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dc.contributor.authorDeeg, H-J.
dc.contributor.authorDuric, N.
dc.contributor.authorBrinks, E.
dc.date.accessioned2007-10-23T14:21:57Z
dc.date.available2007-10-23T14:21:57Z
dc.date.issued1997
dc.identifier.citationDeeg , H-J , Duric , N & Brinks , E 1997 , ' Star formation histories in H II galaxies. I. Optical and radio observations ' , Astronomy and Astrophysics , vol. 323 , pp. 323-336 .
dc.identifier.issn1432-0746
dc.identifier.otherPURE: 150021
dc.identifier.otherPURE UUID: 2b403169-f48b-4b0e-a1fe-ef283cd1c73e
dc.identifier.otherdspace: 2299/979
dc.identifier.otherScopus: 0041061420
dc.identifier.otherORCID: /0000-0002-7758-9699/work/30407930
dc.identifier.urihttp://hdl.handle.net/2299/979
dc.description.abstractIn this paper we report CCD photometry in broad band B, R, and I colors, as well as in the H , for a sample of eight Hii galaxies with strong radio emission. In addition, we present new radio continuum observations in the frequency range between 8 and 15 GHz. For seven of these galaxies, previous radio continuum observations have been reported by Deeg et al. (1993); data on Haro 1 are presented here for the rst time. Their unusual radio spectra, according to Deeg et al., are a consequence of rapidly changing star formation rates in their past. An independent veri cation of this conclusion is the motivation for the optical observations reported here. Their interpretation is the subject of the next article in this series. The new radio measurements con rm the interpretation of the radio spectra by Deeg et al. In combination with extinction corrected H fluxes, the new radio measurements allow the determination of thermal radio fluxes - a fundamental parameter for star formation rates - with higher reliability than is possible from one wavelength domain alone. Overlays of optical observations at different colors with radio maps, as well as a search of the literature, indicates that all sample galaxies are in interacting environments, which is a possible prerequisite for the strength of the radio emission and star formation observed in these galaxies.en
dc.language.isoeng
dc.relation.ispartofAstronomy and Astrophysics
dc.titleStar formation histories in H II galaxies. I. Optical and radio observationsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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