539 datasets found

We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine-learning tool, named SMDET, applied to time-series images from the Wide-field...

We present the discovery of TOI 762 A b and TIC 46432937 b, two giant planets transiting M-dwarf stars. Transits of both systems were first detected from observations by the...

TOI-677b is part of an emerging class of "tidally detached" gas giants (a/R*>~11) that exhibit large orbital eccentricities and yet low stellar obliquities. Such sources pose...

The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have...

We present the analysis of three more planets from the KMTNet 2021 microlensing season. KMT-2021-BLG-0119Lb is a ~6M_Jup_ planet orbiting an early M-dwarf or a K-dwarf,...

In this study, we performed a homogeneous analysis of the planets around FGK dwarf stars observed by the Kepler and K2 missions, providing spectroscopic parameters for 310 K2...

We present the discovery of 34 comoving systems containing an ultracool dwarf found by means of the NOIRLab Source Catalog (NSC) DR2. NSC's angular resolution of ~1" allows for...

We report individual dynamical masses of 66.92{+/-}0.36 MJup and 53.25{+/-}0.29MJup for the binary brown dwarfs {epsilon} Indi Ba and Bb, measured from long-term (~10yr)...

The evolution of magnetism in late-type dwarfs remains murky, as we can only weakly predict levels of activity for M dwarfs of a given mass and age. We report results from our...

The relative rarity of giant planets around low-mass stars compared with solar-type stars is a key prediction from the core-accretion planet formation theory. In this paper we...

Studies of close-in planets orbiting M dwarfs have suggested that the M-dwarf radius valley may be well explained by distinct formation timescales between enveloped terrestrials...

We present the results of a uniform search for additional planets around all stars with confirmed hot Jupiters observed by the Transiting Exoplanet Survey Satellite (TESS) in...

Using radial-velocity measurements from four instruments, we report the mass and density of a 2.043{+/-}0.069R{Earth} sub-Neptune orbiting the quiet K-dwarf Wolf503 (HIP67285)....

We report initial results of a large radial velocity survey of K dwarfs up to a distance of 50pc from the solar system, to look for stellar, brown dwarf, and Jovian planets...

We present an intensive effort to refine the mass and orbit of the enveloped terrestrial planet GJ1214b using 165 radial velocity (RV) measurements taken with the HARPS...

Since the launch of the Kepler space telescope in 2009 and the subsequent K2 mission, hundreds of multiplanet systems have been discovered. The study of such systems, both as...

We report the flare activity of Wolf359, the fifth closest star to the Sun and a candidate exoplanet-hosting M-dwarf. The star was a target of the Kepler/K2 mission and was...

We present the discovery of two planets orbiting the nearby (D=11.9pc) K7 dwarf Gl414A. Gl414Ab is a sub-Neptune mass planet with M_b_sini_b_=7.60_-2.19_^+2.44^M{Earth} and a...

Young exoplanets can offer insight into the evolution of planetary atmospheres, compositions, and architectures. We present the discovery of the young planetary system TOI-451...

We report the discovery by the ground-based Hungarian-made Automated Telescope Network (HATNet) survey of the transiting exoplanet HAT-P-68b, which has a mass of...