained. Methods. We have obtained Very Large Telescope VIMOS optical integral field spectroscopy (IFS) for 38 local (z < 0.1) (U)LIRGs (31 LIRGs and 7 ULIRGs, 51 individual galaxies). This sample covers well the less studied LIRG luminosity range, and it includes the morphological types corresponding to the different phases along the merging process (i.e., isolated disks, interacting and merging systems). Results. The vast majority of objects have two main kinematically distinct components. One component (i.e., narrow or systemic) extends over the whole line-emitting region and is characterized by small-to-intermediate velocity dispersions (i.e., σ from 30 to 160 km s-1). The second component (broad) has a larger velocity dispersion (up to 320 km s -1); it is mainly found in the inner regions and is generally blueshifted with respect to the systemic component. The largest extensions and extreme kinematic properties are observed in interacting and merging systems, and they are likely associated with nuclear outflows. The systemic component traces the overall velocity field, showing a large variety of kinematic 2D structures, from very regular velocity patterns typical of pure rotating disks (29%) to kinematically perturbed disks (47%) and highly disrupted and complex velocity fields (24%). Thus, most of the objects (76%) are dominated by rotation. We find that rotation is more relevant in LIRGs than in ULIRGs. There is a clear correlation between the different phases of the merging process and the mean kinematic properties inferred from the velocity maps. In particular, isolated disks, interacting galaxies, and merging systems define a sequence of increasing mean velocity dispersion and decreasing velocity field amplitude, characterized by average dynamical ratios (v*shear/ σmean) of 4.7, 3.0 and 1.8, respectively. We also find that the σcentral/σ mean vs. σmean plane is an excellent discriminating plane between disks and interacting/merging systems: disks show a mean ratio a factor of 2 larger than those characterizing the other two classes. The LIRGs classified as isolated disks have similar velocity amplitudes but larger mean velocity dispersions (44 vs. 24 km s-1) than local spirals, implying a larger turbulence and thicker disks. Interacting systems and mergers have values closer to those of low velocity dispersion elliptical/lenticular galaxies (E/SOs). The subclass of (U)LIRGs classified as mergers have kinematical properties similar to those shown by the Lyman break analogs (LBAs), although the dynamical mass of LBAs is five times lower on average. Therefore, despite the difference in mass and dust content, the kinematics of these two local populations appears to have significantly noncircular motions. These motions may be induced by the tidal forces, producing dynamically hot systems. The dynamical masses range from ~0.04 m to 1.4 m (i.e., m = 1.4 × 10 11 M), with ULIRGs being more massive (i.e., ~0.5 ± 0.2 m) than LIRGs by, on average, a factor of about 2. The mass ratio of individual pre-coalescence galaxies is <2.5 for most of the systems, confirming that most (U)LIRG mergers involve sub-m galaxies of similar massThis work was funded in part by the Marie Curie Initial Training Network ELIXIR of the European Commission under contract PITNGA- 2008-214227. This work has been supported by the Spanish Ministry of Science and Innovation (MICINN) under grant ESP2007-65475-C02-01ESODepartamento de Física TeóricaFacultad de Ciencias20132013-09-09research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/662511https://dx.doi.org/10.1051/0004-6361/201221019reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6625112026-06-23T12:46:27Z
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