Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S

We present a new technique for modelling submillimetre galaxies (SMGs): the 'Count Matching' approach. Using light cones drawn from a semi-analytic model of galaxy formation, we choose physical galaxy properties given by the model as proxies for their submillimetre luminosities, assuming a...

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Detalles Bibliográficos
Autores principales: Muñoz Arancibia, Alejandra M., Navarrete, Felipe P., Padilla, Nelson D., Cora, Sofía Alejandra, Gawiser, Eric, Kurczynski, Peter, Ruiz, Andrés N.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Early Universe
Galaxies: evolution
Galaxies: formation
Submillimetre: galaxies
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85934
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85934
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Early Universe
Galaxies: evolution
Galaxies: formation
Submillimetre: galaxies
spellingShingle Ciencias Astronómicas
Early Universe
Galaxies: evolution
Galaxies: formation
Submillimetre: galaxies
Muñoz Arancibia, Alejandra M.
Navarrete, Felipe P.
Padilla, Nelson D.
Cora, Sofía Alejandra
Gawiser, Eric
Kurczynski, Peter
Ruiz, Andrés N.
Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S
topic_facet Ciencias Astronómicas
Early Universe
Galaxies: evolution
Galaxies: formation
Submillimetre: galaxies
description We present a new technique for modelling submillimetre galaxies (SMGs): the 'Count Matching' approach. Using light cones drawn from a semi-analytic model of galaxy formation, we choose physical galaxy properties given by the model as proxies for their submillimetre luminosities, assuming a monotonic relationship. As recent interferometric observations of the Extended Chandra Deep Field-South show that the brightest sources detected by single-dish telescopes are comprised by emission from multiple fainter sources, we assign the submillimetre fluxes so that the combined Large APEX BOlometer CAmera (LABOCA) plus bright-end Atacama Large Millimeter/submillimeter Array observed number counts for this field are reproduced. After turning the model catalogues given by the proxies into submillimetre maps, we perform a source extraction to include the effects of the observational process on the recovered counts and galaxy properties. We find that for all proxies, there are lines of sight giving counts consistent with those derived from LABOCA observations, even for input sources with randomized positions in the simulated map. Comparing the recovered redshift, stellar mass and host halo mass distributions for model SMGs with observational data, we find that the best among the proposed proxies is that in which the submillimetre luminosity increases monotonically with the product between dust mass and star formation rate (SFR). This proxy naturally reproduces a positive trend between SFR and bolometric IR luminosity. The majority of components of blended sources are spatially unassociated.
format Articulo
Articulo
author Muñoz Arancibia, Alejandra M.
Navarrete, Felipe P.
Padilla, Nelson D.
Cora, Sofía Alejandra
Gawiser, Eric
Kurczynski, Peter
Ruiz, Andrés N.
author_facet Muñoz Arancibia, Alejandra M.
Navarrete, Felipe P.
Padilla, Nelson D.
Cora, Sofía Alejandra
Gawiser, Eric
Kurczynski, Peter
Ruiz, Andrés N.
author_sort Muñoz Arancibia, Alejandra M.
title Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S
title_short Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S
title_full Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S
title_fullStr Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S
title_full_unstemmed Properties of submillimetre galaxies in a semi-analytic model using the ‘Count Matching’ approach: application to the ECDF-S
title_sort properties of submillimetre galaxies in a semi-analytic model using the ‘count matching’ approach: application to the ecdf-s
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/85934
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