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Alternative classification diagrams for AGN-starburst galaxies

Published online by Cambridge University Press:  29 March 2021

Catarina P. Aydar Open the ORCID record for Catarina P. Aydar [Opens in a new window] ,
J. E. Steiner  and
Oli Dors Jr Open the ORCID record for Oli Dors Jr [Opens in a new window]
Catarina P. Aydar
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosférias, Universidade de São Paulo, 05508-090, São Paulo, SP, Brazil email: [email protected]
J. E. Steiner
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosférias, Universidade de São Paulo, 05508-090, São Paulo, SP, Brazil email: [email protected]
Oli Dors Jr
Affiliation:
Instituto de Pesquisa & Desenvolvimento, Universidade do Vale do Paraíba, 12244-390, São José dos Campos, SP, Brazil
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Abstract

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The aim of diagnostic diagrams is to classify galactic nuclei according to their photoionizing source using emission-line ratios, differentiating starburst regions from active galactic nuclei (AGN). However, the three traditional diagnostic diagrams can sometimes be ambiguous with regard to a single object. The main goal of the present work is to propose alternative diagnostic diagrams by using distinct combinations of emission lines ratios. We present these diagrams using data from the Sloan Digital Sky Survey. With these new diagrams, it is possible to better distinguish the ionizing source in nuclei of galaxies and also to study the parameters that are relevant when considering both kinds of objects, starbursts and AGN.

Keywords

galaxies: nucleigalaxies: activegalaxies: abundancesgalaxies: starburst
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 415 - 417
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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