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An ultraviolet-to-radio broadband spectral atlas of nearby galaxies

dc.contributor.authorGil De Paz, Armando
dc.date.accessioned2023-06-20T11:09:10Z
dc.date.available2023-06-20T11:09:10Z
dc.date.issued2007-02-01
dc.description© 2007. The American Astronomical Society. All rights reserved. Artículo firmado por 32 autores. Support for this work, part of the Spitzer Space Telescope Legacy Science Program, was provided by NASA through contract 1224769 issued by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407. A. G. d. P. is financed by the MAGPOP EU Marie Curie Research Training Network and the Spanish Programa Nacional de Astronomía y Astrofísica under grant AYA2003-01676. We are thankful for the hard work put in by the instrument teams and the Spitzer Science Center. We gratefully acknowledge NASA’s support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology. This research has made use of the NASA/IPAC Extragalactic Database, which is operated by JPL/Caltech, under contract with NASA. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and IPAC/Caltech, funded by NASA and the National Science Foundation.
dc.description.abstractThe ultraviolet-to-radio continuum spectral energy distributions are presented for all 75 galaxies in the Spitzer Infrared Nearby Galaxies Survey (SINGS). A principal component analysis of the sample shows that most of the sample's spectral variations stem from two underlying components, one representative of a galaxy with a low infrared-to-ultraviolet ratio and one representative of a galaxy with a high infrared-to-ultraviolet ratio. The influence of several parameters on the infrared-to-ultraviolet ratio is studied (e. g., optical morphology, disk inclination, far-infrared color, ultraviolet spectral slope, and star formation history). Consistent with our understanding of normal star-forming galaxies, the SINGS sample of galaxies in comparison to more actively star-forming galaxies exhibits a larger dispersion in the infrared-to-ultraviolet versus ultraviolet spectral slope correlation. Early-type galaxies, exhibiting low star formation rates and high optical surface brightnesses, have the most discrepant infrared-to-ultraviolet correlation. These results suggest that the star formation history may be the dominant regulator of the broadband spectral variations between galaxies. Finally, a new discovery shows that the 24 μm morphology can be a useful tool for parameterizing the global dust temperature and ultraviolet extinction in nearby galaxies. The dust emission in dwarf/irregular galaxies is clumpy and warm accompanied by low ultraviolet extinction, while in spiral galaxies there is typically a much larger diffuse component of cooler dust and average ultraviolet extinction. For galaxies with nuclear 24 μm emission, the dust temperature and ultraviolet extinction are relatively high compared to disk galaxies.
dc.description.departmentDepto. de Física de la Tierra y Astrofísica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipNational Aeronautics and Space Administration (NASA)
dc.description.sponsorshipMarie Curie Research Training Network =Acciones Marie Curie, UE
dc.description.sponsorshipPrograma Nacional de Astronomía y Astrofísica (NAyA), España
dc.description.sponsorshipNational Science Foundation (NSF)
dc.description.sponsorshipUnión Europea. FP6
dc.description.sponsorshipJet Propulsion Laboratory, California Institute of Technology (CalTECH)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35862
dc.identifier.doi10.1086/510362
dc.identifier.issn0004-637X
dc.identifier.officialurlhttp://dx.doi.org/10.1086/510362
dc.identifier.relatedurlhttp://iopscience.iop.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/51768
dc.issue.number2
dc.journal.titleAstrophysical journal
dc.language.isoeng
dc.page.final884
dc.page.initial863
dc.publisherAmerican Astronomical Society
dc.relation.projectID1224769
dc.relation.projectID1407
dc.relation.projectIDAYA2003-01676
dc.relation.projectIDMAGPOP (Multi-wavelength analysis of galaxy populations)
dc.rights.accessRightsopen access
dc.subject.cdu52
dc.subject.keywordStar-forming galaxies
dc.subject.keyword1.49 GHZ atlas
dc.subject.keywordStarburst galaxies
dc.subject.keywordEnergy-distributions
dc.subject.keywordInfrared-emission
dc.subject.keywordDust attenuation
dc.subject.keywordSpiral galaxies
dc.subject.keywordFormation rates
dc.subject.keywordDisk galaxies
dc.subject.keywordInternal extinction
dc.subject.ucmAstrofísica
dc.subject.ucmAstronomía (Física)
dc.titleAn ultraviolet-to-radio broadband spectral atlas of nearby galaxies
dc.typejournal article
dc.volume.number655
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