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Abundance determinations in the dIrr galaxy Leo A

Published online by Cambridge University Press:  30 October 2019

Francisco Ruiz-Escobedo ,
Miriam Peña ,
Liliana Hernández-Martínez  and
Jorge García-Rojas
Francisco Ruiz-Escobedo
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Apdo. Postal 70264, Ciudad de México, 04510, México email: fdruiz, [email protected]
Miriam Peña
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Apdo. Postal 70264, Ciudad de México, 04510, México email: fdruiz, [email protected]
Liliana Hernández-Martínez
Affiliation:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apdo. Postal 70543, Ciudad de México, 04510, México email: [email protected]
Jorge García-Rojas
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38200; Universidad de La Laguna, Dept. Astrofísica. E-38206, La Laguna, Tenerife, Spain email: [email protected]
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Abstract

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Physical conditions and chemical abundances of two H II regions and a planetary nebula in the dIrr galaxy Leo A are presented. These determinations were performed using the direct method (Te measured) and the ONS method. We also constructed photoionization models for the three nebulae to determine the abundances and to analyse the ionizing stars. The O abundance was determined to be 12+log(O/H) = 7.4±0.2 in all cases.

Keywords

galaxies: irregularsgalaxies : individual (Leo A)galaxies: ISMISM: abundancesplanetary nebulae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 217 - 219
Copyright
© International Astronomical Union 2019 

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