Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing
In this work we analyze the physical properties of a sample of 153 star-forming galaxies at z ~ 0.84, selected by their Hα flux with a narrowband filter. B-band luminosities of the objects are higher than those of local star-forming galaxies. Most of the galaxies are located in the blue cloud, thoug...
| Autores: | , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2011 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/44774 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/44774 |
| Access Level: | Acceso aberto |
| Palavra-chave: | 52 Ultraviolet luminosity density Emission-line galaxies Extended groth strip Color-magnitude diagram France redshift survey Aegis field galaxies Lyman-break galaxies Power-law galaxies Hubble-deep-field To-fir analysis Astrofísica Astronomía (Física) |
| id |
ES_c68bdc238449eb3ce8d661bbb9d4dde8 |
|---|---|
| oai_identifier_str |
oai:docta.ucm.es:20.500.14352/44774 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizingVillar, VictorGallego Maestro, JesúsPérez González, Pablo GuillermoBarro, GuillermoZamorano Calvo, JaimeNoeske, KaiKoo, David C.52Ultraviolet luminosity densityEmission-line galaxiesExtended groth stripColor-magnitude diagramFrance redshift surveyAegis field galaxiesLyman-break galaxiesPower-law galaxiesHubble-deep-fieldTo-fir analysisAstrofísicaAstronomía (Física)In this work we analyze the physical properties of a sample of 153 star-forming galaxies at z ~ 0.84, selected by their Hα flux with a narrowband filter. B-band luminosities of the objects are higher than those of local star-forming galaxies. Most of the galaxies are located in the blue cloud, though some objects are detected in the green valley and in the red sequence. After the extinction correction is applied, virtually all these red galaxies move to the blue sequence, unveiling their dusty nature. A check on the extinction law reveals that the typical extinction law for local starbursts is well suited for our sample but with E(B - V)_stars = 0.55 E(B - V)_gas. We compare star formation rates (SFRs) measured with different tracers (Hα, far-ultraviolet, and infrared), finding that they agree within a factor of three after extinction correction. We find a correlation between the ratios SFR_FUV/SFR_Hα, SFR_IR/SFR_Hα, and the EW(Hα) (i.e., weighted age), which accounts for part of the scatter. We obtain stellar mass estimations by fitting templates to multi-wavelength photometry. The typical stellar mass of a galaxy within our sample is ∼10^10 M_⨀. The SFR is correlated with stellar mass and the specific SFR decreases with it, indicating that massive galaxies are less affected by star formation processes than less massive ones. This result is consistent with the downsizing scenario. To quantify this downsizing we estimated the quenching mass M-Q for our sample at z ~ 0.84, finding that it declines from M_Q ~ 10^12 M_⨀t at z ~ 0.84 to M_Q ~ 8 x 10^10 M_⨀ at the local universe.American Astronomical SocietyUniversidad Complutense de Madrid20112011-10-1020112011-10-10journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/44774reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/447742026-06-02T12:44:21Z |
| dc.title.none.fl_str_mv |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| title |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| spellingShingle |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing Villar, Victor 52 Ultraviolet luminosity density Emission-line galaxies Extended groth strip Color-magnitude diagram France redshift survey Aegis field galaxies Lyman-break galaxies Power-law galaxies Hubble-deep-field To-fir analysis Astrofísica Astronomía (Física) |
| title_short |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| title_full |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| title_fullStr |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| title_full_unstemmed |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| title_sort |
Star formation rates and stellar masses of Hα selected star-forming galaxies at z=0.84: a quantification of the downsizing |
| dc.creator.none.fl_str_mv |
Villar, Victor Gallego Maestro, Jesús Pérez González, Pablo Guillermo Barro, Guillermo Zamorano Calvo, Jaime Noeske, Kai Koo, David C. |
| author |
Villar, Victor |
| author_facet |
Villar, Victor Gallego Maestro, Jesús Pérez González, Pablo Guillermo Barro, Guillermo Zamorano Calvo, Jaime Noeske, Kai Koo, David C. |
| author_role |
author |
| author2 |
Gallego Maestro, Jesús Pérez González, Pablo Guillermo Barro, Guillermo Zamorano Calvo, Jaime Noeske, Kai Koo, David C. |
| author2_role |
author author author author author author |
| dc.contributor.none.fl_str_mv |
Universidad Complutense de Madrid |
| dc.subject.none.fl_str_mv |
52 Ultraviolet luminosity density Emission-line galaxies Extended groth strip Color-magnitude diagram France redshift survey Aegis field galaxies Lyman-break galaxies Power-law galaxies Hubble-deep-field To-fir analysis Astrofísica Astronomía (Física) |
| topic |
52 Ultraviolet luminosity density Emission-line galaxies Extended groth strip Color-magnitude diagram France redshift survey Aegis field galaxies Lyman-break galaxies Power-law galaxies Hubble-deep-field To-fir analysis Astrofísica Astronomía (Física) |
| description |
In this work we analyze the physical properties of a sample of 153 star-forming galaxies at z ~ 0.84, selected by their Hα flux with a narrowband filter. B-band luminosities of the objects are higher than those of local star-forming galaxies. Most of the galaxies are located in the blue cloud, though some objects are detected in the green valley and in the red sequence. After the extinction correction is applied, virtually all these red galaxies move to the blue sequence, unveiling their dusty nature. A check on the extinction law reveals that the typical extinction law for local starbursts is well suited for our sample but with E(B - V)_stars = 0.55 E(B - V)_gas. We compare star formation rates (SFRs) measured with different tracers (Hα, far-ultraviolet, and infrared), finding that they agree within a factor of three after extinction correction. We find a correlation between the ratios SFR_FUV/SFR_Hα, SFR_IR/SFR_Hα, and the EW(Hα) (i.e., weighted age), which accounts for part of the scatter. We obtain stellar mass estimations by fitting templates to multi-wavelength photometry. The typical stellar mass of a galaxy within our sample is ∼10^10 M_⨀. The SFR is correlated with stellar mass and the specific SFR decreases with it, indicating that massive galaxies are less affected by star formation processes than less massive ones. This result is consistent with the downsizing scenario. To quantify this downsizing we estimated the quenching mass M-Q for our sample at z ~ 0.84, finding that it declines from M_Q ~ 10^12 M_⨀t at z ~ 0.84 to M_Q ~ 8 x 10^10 M_⨀ at the local universe. |
| publishDate |
2011 |
| dc.date.none.fl_str_mv |
2011 2011-10-10 2011 2011-10-10 |
| 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/20.500.14352/44774 |
| url |
https://hdl.handle.net/20.500.14352/44774 |
| 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 |
American Astronomical Society |
| publisher.none.fl_str_mv |
American Astronomical Society |
| 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_ |
1869419082248355840 |
| score |
15.300719 |