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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 13567naa a2201969 4500 | |
| 001 | oai:research.chalmers.se:288ab240-79b9-427e-920f-00b4b75cf7a2 | |
| 003 | SwePub | |
| 008 | 240515s2024 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/5411402 URI |
| 024 | 7 | a https://doi.org/10.1051/0004-6361/2023486782 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Psaridi, A.u Université de Genève,University of Geneva4 aut |
| 245 | 1 0 | a Discovery of two warm mini-Neptunes with contrasting densities orbiting the young K3V star TOI-815 |
| 264 | 1 | c 2024 |
| 338 | a electronic2 rdacarrier | |
| 520 | a We present the discovery and characterization of two warm mini-Neptunes transiting the K3V star TOI-815 in a K–M binary system. Analysis of its spectra and rotation period reveal the star to be young, with an age of 200+−400200 Myr. TOI-815b has a 11.2-day period and a radius of 2.94 ± 0.05 R+ with transits observed by TESS, CHEOPS, ASTEP, and LCOGT. The outer planet, TOI-815c, has a radius of 2.62 ± 0.10 R+, based on observations of three nonconsecutive transits with TESS; targeted CHEOPS photometry and radial velocity follow-up with ESPRESSO were required to confirm the 35-day period. ESPRESSO confirmed the planetary nature of both planets and measured masses of 7.6 ± 1.5 M+ (ρP = 1.64+−003331 g cm−3) and 23.5 ± 2.4 M+ (ρP = 7.2+−1110 g cm−3), respectively. Thus, the planets have very different masses, which is unusual for compact multi-planet systems. Moreover, our statistical analysis of mini-Neptunes orbiting FGK stars suggests that weakly irradiated planets tend to have higher bulk densities compared to those undergoing strong irradiation. This could be ascribed to their cooler atmospheres, which are more compressed and denser. Internal structure modeling of TOI-815b suggests it likely has a H-He atmosphere that constitutes a few percent of the total planet mass, or higher if the planet is assumed to have no water. In contrast, the measured mass and radius of TOI-815c can be explained without invoking any atmosphere, challenging planetary formation theories. Finally, we infer from our measurements that the star is viewed close to pole-on, which implies a spin-orbit misalignment at the 3σ level. This emphasizes the peculiarity of the system’s orbital architecture, and probably hints at an eventful dynamical history. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a techniques: radial velocities | |
| 653 | a techniques: photometric | |
| 653 | a planets and satellites: composition | |
| 653 | a stars: individual: TOI-815 | |
| 653 | a planets and satellites: detection | |
| 653 | a planets and satellites: formation | |
| 700 | 1 | a Osborn, H. P.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Bouchy, F.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Lendl, M.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Parc, Lénau Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Billot, N.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Broeg, C.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Sousa, S.G.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Adibekyan, V.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Attia, Omaru Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Bonfanti, A.4 aut |
| 700 | 1 | a Chakraborty, Hritamu Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Collins, Karen A.u Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a Davoult, Jeanneu Universität Bern,University of Bern4 aut |
| 700 | 1 | a Delgado Mena, E.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Grieves, N.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Guillot, T.u Observatoire de la Cote d'Azur4 aut |
| 700 | 1 | a Heitzmann, A.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Helled, R.u Universität Zürich,University of Zürich4 aut |
| 700 | 1 | a Hellier, Coelu Keele University4 aut |
| 700 | 1 | a Jenkins, Jon M.u NASA Ames Research Center4 aut |
| 700 | 1 | a Knierim, Henriku Universität Zürich,University of Zürich4 aut |
| 700 | 1 | a Krenn, A.4 aut |
| 700 | 1 | a Lissauer, Jack J.u NASA Ames Research Center4 aut |
| 700 | 1 | a Luque, R.u University of Chicago4 aut |
| 700 | 1 | a Rapetti, D.u NASA Ames Research Center4 aut |
| 700 | 1 | a Santos, N. C.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Suárez, Olgau Observatoire de la Cote d'Azur4 aut |
| 700 | 1 | a Venturini, J.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Wilkin, Francis P.4 aut |
| 700 | 1 | a Wilson, T.G.u The University of Warwick4 aut |
| 700 | 1 | a Winn, J. N.u Princeton University4 aut |
| 700 | 1 | a Ziegler, C.u Stephen F. Austin State University4 aut |
| 700 | 1 | a Zingales, Tizianou Università Degli Studi di Padova,University of Padua4 aut |
| 700 | 1 | a Alibert, Y.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Brandeker, A.u Stockholms universitet,Stockholm University4 aut |
| 700 | 1 | a Egger, J. A.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Gandolfi, D.u Universita degli Studi di Torino,University of Turin4 aut |
| 700 | 1 | a Hooton, M.J.u University Of Cambridge4 aut |
| 700 | 1 | a Tuson, A.u University Of Cambridge4 aut |
| 700 | 1 | a Ulmer-Moll, S.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Abe, L.u Observatoire de la Cote d'Azur4 aut |
| 700 | 1 | a Allart, R.u Université de Montréal4 aut |
| 700 | 1 | a Alonso, R.u Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Anderson, D.u The University of Warwick4 aut |
| 700 | 1 | a Escudé, G. A.u Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC4 aut |
| 700 | 1 | a Bárczy, T.4 aut |
| 700 | 1 | a Barrado, D.u Centro de Astrobiologia (CAB)4 aut |
| 700 | 1 | a Barros, S.C.C.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Baumjohann, W.4 aut |
| 700 | 1 | a Beck, M.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Beck, T.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Benz, W.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Bonfils, X.4 aut |
| 700 | 1 | a Borsato, L.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Bourrier, V.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Ciardi, D. R.u California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Collier Cameron, A.u University of St Andrews4 aut |
| 700 | 1 | a Charnoz, S.u Institut de Physique du Globe de Paris4 aut |
| 700 | 1 | a Cointepas, M.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Csizmadia, Szilardu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Cubillos, P. E.4 aut |
| 700 | 1 | a Curto, G. Lou European Southern Observatory Santiago4 aut |
| 700 | 1 | a Davies, M. B.u Lunds universitet,Lund University4 aut |
| 700 | 1 | a Daylan, Tansuu Washington University in St. Louis4 aut |
| 700 | 1 | a Deleuil, M.u Laboratoire d'Astrophysique de Marseille4 aut |
| 700 | 1 | a Deline, A.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Delrez, L.u Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Demangeon, O.u Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Demory, B.O.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Dorn, C.u Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)4 aut |
| 700 | 1 | a Dumusque, X.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Ehrenreich, D.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Erikson, Andersu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a des Etangs, A. L.u Institut d 'Astrophysique de Paris4 aut |
| 700 | 1 | a de Miguel, D.u Airbus Group,Airbus Group Ltd4 aut |
| 700 | 1 | a Fortier, A.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Fossati, L.4 aut |
| 700 | 1 | a Frensch, Yolanda G.C.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Fridlund, Malcolm,d 1952u Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)4 aut0 (Swepub:cth)malfri |
| 700 | 1 | a Gillon, Michaëlu Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Gudel, M.u Universität Wien,University of Vienna4 aut |
| 700 | 1 | a Günther, Maximilian N.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Hagelberg, J.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Helling, Ch.4 aut |
| 700 | 1 | a Hoyer, S.u Laboratoire d'Astrophysique de Marseille4 aut |
| 700 | 1 | a Isaak, K.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Kiss, L. L.u Magyar Tudomanyos Akademia,Hungarian Academy of Sciences4 aut |
| 700 | 1 | a Lam, K. W.F.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Laskar, J.u Observatoire de Paris,Paris Observatory4 aut |
| 700 | 1 | a Lavie, B.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Lovis, C.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Magrin, D.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Marafatto, L.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Maxted, P.u Keele University4 aut |
| 700 | 1 | a McDermott, S.4 aut |
| 700 | 1 | a Mékarnia, Djamelu Observatoire de la Cote d'Azur4 aut |
| 700 | 1 | a Mordasini, C.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Murgas, F.u Universidad de la Laguna,University of La Laguna4 aut |
| 700 | 1 | a Nascimbeni, Valeriou Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Nielsen, L. D.u European Southern Observatory (ESO)4 aut |
| 700 | 1 | a Olofsson, G.u Stockholms universitet,Stockholm University4 aut |
| 700 | 1 | a Ottensamer, R.u Universität Wien,University of Vienna4 aut |
| 700 | 1 | a Pagano, I.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Palle, Enricu Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Peter, G.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Piotto, Giampaolo P.u Università Degli Studi di Padova,University of Padua4 aut |
| 700 | 1 | a Pollacco, Don L.u The University of Warwick4 aut |
| 700 | 1 | a Queloz, D.u University Of Cambridge4 aut |
| 700 | 1 | a Ragazzoni, Robertou Università Degli Studi di Padova,University of Padua4 aut |
| 700 | 1 | a Ramos, Devin4 aut |
| 700 | 1 | a Rando, N.u European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Rauer, H.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Reimers, C.u Universität Wien,University of Vienna4 aut |
| 700 | 1 | a Ribas, I.u Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC4 aut |
| 700 | 1 | a Seager, S.u Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Segransan, D.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Scandariato, Gaetanou Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Simon, A.E.u Universität Bern,University of Bern4 aut |
| 700 | 1 | a Smith, A. M.S.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Stalport, M.u Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Steller, Manfred B.4 aut |
| 700 | 1 | a Szabó, G.M.u Eötvös Loránd University (ELTE)4 aut |
| 700 | 1 | a Thomas, Nicolasu Universität Bern,University of Bern4 aut |
| 700 | 1 | a Pritchard, T.u NASA Goddard Space Flight Center4 aut |
| 700 | 1 | a Udry, S.u Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Van Damme, C. Corralu European Space Research and Technology Centre (ESA ESTEC)4 aut |
| 700 | 1 | a Van Grootel, V.u Universite de Liège,University of Liège4 aut |
| 700 | 1 | a Villaver, E.u Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Walter, I.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Walton, N. A.u University Of Cambridge4 aut |
| 700 | 1 | a Watkins, Cristilyn N.u Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a West, Richard Gu The University of Warwick4 aut |
| 710 | 2 | a Université de Genèveb Universität Bern4 org |
| 773 | 0 | t Astronomy and Astrophysicsg 685q 685x 0004-6361x 1432-0746 |
| 856 | 4 | u https://research.chalmers.se/publication/541140/file/541140_Fulltext.pdfx primaryx freey FULLTEXT |
| 856 | 4 8 | u https://research.chalmers.se/publication/541140 |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361/202348678 |
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