Central Stars of Planetary Nebulae: New spectral classifications and catalogue

TL;DR

This paper presents a comprehensive catalogue and preliminary spectral classifications of 492 central stars of planetary nebulae, enhancing understanding of their properties and evolution, especially regarding hydrogen-poor stars.

Contribution

It provides the largest compiled catalogue of CSPN and introduces preliminary spectral classifications, updating the statistics on hydrogen-poor stars among CSPN.

Findings

Catalogue of 492 CSPN compiled.

Preliminary spectral classifications provided for 45 CSPN.

At least 30% of CSPN are hydrogen-poor.

Abstract

Context. There are more than 3000 true and probable known Galactic Planetary Nebulae (PNe), but only for 13% of them there is central star spectroscopic information available. Aims. To contribute to the knowledge of central stars of planetary nebulae and star evolution. Methods. We undertook a spectroscopic survey of central stars of PNe in low resolution and compiled a large list of central stars for which information was dispersed in the literature. Results. We complete a catalogue of 492 true and probable CSPN and we provide a preliminary spectral classification for 45 central star of PNe, This made it possible to update the proportion of CSPN with atmosphere poor in hydrogen with regard to the whole in at least 30% and contribute with statistical information that allow to infer the origin of H-poor stars.