The nebular emission of star-forming galaxies in a hierarchical universe
Galaxy surveys targeting emission lines are characterizing the evolution of star-forming galaxies, but there is still little theoretical progress in modelling their physical properties. We predict nebular emission from star-forming galaxies within a cosmological galaxy formation model. Emission line...
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| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2014
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/93736 http://mnras.oxfordjournals.org/content/443/1/799.full.pdf+html |
| Aporte de: |
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I19-R120-10915-93736 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Numerical methods Evolution of galaxies High redshift Surveys |
| spellingShingle |
Ciencias Astronómicas Numerical methods Evolution of galaxies High redshift Surveys Orsi, Alvaro Padilla, Nelson David Groves, Brent Cora, Sofía Alejandra Tecce, Tomas Enrique Gargiulo, Ignacio Daniel Ruiz, Andrés Nicolás The nebular emission of star-forming galaxies in a hierarchical universe |
| topic_facet |
Ciencias Astronómicas Numerical methods Evolution of galaxies High redshift Surveys |
| description |
Galaxy surveys targeting emission lines are characterizing the evolution of star-forming galaxies, but there is still little theoretical progress in modelling their physical properties. We predict nebular emission from star-forming galaxies within a cosmological galaxy formation model. Emission lines are computed by combining the semi-analytical model SAG with the photoionization code MAPPINGS-III. We characterize the interstellar medium of galaxies by relating the ionization parameter of gas in galaxies to their cold gas metallicity, obtaining a reasonable agreement with the observed Hα, [O II] λ 3727, [O III] λ 5007 luminosity functions, and the BPT diagram for local star-forming galaxies. The average ionization parameter is found to increase towards low star formation rates and high redshifts, consistent with recent observational results. The predicted link between different emission lines and their associated star formation rates is studied by presenting scaling relations to relate them. Our model predicts that emission-line galaxies have modest clustering bias, and thus reside in dark matter haloes of masses below Mhalo ≲ 1012 [h−1 M⊙]. Finally, we exploit our modelling technique to predict galaxy number counts up to z ∼ 10 by targeting far-infrared emission lines detectable with submillimetre facilities. |
| format |
Articulo Articulo |
| author |
Orsi, Alvaro Padilla, Nelson David Groves, Brent Cora, Sofía Alejandra Tecce, Tomas Enrique Gargiulo, Ignacio Daniel Ruiz, Andrés Nicolás |
| author_facet |
Orsi, Alvaro Padilla, Nelson David Groves, Brent Cora, Sofía Alejandra Tecce, Tomas Enrique Gargiulo, Ignacio Daniel Ruiz, Andrés Nicolás |
| author_sort |
Orsi, Alvaro |
| title |
The nebular emission of star-forming galaxies in a hierarchical universe |
| title_short |
The nebular emission of star-forming galaxies in a hierarchical universe |
| title_full |
The nebular emission of star-forming galaxies in a hierarchical universe |
| title_fullStr |
The nebular emission of star-forming galaxies in a hierarchical universe |
| title_full_unstemmed |
The nebular emission of star-forming galaxies in a hierarchical universe |
| title_sort |
nebular emission of star-forming galaxies in a hierarchical universe |
| publishDate |
2014 |
| url |
http://sedici.unlp.edu.ar/handle/10915/93736 http://mnras.oxfordjournals.org/content/443/1/799.full.pdf+html |
| work_keys_str_mv |
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Repositorios |
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