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We report the spectroscopic confirmation and fundamental properties of TOI-757 b, a mini-Neptune on a 17.5-day orbit transiting a bright star ($V = 9.7$ mag) discovered by the TESS mission. We acquired high-precision radial velocity…

Earth and Planetary Astrophysics · Physics 2024-07-31 A. Alqasim , N. Grieves , N. M. Rosário , D. Gandolfi , J. H. Livingston , S. Sousa , K. A. Collins , J. K. Teske , M. Fridlund , J. A. Egger , J. Cabrera , C. Hellier , A. F. Lanza , V. Van Eylen , F. Bouchy , R. J. Oelkers , G. Srdoc , S. Shectman , M. Günther , E. Goffo , T. Wilson , L. M. Serrano , A. Brandeker , S. X. Wang , A. Heitzmann , A. Bonfanti , L. Fossati , Y. Alibert , L. Delrez , R. Sefako , S. Barros , K. I. Collins , O. D. S. Demangeon , S. H. Albrecht , R. Alonso , J. Asquier , T. Barczy , D. Barrado , W. Baumjohann , T. Beck , W. Benz , N. Billot , L. Borsato , C. Broeg , E. M. Bryant , R. P. Butler , W. D. Cochran , A. Collier Cameron , A. C. M. Correia , J. D. Crane , Sz. Csizmadia , P. E. Cubillos , M. B. Davies , T. Daylan , M. Deleuil , A. Deline , B. -O. Demory , A. Derekas , B. Edwards , D. Ehrenreich , A. Erikson , Z. Essack , A. Fortier , K. Gazeas , M. Gillon , M. Gudel , J. Hasiba , A. P. Hatzes , Ch. Helling , T. Hirano , S. B. Howell , S. Hoyer , K. G. Isaak , J. M. Jenkins , S. Kanodia , L. L. Kiss , J. Korth , K. W. F. Lam , J. Laskar , A. Lecavelier des Etangs , M. Lendl , M. B. Lund , R. Luque , A. W. Mann , D. Magrin , P. F. L. Maxted , C. Mordasini , N. Narita , V. Nascimbeni , G. Nowak , G. Olofsson , H. P. Osborn , H. L. M. Osborne , D. Osip , R. Ottensamer , I. Pagano , E. Palle , G. Peter , G. Piotto , D. Pollacco , D. Queloz , R. Ragazzoni , N. Rando , H. Rauer , S. Redfield , I. Ribas , M. Rice , G. R. Ricker , M. Rieder , S. Salmon , N. C. Santos , G. Scandariato , S. Seager , D. Segransan , A. Shporer , A. E. Simon , A. M. S. Smith , M. Stalport , Gy. M. Szabo , I. Thompson , J. D. Twicken , S. Udry , R. Vanderspek , V. Van Grootel , J. Venturini , E. Villaver , J. Villaseñor , V. Viotto , I. Walter , N. A. Walton , J. N. Winn , S. W. Yee

We are conducting a planet search survey with HARPS since seven years. The volume-limited stellar sample includes all F2 to M0 main-sequence stars within 57.5 pc, where extrasolar planetary signatures are systematically searched for with…

Earth and Planetary Astrophysics · Physics 2015-05-20 C. Moutou , M. Mayor , G. Lo Curto , D. Segransan , S. Udry , F. Bouchy , W. Benz , C. Lovis , D. Naef , F. Pepe , D. Queloz , N. C. Santos , S. Sousa

The system of two transiting Neptune-sized planets around the bright, young M-dwarf AU Mic provides a unique opportunity to test models of planet formation, early evolution, and star-planet interaction. However, the intense magnetic…

The TOI-421 planetary system contains two sub-Neptune-type planets and is a prime target to study the formation and evolution of planets and their atmospheres. The inner planet is especially interesting as the existence of a…

Exoplanet mass and radius inferences fundamentally rely on host star mass and radius inferences. Despite the importance of host star mass, radius, and elemental abundance inferences for the derivation of exoplanet internal structure…

Earth and Planetary Astrophysics · Physics 2025-08-25 Alejandra Ross , Henrique Reggiani , Kevin C. Schlaufman , Mykhaylo Plotnykov , Diana Valencia

Context: Rocky planets on ultra-short period orbits can have surface magma oceans and rock-vapour atmospheres in which dust can condense. Observations of that dust can inform about the composition surface conditions on these objects. Aims:…

Earth and Planetary Astrophysics · Physics 2024-08-28 E. Gaidos , H. Parviainen , E. Esparza-Borges , A. Fukui , K. Isogai , K. Kawauchi , J. de Leon , M. Mori , F. Murgas , N. Narita , E. Palle , N. Watanabe

The Transiting Exoplanet Survey Satellite (TESS) provides a continuous suite of new planet candidates that need confirmation and precise mass determination from ground-based observatories. This is the case for the G-type star TOI-1710,…

Eclipsing binaries are important benchmark objects to test and calibrate stellar structure and evolution models. This is especially true for binaries with a fully convective M-dwarf component for which direct measurements of these stars'…

Photometric survey data from the Kepler mission have been used to discover and characterize thousands of transiting exoplanet and eclipsing binary (EB) systems. These discoveries have enabled empirical studies of occurrence rates which…

Earth and Planetary Astrophysics · Physics 2018-02-21 Daryll M. LaCourse , Thomas L. Jacobs

The NASA TESS mission has discovered many transiting planets orbiting bright nearby stars, and high-resolution imaging studies have revealed that a number of these exoplanet hosts reside in binary or multiple star systems. In such systems,…

Solar and Stellar Astrophysics · Physics 2022-07-27 Kathryn Lester , Steve Howell , David Ciardi , Rachel Matson

We present ground and space-based photometric observations of TOI-270 (L231-32), a system of three transiting planets consisting of one super-Earth and two sub-Neptunes discovered by TESS around a bright (K-mag=8.25) M3V dwarf. The planets…

The masses and radii of extrasolar planets are key observables for understanding their interior, formation and evolution. While transit photometry and Doppler spectroscopy are used to measure the radii and masses respectively of planets…

Earth and Planetary Astrophysics · Physics 2015-09-16 J. M. Almenara , R. F. Díaz , R. Mardling , S. C. C. Barros , C. Damiani , G. Bruno , X. Bonfils , M. Deleuil

The technique of transmission spectroscopy allows us to constrain the chemical composition of the atmospheres of transiting exoplanets. It relies on very high signal-to-noise spectroscopic (or spectrophotometric) observations and is thus…

Earth and Planetary Astrophysics · Physics 2019-09-04 Jiri Zak , Petr Kabath , Henri M. J. Boffin , Valentin D. Ivanov , Marek Skarka

Hot Jupiters are giant planets subject to intense stellar radiation. The physical and chemical properties of their atmosphere makes them the most amenable targets for the atmospheric characterization. In this paper we analyze the photometry…

For small planets orbiting within the habitable zones of their host stars, multicolour validation via photometric transit observations offers an efficient alternative to prioritize targets before intensive radial-velocity follow-up, thereby…