J/A+A/684/A118 Pulsating hot subdwarf B stars (Uzundag+, 2024)
A comprehensive search for hot subdwarf stars using Gaia and TESS.
l. Pulsating hot subdwarf B stars.
Uzundag M., Krzesinski J., Pelisoli I., Nemeth P., Silvotti R., Vuckovic M.,
Dawson H., Geier S.
<Astron. Astrophys. 684, A118 (2024)>
=2024A&A...684A.118U 2024A&A...684A.118U (SIMBAD/NED BibCode)
ADC_Keywords: Stars, subdwarf ; Stars, distances ; Effective temperatures
Keywords: catalogues - stars: evolution - stars: horizontal branch -
stars: late-type - stars: oscillations - subdwarfs
Abstract:
Hot subdwarf B (sdB) stars are evolved, subluminous, helium-burning
stars, most likely formed when red-giant stars lose their hydrogen
envelope via interactions with close companions. They play an
important role in our understanding of binary evolution, stellar
atmospheres, and interiors. Within the sdB population, only a small
fraction are known to exhibit pulsations. Pulsating sdBs have
typically been discovered serendipitously in various photometric
surveys, lacking specific selection criteria for the sample.
Consequently, while individual properties of these stars are
well-known, a comprehensive understanding of the entire population and
many related questions remain unanswered. The introduction of Gaia 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. In this work, we
created a dataset of confirmed pulsating sdB stars by combining
information from various ground- and space-based photometric surveys.
Utilizing this dataset, we present a thorough approach to search for
pulsating sdB stars based on the current Gaia DR3 sample. Using 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.
Description:
In this study, we have compiled a catalog comprising 256 known
pulsating hot subdwarf stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea3.dat 154 256 Catalogue of all 256 known pulsating hot subdwarfs
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 10 I10 --- TIC TIC identification number
12- 44 A33 --- Name Name
46- 53 F8.4 deg RAdeg Right ascension (J2000)
55- 62 F8.4 deg DEdeg Declination (J2000)
64- 69 I6 K Teff ?=- Effective temperature
71- 76 F6.1 K e_Teff ?=- Effective temperature error
78- 81 F4.2 [cm2/s] logg ?=- Surface gravity
83- 86 F4.2 [cm2/s] e_logg ?=- Surface gravity error
88- 92 F5.2 --- log(n(He)/n(H)) ?=- Abundance ratio n(He)/n(H)
94- 97 F4.2 --- e_log(n(He)/n(H)) ?=- Abundance ratio n(He)/n(H) error
99-102 I4 pc Dist ?=- Distance
105-108 I4 pc E_Dist ? Distance error (upper value)
111-114 I4 pc e_Dist ? Distance error (lower value)
116-154 A39 --- Ref Reference(s)
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Acknowledgements:
Murat Uzundag, muratuzundag.astro(at)gmail.com
(End) Patricia Vannier [CDS] 06-Feb-2024