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dc.contributor.authorCioni, M-R.L.
dc.contributor.authorCortiglioni, S.
dc.contributor.authorOrsini, M.
dc.contributor.authorPalazzi, E.
dc.contributor.authorPalumbo, G.G.C.
dc.contributor.authorSorochenko, R.L.
dc.contributor.authorTsivilev, A.P.
dc.date.accessioned2009-11-30T14:20:06Z
dc.date.available2009-11-30T14:20:06Z
dc.date.issued1998
dc.identifier.citationCioni , M-RL , Cortiglioni , S , Orsini , M , Palazzi , E , Palumbo , G G C , Sorochenko , R L & Tsivilev , A P 1998 , ' New measurements of the 4He abundance in galactic HII ' , Lecture Notes in Physics , vol. 506 , pp. 429-432 . https://doi.org/10.1007/BFb0104760
dc.identifier.issn0075-8450
dc.identifier.otherPURE: 155838
dc.identifier.otherPURE UUID: edc74e4f-90dd-4449-911d-c5f37c9870d5
dc.identifier.otherdspace: 2299/4031
dc.identifier.urihttp://hdl.handle.net/2299/4031
dc.description“The original publication is available at www.springerlink.com”. Copyright Springer. DOI: 10.1007/BFb0104760 [Full text of this article is not available in the UHRA]
dc.description.abstractPreliminary results of the 4He relative abundance determination from Radio Recombination Lines observations at different frequencies in the Orion, Rosette and W3 HII regions are presented. The Orion HII region has been mapped at both 22 GHz and 36 GHz with the same beamwidth (2 arcmin) using the Medicina and Puschino radio telescopes respectively. The RRLs parameters, together with their variation with frequency and with distance were determined by centering the map on the star ϑ 1 OriC. Three positions were observed in the Rosette HII region at 8.3 GHz leading to the first detection in this region of the transition He92α. The derived 4He relative abundance is considerably greater than the ones obtained from previous measurements. The W3 HII region was observed at 36 GHz and the 4He/H value derived was compared with previous measurements performed with higher spatial resolution.en
dc.language.isoeng
dc.relation.ispartofLecture Notes in Physics
dc.titleNew measurements of the 4He abundance in galactic HIIen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted1998
rioxxterms.versionofrecordhttps://doi.org/10.1007/BFb0104760
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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