J/MNRAS/519/1437 The TOI-1260 system (Lam+, 2023)
Discovery of TOI-1260d and the characterisation of the multi-planet system.
Lam K.W.F., Cabrera J., Hooton M.J., Alibert Y., Bonfanti A., Beck M.,
Deline A., Floren H.-G., Simon A.E., Fossati L., Persson C.M., Fridlund M.,
Salmon S., Hoyer S., Osborn H.P., Wilson T.G., Georgieva I.Y., Nowak Gr.,
Luque R., Egger J.A., Abidekyan V., Alonso R., Anglada Escude G., Barczy T.,
Barrado D., Barros S.C.C., Baumjohann W., Beck T., Bekkelien A., Benz W.,
Billot N., Bonfils X., Brandeker A., Broeg C., Charnoz S.,
Collier Cameron A., Csizmadia Sz., Davies M.B., Deleuil M., Delrez L.,
Demangeon O.D.S., Demory B.-O., Ehrenreich D., Erikson A., Fortier A.,
Futyan D., Gandolfi D., Gillon M., Guede M., Guterman P., Laskar J.,
Latham D.W., Lecavelier des Etangs A., Lendl M., Lovis C., Heng K.,
Isaak K.G., Kiss L., Magrin D., Maxted P.F.L., Nascimbeni V.,
Olofsson G., Ottensamer R., Pagano I., Palle E., Peter G., Piotto G.,
Pollacco D., Queloz D., Ribas I., Ragazzoni R., Rando N., Rauer H.,
Santos N.C., Scandariato G., Seager S., Segransan D., Serrano L.M.,
Smith A.M.S., Sousa S.G., Steller M., Szabo Gy.M., Thomas N., Udry S.,
Van Grootel V., Walton N.A., Winn J.N.
<Mon. Not. R. Astron. Soc. 519, 1437-1451 (2023)>
=2023MNRAS.519.1437L 2023MNRAS.519.1437L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry ; Optical
Keywords: techniques: photometric - techniques: radial velocities -
planets and satellites: composition -
planets and satellites: detection -
planetary systems, planets and satellites: individual: TOI-1260b,c,d -
stars: individual: TOI-1260
Abstract:
We report the discovery of a third planet transiting the star
TOI-1260, previously known to host two transiting sub-Neptune planets
with orbital periods of 3.127 and 7.493 days, respectively. The nature
of the third transiting planet with a 16.6-day orbit is supported by
ground-based follow-up observations, including time-series photometry,
high-angular resolution images, spectroscopy, and archival imagery.
Precise photometric monitoring with CHEOPS allows to improve the
constraints on the parameters of the system, improving our knowledge
on their composition. The improved radii of TOI-1260b, TOI-1260c are
2.36±0.06R⊕, 2.82±0.08±R⊕, respectively while
the newly discovered third planet has a radius of
3.09±0.09R⊕. The radius uncertainties are in the range of
3%, allowing a precise interpretation of the interior structure of the
three planets. Our planet interior composition model suggests that all
three planets in the TOI-1260 system contains some fraction of gas.
The innermost planet TOI-1260b has most likely lost all of its
primordial hydrogen-dominated envelope. Planets c and d were also
likely to have experienced significant loss of atmospheric through
escape, but to a lesser extent compared to planet b.
Description:
TOI-1260 was observed by TESS during sector 14 (between 2019 July 18
and August 15 on camera 4, CCD 3) and sector 21 (between 2020 January
21 and February 18 on camera 2, CCD 2) in 2-min short-cadence mode.
This data set was previously analysed in G21. The target was further
observed in sector 41 (between 2021 July 23 and August 20) in 2-min
and 20-s cadence mode.
The data were obtained from CHEOPS program CH_PR100031.
Objects:
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RA (2000) DE Designation(s)
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10 28 35.02 +65 51 16.3 TOI-1260 = TIC 355867695
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
1-visit1.dat 74 268 CHEOPS transit of TOI-1260b
(Filekey: CHPR100031TG036501_V0200)
1-visit2.dat 74 247 CHEOPS transit of TOI-1260b
(Filekey: CHPR100031TG036502_V0200)
1-visit3.dat 74 270 CHEOPS transit of TOI-1260b
(Filekey: CHPR100031TG036504_V0200)
1-visit4.dat 74 265 CHEOPS transit of TOI-1260b
(Filekey: CHPR100031TG036505_V0200)
2-visit1.dat 74 285 CHEOPS transit of TOI-1260c
(Filekey: CHPR100031TG018501_V0200)
2-visit2.dat 74 262 CHEOPS transit of TOI-1260c
(Filekey: CHPR100031TG018502_V0200)
2-visit3.dat 74 272 CHEOPS transit of TOI-1260c
(Filekey: CHPR100031TG018503_V0200)
2-visit4.dat 74 285 CHEOPS transit of TOI-1260c
(Filekey: CHPR100031TG018504_V0200)
visit5.dat 74 489 CHEOPS transit of TOI-1260b, c, d
(Filekey: CHPR100031TG038201_V0200)
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Byte-by-byte Description of file: *visit*.dat
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Bytes Format Units Label Explanations
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1- 24 E24.18 d BJD Time
26- 49 E24.18 --- Flux Normalized flux
51- 74 E24.18 --- e_Flux Normalized flux error
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Acknowledgements:
Kristine Lam, Kristine.Lam(at)dlr.de
(End) Patricia Vannier [CDS] 02-Dec-2022