J/A+A/704/A174 CHEOPS light curves pf TOI-2141 (Luque+, 2025)
Improved characterization of the TOI-2141 system:
A dense sub-Neptune with non-transiting inner and outer companions.
Luque R., Lam K.W.F., Cabrera J., Bonfanti A., Eschen Y., Olofsson G.,
Benz W., Billot N., Brandeker A., Correia A.C.M., Fossati L., Gandolfi D.,
Osborn H.P., Pezzotti C., Sousa S.G., Wilson T.G., Wolf S., Alibert Y.,
Alonso R., Asquier J., Barczy T., Barrado D., Barros S.C., Baumjohann W.,
Biondi F., Borsato L., Broeg C., Collier Cameron A., Csizmadia Sz.,
Cubillos P.E., Davies M.B., Deleuil M., Deline A., Demangeon O.D.S.,
Demory B.-O., Derekas A., Edwards B., Egger J.A., Ehrenreich D., Erikson A.,
Fortier A., Fridlund M., Gazeas K., Gillon M., Guedel M., Guenther M.N.,
Heitzmann A., Helling C., Isaak K.G., Keller T., Kiss L., Korth J.,
Laskar J., Lecavelier des Etangs A., Leleu A., Lendl M., Magrin D.,
Mantovan G., Maxted P.F.L., Merin B., Mordasini C., Nascimbeni V.,
Ottensamer R., Pagano I., Palle E., Peter G., Piazza D., Piotto G.,
Pollacco D., Queloz D., Ragazzoni R., Rando N., Rauer H., Ribas I.,
Santos N.C., Scandariato G., Segransan D., Simon A.E., Smith A.M.S.,
Stalport M., Sulis S., Szabo M.Gy., Udry S., Ulmer B., Ulmer-Moll S.,
Van Grootel V., Venturini J., Villaver E., Walton N.A., Wolter D.
<Astron. Astrophys. 704, A174 (2025)>
=2025A&A...704A.174L 2025A&A...704A.174L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Stars, G-type ;
Photometry ; Optical
Keywords: techniques: photometric - techniques: radial velocities -
planetary systems - planets and satellites: individual: TOI-2141 -
stars: solar-type
Abstract:
We aim to refine the fundamental parameters of the TOI-2141 planetary
system, which includes a transiting sub-Neptune orbiting a Sun-like
star in a relatively long orbit of 18.26 days, by combining new
photometric and spectroscopic observations. We analyze new space-based
photometry from TESS and CHEOPS as well as 61 radial velocity
measurements from HARPS-N. We perform individual and joint photometric
and RV analyses using several modeling tools within a Bayesian model
comparison framework. We refine the radius and mass of the transiting
planet TOI-2141 b to 3.15±0.04R⊕ and 20.1±1.6M⊕,
respectively, five and two times more precise than the previously
reported values. Our radial velocity analysis reveals two additional
non-transiting companions with orbital periods of 5.46 and 60.45 days.
Despite the innermost planet's high geometric transit probability, we
find no evidence for transits in the photometric data. The bulk
properties of TOI-2141 b suggest a significant volatile envelope atop
an Earth-like core, with modeling indicating a hydrogen-rich
atmosphere that may have experienced mild photoevaporation over the
system's history. Planets b and c must exhibit a modest mutual
inclination of at least 2.4 degrees.
Description:
Five visits of CHEOPS photometric observations of TOI-2141. Each
dataset contains the raw and detrended fluxes of each visit.
Objects:
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RA (2000) DE Designation(s)
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17 15 02.90 +18 20 26.7 TOI-2141 = BD+18 3330
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
visit1.dat 62 455 CHEOPS visit 1 (2023-05-05) light curve
visit2.dat 62 617 CHEOPS visit 2 (2023-06-10) light curve
visit3.dat 62 518 CHEOPS visit 3 (2023-06-28) light curve
visit4.dat 62 502 CHEOPS visit 4 (2024-06-28) light curve
visit5.dat 62 400 CHEOPS visit 5 (2024-07-16) light curve
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See also:
J/A+A/680/A84 : TOI-1736 and TOI-2141 SOPHIE observations (Martioli+, 2023)
Byte-by-byte Description of file: visit?.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d Time Barycentric Julian date (TDB)
18- 27 F10.8 --- Fluxraw Raw relative flux
29- 38 F10.8 --- e_Fluxraw Raw relative flux error
40- 49 F10.8 --- Fluxdetr Detrended relative flux
51- 60 F10.8 --- e_Fluxdetr Detrended relative flux error
62 I1 --- VisitNumber [1/5] Visit number
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Acknowledgements:
Kristine Lam, Kristine.Lam(at)dlr.de
(End) Patricia Vannier [CDS] 28-Oct-2025