naa a22 4500 510732569 CHVBK 20180411082958.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1134/S1063772913050041 doi (NATIONALLICENCE)springer-10.1134/S1063772913050041 Chemical composition of planetary nebulae in the Large and Small Magellanic Clouds [Elektronische Daten] [V. Holovatyy, B. Melekh, M. Sokil, N. Havrylova] The technique of nebular-gas diagnostics was used to find electronic temperatures T e , concentrations n e , relative ion concentrations n(A+i )/n(H+), and chemical abundances A/H for planetary nebulae in the Large and Small Magellanic Clouds. This analysis took into account inhomogeneities of the nebular-gas density in the nebulae. We determined the pre-galactic helium abundance Y p and its rate of enrichment dY/dZ for the envelopes of nine nebulae in the Large Magellanic Cloud. Taken together with the Galaxy's planetary nebulae and HII regions in blue compact dwarf galaxies, Y p = 0.248 ± 0.002, dY/dZ = 2.31 ± 0.48 and Y p = 0.247 ± 0.002, dY/dZ = 3.03 ± 0.56, respectively, when macroinhomogeneities and macro/microinhomogeneities of the gas density in galactic nebulae are taken into account. Pleiades Publishing, Ltd., 2013 Holovatyy V. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut Melekh B. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut Sokil M. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut Havrylova N. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut Astronomy Reports SP MAIK Nauka/Interperiodica 57/5(2013-05-01), 366-379 1063-7729 57:5<366 2013 57 11444 https://doi.org/10.1134/S1063772913050041 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772913050041 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Holovatyy V. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut NATIONALLICENCE 700 1- Melekh B. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut NATIONALLICENCE 700 1- Sokil M. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut NATIONALLICENCE 700 1- Havrylova N. Ivan Franko National University of Lviv, Universitetska vul. 1, 79000, Lviv, Ukraine aut NATIONALLICENCE 773 0- Astronomy Reports SP MAIK Nauka/Interperiodica 57/5(2013-05-01), 366-379 1063-7729 57:5<366 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer