Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries

We present spatially resolved kinematics and global stellar populations and mass-to-light ratios for a sample of 39 dwarf early-type (dE) galaxies in the Virgo cluster studied as part of the SMAKCED stellar absorption-line spectroscopy and imaging survey. This sample is representative of the early-t...

ver descrição completa

Detalhes bibliográficos
Autores: Toloba, E., Guhathakurta, P., Peletier, R. F., Boselli, A., Lisker, T., Falcón Barroso, J., Simón, J. D., van de Ven, G., Paudel, S., Emsellem, E., Janz, J., den Brok, M., Gorgas García, Francisco Javier, Hensler, G., Laurikainen, E., Niemi, S. M., Rys, A., Salo, H.
Formato: artículo
Fecha de publicación:2014
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/33804
Acesso em linha:https://hdl.handle.net/20.500.14352/33804
Access Level:acceso abierto
Palavra-chave:52
Digital sky survey
To-light ratio
Dispersion-supported galaxies
Newton-telescope library
Elliptic galaxies
Internal dynamics
Rotation curves
Star-formation
Dark-matter
Local group
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
id ES_f6f85202b0dc94bf5d2df41d83efed51
oai_identifier_str oai:docta.ucm.es:20.500.14352/33804
network_acronym_str ES
network_name_str España
repository_id_str
spelling Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetriesToloba, E.Guhathakurta, P.Peletier, R. F.Boselli, A.Lisker, T.Falcón Barroso, J.Simón, J. D.van de Ven, G.Paudel, S.Emsellem, E.Janz, J.den Brok, M.Gorgas García, Francisco JavierHensler, G.Laurikainen, E.Niemi, S. M.Rys, A.Salo, H.52Digital sky surveyTo-light ratioDispersion-supported galaxiesNewton-telescope libraryElliptic galaxiesInternal dynamicsRotation curvesStar-formationDark-matterLocal groupAstrofísicaAstronomía (Física)Física atmosférica2501 Ciencias de la AtmósferaWe present spatially resolved kinematics and global stellar populations and mass-to-light ratios for a sample of 39 dwarf early-type (dE) galaxies in the Virgo cluster studied as part of the SMAKCED stellar absorption-line spectroscopy and imaging survey. This sample is representative of the early-type population in the Virgo cluster in the absolute magnitude range -19.0 < M-r < -16.0 and of all morphological subclasses found in this galaxy population. For each dE, we measure the rotation curve and velocity dispersion profile and fit an analytic function to the rotation curve. We study the significance of the departure of the rotation curve from the best-fit analytic function (poorly fit) and of the difference between the approaching and receding sides of the rotation curve (asymmetry). Our sample includes two dEs with kinematically decoupled cores that have been previously reported. We find that 62 +/- 8% (23 out of the 39) of the dEs have a significant anomaly in their rotation curve. Analysis of the images reveals photometric anomalies for most galaxies. However, there is no clear correlation between the significance of the photometric and kinematic anomalies. We measure age-sensitive (H-beta and H-gamma A) and metallicity sensitive (Fe4668 and Mgb) Lick spectral indices in the LIS-5 angstrom system. This population of galaxies exhibits a wide range of ages and metallicities; we also find that 4 dEs show clear evidence of emission partially filling in the Balmer absorption lines. Finally, we estimate the total masses and dark matter fractions of the dEs and plot them in the mass-size, themass-velocity dispersion, and the fundamental plane scaling relations. The dEs seem to be the bridge between massive early-type galaxies and dSphs, and have a median total mass within the R-e of logM(e) = 9.1 +/- 0.2 and a median dark matter fraction within the R-e of f(DM) = 46 +/- 18%. Any formation model for the dE galaxy class must account for this diversity of kinematic and photometric anomalies and stellar populations.University Chicago PressUniversidad Complutense de Madrid20142014-12-0120142014-12-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/33804reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/338042026-06-02T12:44:21Z
dc.title.none.fl_str_mv Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
title Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
spellingShingle Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
Toloba, E.
52
Digital sky survey
To-light ratio
Dispersion-supported galaxies
Newton-telescope library
Elliptic galaxies
Internal dynamics
Rotation curves
Star-formation
Dark-matter
Local group
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
title_short Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
title_full Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
title_fullStr Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
title_full_unstemmed Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
title_sort Stellar kinematics and structural properties of virgo cluster dwarf early-type galaxies from the smakced project. II. The survey and a systematic analysis of kinematic anomalies and asymmetries
dc.creator.none.fl_str_mv Toloba, E.
Guhathakurta, P.
Peletier, R. F.
Boselli, A.
Lisker, T.
Falcón Barroso, J.
Simón, J. D.
van de Ven, G.
Paudel, S.
Emsellem, E.
Janz, J.
den Brok, M.
Gorgas García, Francisco Javier
Hensler, G.
Laurikainen, E.
Niemi, S. M.
Rys, A.
Salo, H.
author Toloba, E.
author_facet Toloba, E.
Guhathakurta, P.
Peletier, R. F.
Boselli, A.
Lisker, T.
Falcón Barroso, J.
Simón, J. D.
van de Ven, G.
Paudel, S.
Emsellem, E.
Janz, J.
den Brok, M.
Gorgas García, Francisco Javier
Hensler, G.
Laurikainen, E.
Niemi, S. M.
Rys, A.
Salo, H.
author_role author
author2 Guhathakurta, P.
Peletier, R. F.
Boselli, A.
Lisker, T.
Falcón Barroso, J.
Simón, J. D.
van de Ven, G.
Paudel, S.
Emsellem, E.
Janz, J.
den Brok, M.
Gorgas García, Francisco Javier
Hensler, G.
Laurikainen, E.
Niemi, S. M.
Rys, A.
Salo, H.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Digital sky survey
To-light ratio
Dispersion-supported galaxies
Newton-telescope library
Elliptic galaxies
Internal dynamics
Rotation curves
Star-formation
Dark-matter
Local group
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
topic 52
Digital sky survey
To-light ratio
Dispersion-supported galaxies
Newton-telescope library
Elliptic galaxies
Internal dynamics
Rotation curves
Star-formation
Dark-matter
Local group
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
description We present spatially resolved kinematics and global stellar populations and mass-to-light ratios for a sample of 39 dwarf early-type (dE) galaxies in the Virgo cluster studied as part of the SMAKCED stellar absorption-line spectroscopy and imaging survey. This sample is representative of the early-type population in the Virgo cluster in the absolute magnitude range -19.0 < M-r < -16.0 and of all morphological subclasses found in this galaxy population. For each dE, we measure the rotation curve and velocity dispersion profile and fit an analytic function to the rotation curve. We study the significance of the departure of the rotation curve from the best-fit analytic function (poorly fit) and of the difference between the approaching and receding sides of the rotation curve (asymmetry). Our sample includes two dEs with kinematically decoupled cores that have been previously reported. We find that 62 +/- 8% (23 out of the 39) of the dEs have a significant anomaly in their rotation curve. Analysis of the images reveals photometric anomalies for most galaxies. However, there is no clear correlation between the significance of the photometric and kinematic anomalies. We measure age-sensitive (H-beta and H-gamma A) and metallicity sensitive (Fe4668 and Mgb) Lick spectral indices in the LIS-5 angstrom system. This population of galaxies exhibits a wide range of ages and metallicities; we also find that 4 dEs show clear evidence of emission partially filling in the Balmer absorption lines. Finally, we estimate the total masses and dark matter fractions of the dEs and plot them in the mass-size, themass-velocity dispersion, and the fundamental plane scaling relations. The dEs seem to be the bridge between massive early-type galaxies and dSphs, and have a median total mass within the R-e of logM(e) = 9.1 +/- 0.2 and a median dark matter fraction within the R-e of f(DM) = 46 +/- 18%. Any formation model for the dE galaxy class must account for this diversity of kinematic and photometric anomalies and stellar populations.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-12-01
2014
2014-12-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/33804
url https://hdl.handle.net/20.500.14352/33804
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 University Chicago Press
publisher.none.fl_str_mv University Chicago Press
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869424812794839040
score 15,300719

Registos relacionados