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Theoretical modeling of star-forming galaxies. I. Emission-line diagnostic grids for local and low-metallicity galaxies

Levesque, E M; Kewley, Lisa; Larson, Kirsten

Description

We use the newest generation of the Starburst99/Mappings code to generate an extensive suite of models to facilitate detailed studies of star-forming galaxies and their interstellar medium properties, particularly at low metallicities. The new models used include a rigorous treatment of metal opacities in the population synthesis modeling and more detailed dust physics in the photoionization code. These models span a wide range of physical parameters including metallicity, ionization parameter,...[Show more]

dc.contributor.authorLevesque, E M
dc.contributor.authorKewley, Lisa
dc.contributor.authorLarson, Kirsten
dc.date.accessioned2015-12-13T22:43:10Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/79079
dc.description.abstractWe use the newest generation of the Starburst99/Mappings code to generate an extensive suite of models to facilitate detailed studies of star-forming galaxies and their interstellar medium properties, particularly at low metallicities. The new models used include a rigorous treatment of metal opacities in the population synthesis modeling and more detailed dust physics in the photoionization code. These models span a wide range of physical parameters including metallicity, ionization parameter, and the adoption of both an instantaneous burst and continuous star formation history (SFH). We examine the agreement between our models and local (z < 0.1) star-forming galaxy populations from several large data sets, including the Sloan Digital Sky Survey, the Nearby Field Galaxy Survey, and samples of blue compact galaxies and metal-poor galaxies. We find that models adopting a continuous SFH reproduce the metallicity-sensitive line ratios observed in the local population of star-forming galaxies, including the low-metallicity sample. However, we find that the current codes generate an insufficiently hard ionizing radiation field, leading to deficiencies in the [S II] fluxes produced by the models. We consider the advantages and shortcomings of this suite of models, and discuss future work and improvements that can be applied to the modeling of star-forming galaxies.
dc.publisherUniversity of Chicago Press
dc.sourceAstronomical Journal
dc.subjectKeywords: Galaxies: ISM; Galaxies: starburst
dc.titleTheoretical modeling of star-forming galaxies. I. Emission-line diagnostic grids for local and low-metallicity galaxies
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume139
dc.date.issued2010
local.identifier.absfor020104 - Galactic Astronomy
local.identifier.ariespublicationf5625xPUB7607
local.type.statusPublished Version
local.contributor.affiliationLevesque, E M, University of Hawaii
local.contributor.affiliationKewley, Lisa, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLarson, Kirsten, University of Hawaii
local.description.embargo2037-12-31
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage712
local.bibliographicCitation.lastpage727
local.identifier.doi10.1088/0004-6256/139/2/712
dc.date.updated2016-02-24T09:36:06Z
local.identifier.scopusID2-s2.0-74849108337
CollectionsANU Research Publications

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