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Article: Optical spectrum of the planetary nebula M 2-24

TitleOptical spectrum of the planetary nebula M 2-24
Authors
KeywordsIsm: Abundances
Ism: Lines And Bands
Planetary Nebulae: Individual M 2-24
Issue Date2003
PublisherE D P Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 2003, v. 404 n. 2, p. 545-556 How to Cite?
AbstractWe have obtained medium-resolution, deep optical long-slit spectra of the bulge planetary nebula (PN) M 2-24. The spectrum covers the wavelength range from 3610-7330 Å. Over two hundred emission lines have been detected. The spectra show a variety of optical recombination lines (ORLs) from C, N, O and Ne ions. The diagnostic diagram shows significant density and temperature variations across the nebula. Our analysis suggests that the nebula has a dense central emission core. The nebula was thus studied by dividing it into two regions: 1) a high ionization region characterized by an electron temperature of T e = 16 300 K and a density of log N e(cm -3 = 6.3; and 2) a low ionization region represented by T e = 11 400 K and log N e(cm -3) = 3.7. A large number of ORLs from C, N, O and Ne ions have been used to determine the abundances of these elements relative to hydrogen. In general, the resultant abundances are found to be higher than the corresponding values deduced from collisionally excited lines (CELs). This bulge PN is found to have large enhancements in two α-elements, magnesium and neon.
Persistent Identifierhttp://hdl.handle.net/10722/174846
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Yen_US
dc.contributor.authorLiu, XWen_US
dc.date.accessioned2012-11-26T08:47:47Z-
dc.date.available2012-11-26T08:47:47Z-
dc.date.issued2003en_US
dc.identifier.citationAstronomy And Astrophysics, 2003, v. 404 n. 2, p. 545-556en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/10722/174846-
dc.description.abstractWe have obtained medium-resolution, deep optical long-slit spectra of the bulge planetary nebula (PN) M 2-24. The spectrum covers the wavelength range from 3610-7330 Å. Over two hundred emission lines have been detected. The spectra show a variety of optical recombination lines (ORLs) from C, N, O and Ne ions. The diagnostic diagram shows significant density and temperature variations across the nebula. Our analysis suggests that the nebula has a dense central emission core. The nebula was thus studied by dividing it into two regions: 1) a high ionization region characterized by an electron temperature of T e = 16 300 K and a density of log N e(cm -3 = 6.3; and 2) a low ionization region represented by T e = 11 400 K and log N e(cm -3) = 3.7. A large number of ORLs from C, N, O and Ne ions have been used to determine the abundances of these elements relative to hydrogen. In general, the resultant abundances are found to be higher than the corresponding values deduced from collisionally excited lines (CELs). This bulge PN is found to have large enhancements in two α-elements, magnesium and neon.en_US
dc.languageengen_US
dc.publisherE D P Sciences. The Journal's web site is located at http://www.aanda.orgen_US
dc.relation.ispartofAstronomy and Astrophysicsen_US
dc.subjectIsm: Abundancesen_US
dc.subjectIsm: Lines And Bandsen_US
dc.subjectPlanetary Nebulae: Individual M 2-24en_US
dc.titleOptical spectrum of the planetary nebula M 2-24en_US
dc.typeArticleen_US
dc.identifier.emailZhang, Y: zhangy96@hku.hken_US
dc.identifier.authorityZhang, Y=rp00841en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0038609589en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0038609589&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume404en_US
dc.identifier.issue2en_US
dc.identifier.spage545en_US
dc.identifier.epage556en_US
dc.publisher.placeFranceen_US
dc.identifier.scopusauthoridZhang, Y=23768446500en_US
dc.identifier.scopusauthoridLiu, XW=7409287288en_US

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