J/A+A/712/A33 32 naked-eye stars seismic characterisation (Panetier+, 2026)
Luminaries in the Sky: The TESS LEGACY Sample of Bright Stars. II.
In-depth seismic characterisation of 32 naked-eye stars in the PLATO LOP fields.
Panetier E., Hookway G.T., Corsaro E., Breton S.N., Garcia R.A., Liagre B.,
Lund M.N., Nielsen M.B., Palakkatharappil D.B., Debacker L., Gosmain J.,
Chaumard M., Chontos A., Grundahl F., Mathur S., Santos A.R.G.
<Astron. Astrophys. 712, A33 (2026)>
=2026A&A...712A..33P 2026A&A...712A..33P (SIMBAD/NED BibCode)
ADC_Keywords: Asteroseismology ; Stars, bright; Stars, dwarfs; Stars, subdwarf;
Stars, G-type; Stars, F-type
Keywords: asteroseismology - methods: data analysis - stars: oscillations -
stars: solar-type
Abstract:
The Transiting Exoplanet Survey Satellite (TESS) is conducting a
nearly full-sky survey, enabling the photometric characterisation of
millions of stars. The forthcoming PLAnetary Transits and Oscillations
of stars mission (PLATO) will provide long-duration, high-precision
photometry of tens of thousands of bright stars to be characterised
through asteroseismology. The TESS Luminaries Sample is a catalogue of
196 bright naked-eye (V<6) main-sequence (MS) and sub-giant (SG)
stars exhibiting solar-like oscillations. Among them, the subset
located within the PLATO Long-duration Observation Phase (LOP) fields
constitutes an exceptional set of targets that will be observable by
PLATO from the earliest phases of the mission, making them ideal
calibrators during commissioning and the first months of science
operations. This paper aims to provide an in-depth asteroseismic
characterisation of 32 Luminaries stars that fall within the PLATO LOP
fields of view. Individual mode parameters were extracted using three
independent seismic pipelines, one of which was similar to the
algorithms used in the official PLATO pipeline. The Peirce criterion
and a Z-score were applied to identify the optimal combination of data
calibration, observing cadence, and fitting pipeline for each star. We
analyse 32 MS and SG stars up to TESS Sector 88, with individual mode
frequencies derived for the first time for 26 of them. For all stars,
we derived large and small separations, the asymptotic phase term
epsilon, radial mode amplitudes, and mean linewidths per order.
Comparisons with previous Kepler observations reveal consistent trends
in the seismic parameters, confirming the robustness of our analysis
based on TESS data. In sub-giants, mixed-mode identification differs
in the three pipelines, revealing extraction inconsistencies requiring
longer datasets to improve our mode identifications. These results
demonstrate the capability of TESS to deliver high-quality
asteroseismic observations for MS and SG stars. The Luminaries stars
located in the PLATO LOP fields constitute a unique sample that will
play a crucial role in validating, calibrating, and optimising
PLATO's seismic performance from the earliest stages of the mission.
Description:
The table lists the oscillation mode frequencies extracted for the
optimal light curve of each target. Frequencies were obtained
independently with the apollinaire, FAMED, and PBjam pipelines. For
each pipeline, the mode frequency and the associated lower and upper
uncertainties are provided when available. The final column indicates
the flag for minimal (1) and maximal (2) list as defined in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 38 29 List of studied sources
freqs.dat 110 1123 Extracted mode frequencies for the optimal
light curve of all 29 sources
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Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [TIC]
5- 13 I9 --- TIC TIC number
16- 17 I2 h RAh Simbad right ascension (J2000)
19- 20 I2 min RAm Simbad right ascension (J2000)
22- 26 F5.2 s RAs Simbad right ascension (J2000)
28 A1 --- DE- Simbad declination sign (J2000)
29- 30 I2 deg DEd Simbad declination (J2000)
32- 33 I2 arcmin DEm Simbad declination (J2000)
35- 38 F4.1 arcsec DEs Simbad declination (J2000)
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See also:
J/A+A/701/A285 : TESS Luminaries Sample. I. (Lund+, 2025)
Byte-by-byte Description of file: freqs.dat
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Bytes Format Units Label Explanations
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2- 10 I9 --- TIC TESS Input Catalog identifier
12- 14 I3 --- n Radial order (3)
17 I1 --- l Angular degree
20- 27 F8.3 uHz FreqA ? Mode frequency from apollinaire (1)
33- 37 F5.3 uHz e_FreqA ? Lower uncertainty of FreqA (apollinaire)
43- 47 F5.3 uHz E_FreqA ? Upper uncertainty of FreqA (apollinaire)
50- 57 F8.3 uHz FreqF ? Mode frequency from FAMED (1)
63- 67 F5.3 uHz e_FreqF ? Lower uncertainty of FreqF (FAMED)
73- 77 F5.3 uHz E_FreqF ? Upper uncertainty of FreqF (FAMED)
80- 87 F8.3 uHz FreqP ? Mode frequency from PBjam (1)
93- 97 F5.3 uHz e_FreqP ? Lower uncertainty of FreqP (PBjam)
103-107 F5.3 uHz E_FreqP ? Upper uncertainty of FreqP (PBjam)
110 I1 --- Flag Minimal or maximal list flag (2)
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Note (1): If one or more pipelines were not applied to a given star, the
corresponding frequency columns are left blank. Likewise, if a mode is not
reported by a given pipeline, it means that the mode was not fitted by that
pipeline.
Note (2): Level of agreement between pipelines. When only one pipeline is used
for a given star, or when no consensus in mode identification is reached,
this column is set to 0. When two or three pipelines are used, the value is:
1 = minimal list, when all available pipelines agree on the detection
2 = maximal list, when the mode is not detected by only one pipeline
3 = others, in the case of stars fitted by the three pipelines, when the
mode is detected by only one pipeline.
Note (3): For mixed modes, pipelines do not always assign a physically
meaningful radial order. Therefore, the values of n should be considered
indicative. Mixed modes are labelled with n≥100 to distinguish them from
pure p modes.
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Acknowledgements:
Eva Panetier, eva.panetier(at)cea.fr
License: CC-BY-4.0
References:
Lund at al., 2025A&A...701A.285L 2025A&A...701A.285L Cat. J/A+A/701/A285
Definition of the TESS Luminaries sample
Breton et al., 2022A&A...663A.118B 2022A&A...663A.118B
Description of the apollinaire pipeline
Nielsen et al., 2021AJ....161...62N 2021AJ....161...62N
Description of the PBjam pipeline
Nielsen et al., 2025AJ....169..322N 2025AJ....169..322N
Description of the PBjam 2.0 pipeline
Corsaro & de Ridder, 2014A&A...571A..71C 2014A&A...571A..71C
Description of the DIAMONDS tool
Corsaro et al., 2012A&A...540A.130S 2012A&A...540A.130S
Description of the FAMED pipeline
(End) E. Panetier [Univ. Paris-Cite, CEA Saclay], P. Vannier [CDS] 04-Jun-2026