J/MNRAS/516/L61 Galactic post-AGB stars in Gaia DR3 (Oudmaijer+, 2022)
A census of post-AGB stars in Gaia DR3:
evidence for a substantial population of Galactic post-RGB stars.
Oudmaijer R.D., Jones E.R.M., Vioque M.
<Mon. Not. R. Astron. Soc. 516, L61-L65 (2022)>
=2022MNRAS.516L..61O 2022MNRAS.516L..61O (SIMBAD/NED BibCode)
ADC_Keywords: Stars, giant ; Parallaxes, trigonometric ; Stars, distances ;
Effective temperatures
Keywords: parallaxes - stars: AGB and post-AGB - stars: evolution -
stars: distances - stars: binaries: general -
stars: Hertzsprung-Russell and colour-magnitude diagrams
Abstract:
This paper presents the first census of Galactic post-asymptotic Giant
Branch stars in the 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 is underluminous and we identify these with the recently
recognised class of post-Red Giant Branch objects thought to be the
result of binary evolution.
Description:
The catalogue of post-AGB stars with parallax information, their
astrometric data and derived parameters used in this article are
available in this table (i.e. the 249 sources from Vickers et al.
(2015MNRAS.447.1673V 2015MNRAS.447.1673V, Cat. J/MNRAS/447/1673) for which parallax
information is available).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
post-agb.dat 182 249 Post-AGB stars catalogue
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See also:
J/A+A/469/799 : Torun catalog of post-AGB & related objects (Szczerba+ 2007)
J/MNRAS/447/1673 : Galactic post-AGB stars distances (Vickers+, 2015)
Byte-by-byte Description of file: post-agb.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 Gaia DR3 source id
21- 39 A19 --- SIMBAD SIMBAD main name
41- 42 I2 h RAh Right Ascension (J2000)
44- 45 I2 min RAm Right Ascension (J2000)
47- 50 F4.1 s RAs Right Ascension (J2000)
52 A1 --- DE- Declination sign (J2000)
53- 54 I2 deg DEd Declination (J2000)
56- 57 I2 arcmin DEm Declination (J2000)
59- 60 I2 arcsec DEs Declination (J2000)
62- 69 A8 --- SpType Spectral Type
71- 75 F5.3 [K] logTeff ? Effective temperature (log)
77- 85 F9.6 mas plx Gaia DR3 parallax
87- 93 F7.5 mas e_plx Gaia DR3 parallax error
95-101 F7.4 --- RUWE RUWE parameter from Gaia DR3
103-109 F7.4 kpc Dist Distances from Bailer-Jones et al.
(2021, 2021AJ....161..147B 2021AJ....161..147B, Cat. I/352)
111-123 F13.10 kpc E_Dist Upper error on distance
125-136 F12.10 kpc e_Dist Lower error on distance
138-147 F10.3 Lsun Lum Stellar luminosity
149-163 F15.8 Lsun E_Lum Upper error on luminosity
165-180 F16.9 Lsun e_Lum Lower error on luminosity
182 I1 --- CatV [1/3] Vickers category (1)
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Note (1): Indicates the post-AGB likelihood classification from Szczerba et al.
(2007A&A...469..799S 2007A&A...469..799S Cat. J/A+A/469/799) and Vickers et al.
(2015MNRAS.447.1673V 2015MNRAS.447.1673V, Cat. J/MNRAS/447/1673) as follows:
1 = for the likely category
2 = for the possible category
3 = for the miscellaneous category
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History:
From Miguel Vioque, miguel.vioque(at)alma.cl
Acknowledgements:
This work has made use of data from the European Space Agency (ESA)
mission Gaia (https://www.cosmos.esa.int/ gaia), processed by the Gaia
Data Processing and Analysis Consortium (DPAC,
https://www.cosmos.esa.int/web/gaia/ dpac/consortium). Funding for the
DPAC has been provided by national institutions, in particular the
institutions participating in the Gaia Multilateral Agreement.
References:
Szczerba et al., 2007A&A...469..799S 2007A&A...469..799S Cat. J/A+A/469/799
Vickers et al., 2015MNRAS.447.1673V 2015MNRAS.447.1673V, Cat. J/MNRAS/447/1673
(End) Patricia Vannier [CDS] 01-Sep-2022