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Titolo:
Dredge-up effects in galactic and magellanic planetary nebulae

Autore:

Indirizzi:: Inst Astron & Geofis, BR-04301904 Sao Paulo, Brazil Inst Astron & Geofis Sao Paulo Brazil BR-04301904 BC04 Sao Paulo, Brazil Observ Cote Azur, F-06304 Nice 4, France Observ Cote Azur Nice France 4Observ Cote Azur, F-06304 Nice 4, France
Titolo Testata:: ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
fascicolo: 3, volume: 145, anno: 2000,
pagine: 467 - 472
SICI:: 0365-0138(200009)145:3<467:DEIGAM>2.0.ZU;2-8
Fonte:: ISI
Lingua:: ENG
Soggetto:: CHEMICAL EVOLUTION; STAR-FORMATION; ABUNDANCES; CLOUD; REGIONS; OXYGEN; DISK; CARBON; SUPERGIANTS; NITROGEN;
Keywords:: galaxies : Magellanic Clouds; abundances; Planetary Nebulae;
Tipo documento:: Article
Natura:: Periodico
Settore Disciplinare:: Physical, Chemical & Earth Sciences
Citazioni:: 36
Recensione:
Indirizzi per estratti:: Indirizzo: Costa, RDD Inst Astron & Geofis, Av Miguel Stefano 4200, BR-04301904 Sao Paulo, Brazil Inst Astron & Geofis Av Miguel Stefano 4200 Sao Paulo Brazil BR-04301904 BC



Citazione:: R.D.D. Costa et al., "Dredge-up effects in galactic and magellanic planetary nebulae", ASTR AST SS, 145(3), 2000, pp. 467-472

Abstract

Chemical abundances are reported for 23 planetary nebulae in the Small Magellanic Cloud. Average abundances agree with values found for HII regions, suggesting that progenitors of most of these objects have been formed in the last 1 - 2 Gyr. The N/O vs. O/H anticorrelation is confirmed for Magellanic and galactic planetaries, and a more robust. result is obtained if objects of similar ages (or masses) are grouped together. For a given class, such a negative correlation suggests that the surface enrichment due to dredge-up episodes is more efficient at lower metallicities, in agreement with recent computations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/05/13 alle ore 02:50:50