Oudmaijer, RD, Jones, ERM and Vioque, M (2022) A census of post-AGB stars in Gaia DR3: evidence for a substantial population of Galactic post-RGB stars. Monthly Notices of the Royal Astronomical Society: Letters, 516 (1). L61-L65. ISSN 1745-3925
Abstract
This paper presents the first census of Galactic post-asymptotic giant branch (post-AGB) stars in the Hertzsprung–Russell (HR) diagram. We combined Gaia DR3 parallax-based distances with extinction corrected integrated fluxes and derived luminosities for a sample of 185 stars that had been proposed to be post-AGB stars in the literature. The luminosities allow us to create an HR diagram containing the largest number of post-AGB candidate objects to date. A significant fraction of the objects fall outside the typical luminosity range as covered by theoretical evolutionary post-AGB tracks as well as observed for planetary nebula central stars. These include massive evolved supergiants and lower luminosity objects. Here, we highlight the fact that one-third of the post-AGB candidates are underluminous and we identify these with the recently recognized class of post-red giant branch objects thought to be the result of binary evolution.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. This is an author produced version of an article published in Monthly Notices of the Royal Astronomical Society: Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | parallaxes, stars: AGB and post-AGB, stars: evolution, stars: distances, stars: binaries: general, stars: Hertzsprung-Russell and colour-magnitude diagrams |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Nov 2022 15:44 |
Last Modified: | 11 Nov 2022 22:30 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Identification Number: | 10.1093/mnrasl/slac088 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:193199 |