| Issue |
A&A
Volume 684, April 2024
|
|
|---|---|---|
| Article Number | A118 | |
| Number of page(s) | 15 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202348829 | |
| Published online | 10 April 2024 | |
A comprehensive search for hot subdwarf stars using Gaia and TESS
I. Pulsating hot subdwarf B stars★
1
Institute of Astronomy, KU Leuven,
Celestijnenlaan 200D,
3001
Leuven,
Belgium
e-mail: murat.uzundag@kuleuven.be
2
Astronomical Observatory, Jagiellonian University,
ul. Orla 171,
30-244
Krakow,
Poland
3
Department of Physics, University of Warwick,
Gibbet Hill Road,
Coventry
CV4 7AL,
UK
4
Astronomical Institute of the Czech Academy of Sciences,
251 65,
Ondřejov,
Czech Republic
5
Astroserver.org,
Főtér 1,
8533
Malomsok,
Hungary
6
INAF-Osservatorio Astrofisico di Torino,
strada dell’Osservatorio 20,
10025
Pino Torinese,
Italy
7
Instituto de Física y Astronomía, Universidad de Valparaíso,
Gran Bretaña 1111,
Playa Ancha,
Valparaíso
2360102,
Chile
8
Institute for Physics and Astronomy, University of Potsdam,
Karl-Liebknecht-Str. 24/25,
14476
Potsdam,
Germany
Received:
3
December
2023
Accepted:
31
January
2024
Hot subdwarf B (sdB) stars are evolved, subluminous, helium-burning stars that most likely form when red giant stars loose their hydrogen envelope via interactions with close companions. They play an important role in our understanding of binary evolution, stellar atmospheres, and interiors. Only a small fraction of the sdB population is known to exhibit pulsations. Pulsating sdBs have typically been discovered serendipitously in various photometric surveys because specific selection criteria for the sample are lacking. Consequently, while individual properties of these stars are well known, a comprehensive understanding of the entire population remains elusive, and many related questions remain unanswered. The Gaia mission has presented an exceptional chance to create an unbiased sample by employing precise criteria and ensuring a high degree of completeness. The progression of high-precision and high-duty cycle photometric monitoring facilitated by space missions such as Kepler/K2 and the Transiting Exoplanet Survey Satellite (TESS) has yielded an unparalleled wealth of data for pulsating sdBs. We created a dataset of confirmed pulsating sdB stars by combining information from various ground- and space-based photometric surveys. With this dataset, we present a thorough approach to search for pulsating sdB stars based on the current Gaia DR3 sample. Based on TESS photometry, we discovered 61 new pulsating sdB stars and 20 variable sdBs whose source of variability remains to be determined through future spectroscopic follow-up observations.
Key words: catalogs / stars: evolution / stars: horizontal-branch / stars: late-type / stars: oscillations / subdwarfs
Table A.3 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/684/A118
© 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.
This article is published in open access under the Subscribe to Open model. Subscribe to A&A to support open access publication.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.