Are planetary nebulae derived from multiple evolutionary scenarios?
D. J. Frew (1,2), Q. A. Parker (1,2,3) ((1) Department of Physics and, Astronomy, Macquarie University, (2) Macquarie University Research Centre in, Astronomy, Astrophysics, Astrophotonics, (3) Australian Astronomical, Observatory)

TL;DR
Recent large surveys reveal that planetary nebulae are more diverse than previously thought, with multiple evolutionary pathways contributing to their formation, challenging the traditional single-scenario understanding.
Contribution
This paper summarizes various evolutionary pathways leading to planetary nebulae, highlighting the heterogeneity and complexity of their origins.
Findings
Diverse population of planetary nebulae identified
Multiple evolutionary scenarios implicated in PN formation
Surveys reveal heterogeneity beyond previous models
Abstract
Our understanding of planetary nebulae has been significantly enhanced as a result of several recent large surveys (Parker et al., these proceedings). These new discoveries suggest that the `PN phenomenon' is in fact more heterogeneous than previously envisaged. Even after the careful elimination of mimics from Galactic PN catalogues, there remains a surprising diversity in the population of PNe and especially their central stars. Indeed, several evolutionary scenarios are implicated in the formation of objects presently catalogued as PNe. We provide a summary of these evolutionary pathways and give examples of each. Eventually, a full census of local PNe can be used to confront both stellar evolution theory and population synthesis models.
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