2023MNRAS.519.1437L

Query : 2023MNRAS.519.1437L

2023MNRAS.519.1437L - Mon. Not. R. Astron. Soc., 519, 1437-1451 (2023/February-2)

Discovery of TOI-1260d and the characterization of the multiplanet 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 G., LUQUE R., EGGER J.A., ADIBEKYAN V., ALONSO R., ESCUDE G.A., 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., CAMERON A.C., CSIZMADIA S., 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., GUEDEL 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 G.M., THOMAS N., UDRY S., VAN GROOTEL V., WALTON N.A. and WINN J.N.

Abstract (from CDS):

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 d, respectively. The nature of the third transiting planet with a 16.6-d 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 and TOI-1260c are $2.36 \pm 0.06 \rm R_{\oplus }$, $2.82 \pm 0.08 \rm R_{\oplus }$, respectively while the newly discovered third planet has a radius of $3.09 \pm 0.09 \rm R_{\oplus }$. The radius uncertainties are in the range of 3 per cent, 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.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: composition - planets and satellites: detection - planets and satellites: individual: TOI-1260b, c, d - stars: individual: TOI-1260

VizieR on-line data: <Available at CDS (J/MNRAS/519/1437): 1-visit[1234].dat 2-visit[1234].dat visit5.dat>

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LP 62-217 PM* 10 28 35.0250921216 +65 51 16.381197180   13.351 11.973 11.649   ~ 21 0
2 NAME LP 62-217c Pl 10 28 35.0250921216 +65 51 16.381197180           ~ 7 0
3 NAME LP 62-217b Pl 10 28 35.0250921216 +65 51 16.381197180           ~ 11 0
4 NAME LP 62-217d Pl 10 28 35.0250921216 +65 51 16.381197180           ~ 2 0

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