SIMBAD references

2021NatAs...5..775D - Nature Astronomy, 5, 775-787 (2021/August-0)

Transit detection of the long-period volatile-rich super-Earth ν2 Lupi d with CHEOPS.

DELREZ L., EHRENREICH D., ALIBERT Y., BONFANTI A., BORSATO L., FOSSATI L., HOOTON M.J., HOYER S., POZUELOS F.J., SALMON S., SULIS S., WILSON T.G., ADIBEKYAN V., BOURRIER V., BRANDEKER A., CHARNOZ S., DELINE A., GUTERMAN P., HALDEMANN J., HARA N., OSHAGH M., SOUSA S.G., VAN GROOTEL V., ALONSO R., ANGLADA-ESCUDE G., BARCZY T., BARRADO D., BARROS S.C.C., BAUMJOHANN W., BECK M., BEKKELIEN A., BENZ W., BILLOT N., BONFILS X., BROEG C., CABRERA J., COLLIER CAMERON A., DAVIES M.B., DELEUIL M., DELISLE J.-B., DEMANGEON O.D.S., DEMORY B.-O., ERIKSON A., FORTIER A., FRIDLUND M., FUTYAN D., GANDOLFI D., GARCIA MUNOZ A., GILLON M., GUEDEL M., HENG K., KISS L., LASKAR J., LECAVELIER DES ETANGS A., LENDL M., LOVIS C., MAXTED P.F.L., NASCIMBENI V., OLOFSSON G., OSBORN H.P., PAGANO I., PALLE E., PIOTTO G., POLLACCO D., QUELOZ D., RAUER H., RAGAZZONI R., RIBAS I., SANTOS N.C., SCANDARIATO G., SEGRANSAN D., SIMON A.E., SMITH A.M.S., STELLER M., SZABO G.M., THOMAS N., UDRY S. and WALTON N.A.

Abstract (from CDS):

Exoplanets transiting bright nearby stars are key objects for advancing our knowledge of planetary formation and evolution. The wealth of photons from the host star gives detailed access to the atmospheric, interior and orbital properties of the planetary companions. ν2 Lupi (HD 136352) is a naked-eye (V = 5.78) Sun-like star that was discovered to host three low-mass planets with orbital periods of 11.6, 27.6 and 107.6 d via radial-velocity monitoring. The two inner planets (b and c) were recently found to transit, prompting a photometric follow-up by the brand new Characterising Exoplanets Satellite (CHEOPS). Here, we report that the outer planet d is also transiting, and measure its radius and mass to be 2.56 ± 0.09 R⊕ and 8.82 ± 0.94 M⊕, respectively. With its bright Sun-like star, long period and mild irradiation (∼5.7 times the irradiation of Earth), ν2 Lupi d unlocks a completely new region in the parameter space of exoplanets amenable to detailed characterization. We refine the properties of all three planets: planet b probably has a rocky mostly dry composition, while planets c and d seem to have retained small hydrogen-helium envelopes and a possibly large water fraction. This diversity of planetary compositions makes the ν2 Lupi system an excellent laboratory for testing formation and evolution models of low-mass planets.

Abstract Copyright: ©

Journal keyword(s): Astrophysics - Earth and Planetary Astrophysics

VizieR on-line data: <Available at CDS (J/other/NatAs/5.775): vis1raw.dat vis1det.dat vis2raw.dat vis2det.dat vis3raw.dat vis3det.dat vis4raw.dat vis4det.dat vis5raw.dat vis5det.dat vis6raw.dat vis6det.dat>

Simbad objects: 18

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