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Article: Physical and Chemical Properties of Planetary Nebulae with WR-type Nuclei

Title Physical and Chemical Properties of Planetary Nebulae with WR-type Nuclei Danehkar, AWesson, RKarakas, AParker, QA Astrophysics - Solar and Stellar AstrophysicsAstrophysics - Astrophysics of Galaxies 2014 ArXiv e-prints, 2014, v. 1411, p. 2191-2191 How to Cite? We have carried out optical spectroscopic measurements of emission lines for a sample of Galactic planetary nebulae with Wolf-Rayet (WR) stars and weak emission-line stars (wels). The plasma diagnostics and elemental abundance analysis have been done using both collisionally excited lines (CELs) and optical recombination lines (ORLs). It is found that the abundance discrepancy factors (ADF=ORL/CEL) are closely correlated with the dichotomy between temperatures derived from forbidden lines and those from He I recombination lines, implying the existence of H-deficient materials embedded in the nebula. The H$\beta$ surface brightness correlations suggest that they might be also related to the nebular evolution. http://hdl.handle.net/10722/211191

DC FieldValueLanguage
dc.contributor.authorDanehkar, A-
dc.contributor.authorWesson, R-
dc.contributor.authorKarakas, A-
dc.contributor.authorParker, QA-
dc.date.accessioned2015-07-08T03:22:50Z-
dc.date.available2015-07-08T03:22:50Z-
dc.date.issued2014-
dc.identifier.citationArXiv e-prints, 2014, v. 1411, p. 2191-2191-
dc.identifier.urihttp://hdl.handle.net/10722/211191-
dc.description.abstractWe have carried out optical spectroscopic measurements of emission lines for a sample of Galactic planetary nebulae with Wolf-Rayet (WR) stars and weak emission-line stars (wels). The plasma diagnostics and elemental abundance analysis have been done using both collisionally excited lines (CELs) and optical recombination lines (ORLs). It is found that the abundance discrepancy factors (ADF=ORL/CEL) are closely correlated with the dichotomy between temperatures derived from forbidden lines and those from He I recombination lines, implying the existence of H-deficient materials embedded in the nebula. The H$\beta$ surface brightness correlations suggest that they might be also related to the nebular evolution.-
dc.languageeng-
dc.relation.ispartofArXiv e-prints-
dc.subjectAstrophysics - Solar and Stellar Astrophysics-
dc.subjectAstrophysics - Astrophysics of Galaxies-
dc.titlePhysical and Chemical Properties of Planetary Nebulae with WR-type Nuclei-
dc.typeArticle-
dc.identifier.emailParker, QA: quentinp@hku.hk-
dc.identifier.authorityParker, QA=rp02017-
dc.description.naturepostprint-
dc.identifier.volume1411-
dc.identifier.spage2191-
dc.identifier.epage2191-