Post-AGB stars

H Van Winckel - Annual Review of Astronomy and Astrophysics, 2003 - annualreviews.org
▪ Abstract In this contribution, a review is presented on the ample data obtained on post-AGB
stars, both on the central stars and their circumstellar material. The fast evolutionary phase is …

The origin and shaping of planetary nebulae: putting the binary hypothesis to the test

O De Marco - Publications of the Astronomical Society of the …, 2009 - iopscience.iop.org
Planetary nebulae (PNs) are circumstellar gas ejected during an intense mass-losing phase
in the lives of asymptotic giant branch stars. PNs have a stunning variety of shapes, most of …

The elemental abundances in bare planetary nebula central stars and the shell burning in AGB stars

K Werner, F Herwig - Publications of the Astronomical Society of …, 2006 - iopscience.iop.org
We review the observed properties of extremely hot, hydrogen‐deficient post–asymptotic
giant branch (AGB) stars of spectral type [WC] and PG1159. Their H deficiency is probably …

The rapid evolution of the born-again giant Sakurai's object

M Asplund, DL Lambert, T Kipper, D Pollacco… - arXiv preprint astro-ph …, 1998 - arxiv.org
The extraordinarily rapid evolution of the born-again giant Sakurai's object can be traced
both in a continued cooling of the stellar surface and dramatic changes in chemical …

Very large excesses of 18O in hydrogen-deficient carbon and R coronae borealis stars: Evidence for white dwarf mergers

GC Clayton, TR Geballe, F Herwig… - The Astrophysical …, 2007 - iopscience.iop.org
We have found that at least seven hydrogen-deficient carbon (HdC) and R Coronae Borealis
(RCB) stars, have 16 O/18 O ratios close to and in some cases less than unity, values that …

The Macho project LMC variable star inventory. X. The R Coronae Borealis stars

C Alcock, RA Allsman, DR Alves… - The Astrophysical …, 2001 - iopscience.iop.org
We report the discovery of eight new R Coronae Borealis (RCB) stars in the Large
Magellanic Cloud (LMC) using the MACHO project photometry database. The discovery of …

New light on Galactic post-asymptotic giant branch stars–I. First distance catalogue

SB Vickers, DJ Frew, QA Parker… - Monthly Notices of the …, 2015 - academic.oup.com
We have commenced a detailed analysis of the known sample of Galactic post-asymptotic
giant branch (PAGB) objects compiled in the Toruń catalogue of Szczerba et al., and …

What are the R coronae borealis stars?

GC Clayton - arXiv preprint arXiv:1206.3448, 2012 - arxiv.org
The R Coronae Borealis (RCB) stars are rare hydrogen-deficient, carbon-rich, supergiants,
best known for their spectacular declines in brightness at irregular intervals. Efforts to …

Sakurai's Object, V605 Aquilae, and FG Sagittae: An Evolutionary Sequence Revealed

TM Lawlor, J MacDonald - The Astrophysical Journal, 2003 - iopscience.iop.org
We have completed a grid of stellar evolution calculations to study the behavior of the born-
again phenomenon. All our evolutionary sequences begin with a uniform composition 1 M⊙ …

Carbon dust in the evolved born-again planetary nebulae A 30 and A 78

JA Toalá, P Jiménez-Hernández… - Monthly Notices of …, 2021 - academic.oup.com
We present an infrared (IR) characterization of the born-again planetary nebulae (PNe) A 30
and A 78 using IR images and spectra. We demonstrate that the carbon-rich dust in A 30 …