dc.contributor.author Dahlem, M. dc.contributor.author Lisenfeld, Ute dc.contributor.author Rossa, J. dc.date.accessioned 2013-10-10T12:20:48Z dc.date.available 2013-10-10T12:20:48Z dc.date.issued 2006 dc.identifier.citation Dahlem, M.; Lisenfeld, U.; Rossa, J. Dependence of radio halo properties on star formation activity and galaxy mass. Astronomy and Astrophysics, 457(1): 121-131 (2006). [http://hdl.handle.net/10481/28413] es_ES dc.identifier.issn 0004-6361 dc.identifier.issn 1432-0746 dc.identifier.other arXiv:astro-ph/0607102v1 dc.identifier.uri http://hdl.handle.net/10481/28413 dc.description.abstract We investigate the relation between the existence and size of radio halos, which are believed to be created by star formation (SF) related energy input into the interstellar medium, and other galaxy properties, most importantly star formation activity and galaxy mass. Based on radio continuum and H$\alpha$ observations of a sample of seven late-type spiral galaxies we find a direct, linear correlation of the radial extent of gaseous halos on the size of the actively star-forming parts of the galaxy disks. Data of a larger sample of 22 galaxies indicate that the threshold energy input rate into the disk ISM per unit surface area for the creation of a gaseous halo depends on the mass surface density of the galaxy, in the sense that a higher threshold must be surpassed for galaxies with a higher surface density. Because of the good prediction of the existence of a radio halo from these two parameters, we conclude that they are important, albeit not the only contributors. The compactness of the SF-related energy input is also found to be a relevant factor. Galaxies with relatively compact SF distributions are more likely to have gaseous halos than others with more widespread SF activity. These results quantify the so-called "break-out" condition for matter to escape from galaxy disks, as used in all current models of the interstellar medium and first defined by Norman & Ikeuchi (1989). es_ES dc.description.sponsorship U.L. acknowledges support by the Spanish Ministry of Education, via the research projects AYA 2005-0716-C02-01, ESP 2004-06870-C02-02, and the Junta de Andalucía. es_ES dc.language.iso eng es_ES dc.publisher European Southern Observatory (ESO); Springer Verlag es_ES dc.rights Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License es_ES dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ es_ES dc.subject ISM es_ES dc.subject Galaxies es_ES dc.subject Spiral es_ES dc.subject Evolution es_ES dc.subject Halos es_ES dc.subject Starburst es_ES dc.subject Radio continuum es_ES dc.title Dependence of radio halo properties on star formation activity and galaxy mass es_ES dc.type info:eu-repo/semantics/preprint es_ES dc.rights.accessRights info:eu-repo/semantics/openAccess es_ES dc.identifier.doi 10.1051/0004-6361:20054787 es_ES
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