Star-powered LINERs in the Sloan Digital Sky Survey
N. Vale Asari (1,2), G. Stasinska (1), R. Cid Fernandes (2,1), J. M., Gomes (3,1), M. Schlickmann (2), A. Mateus (4), W. Schoenell (2), L. Sodre, Jr. (4) (for the SEAGal collaboration) ((1) LUTH, Observatoire de Paris,, France, (2) UFSC, Brazil, (3) GEPI, Observatoire de Paris
TL;DR
This paper suggests that many galaxies classified as LINERs in SDSS are actually ionized by hot post-AGB stars and white dwarfs, challenging the traditional active galaxy classification.
Contribution
It introduces a new interpretation for LINERs, proposing stellar sources as the primary ionizers rather than active galactic nuclei.
Findings
Many LINERs are ionized by hot post-AGB stars and white dwarfs.
Reevaluation of galaxy classification criteria based on diagnostic diagrams.
Implications for understanding galaxy evolution and activity.
Abstract
Galaxies are usually classified as star forming or active by using diagnostic diagrams, such as [N II]/Halpha vs. [O III]/Hbeta. Active galaxies are further classified into Seyfert or LINER-like sources. We claim that a non-negligible fraction of galaxies classified as LINERs in the Sloan Digital Sky Survey are in fact ionized by hot post-AGB stars and white dwarfs.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Galaxies: Formation, Evolution, Phenomena