| Issue |
A&A
Volume 682, February 2024
|
|
|---|---|---|
| Article Number | A88 | |
| Number of page(s) | 10 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202346163 | |
| Published online | 07 February 2024 | |
Investigating the long secondary period phenomenon with the ASAS-SN and Gaia data★
1
Astronomical Observatory, Jagiellonian University,
ul. Orla 171,
30-244
Kraków,
Poland
2
Lund Observatory, Division of Astrophysics, Department of Physics, Lund University,
Box 43,
221 00
Lund,
Sweden
e-mail: michal.pawlak@fysik.lu.se
3
Dipartimento di Fisica e Astronomia Galileo Galilei, Università degli studi di Padova,
Vicolo dell’Osservatorio 3,
35122
Padova,
Italy
4
Department of Astronomy, University of Geneva,
Chemin Pegasi 51,
1290
Versoix,
Switzerland
5
Department of Astronomy, University of Geneva,
Chemin d’Ecogia 16,
1290
Versoix,
Switzerland
Received:
16
February
2023
Accepted:
14
November
2023
Aims. The aim of this work is to create a complete list of sources exhibiting a long secondary period (LSP) in the ASAS-SN catalog of variable stars, and analyze the properties of this sample compared to other long period variables without an LSP.
Methods. We used the period-amplitude diagram to identify the 55 572 stars showing an LSP, corresponding to 27% of the pulsating red giants in the catalog. We used astrometric data from Gaia DR3 and spectroscopic data provided by the APOGEE, GALAH, and RAVE surveys to investigate the statistical properties of the sample.
Results. We find that stars displaying an LSP have a spatial distribution that is more dispersed than that of the non-LSP giants, suggesting that they belong to an older population. Spectroscopically derived ages seem to confirm this. The stars with an LSP also appear to be different in terms of the C/O ratio from their non-LSP counterparts.
Key words: stars: AGB and post-AGB / pulsars: general / stars: variables: general
The catalogue is available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/682/A88
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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