381 datasets found

Stellar multiplicity is correlated with many stellar properties, yet multiplicity measurements have proven difficult for the M-dwarfs the most common type of star in our...

The nearby LHS-1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history....

M-dwarfs are ubiquitous in our Galaxy, and the rate at which they host stellar companions, and the properties of these companions, provide a window into the formation and...

Spectra of young benchmark brown dwarfs with well-known ages are vital to characterize other brown dwarfs, for which ages are in general not known. These spectra are also...

TOI-1899b is a rare exoplanet, a temperate warm Jupiter orbiting an M-dwarf, first discovered by Canas et al. (2020) from a TESS single-transit event. Using new radial...

Since identifying the gap in the H-R Diagram (HRD) marking the transition between partially and fully-convective interiors, a unique type of slowly pulsating M-dwarf has been...

Wolf-359 (CN-Leo, GJ-406, Gaia-DR3-3864972938605115520) is a low-mass star in the fifth-closest neighboring system (2.41pc). Because of its relative youth and proximity,...

We present results from the volume-complete spectroscopic survey of 0.1-0.3M{sun} M-dwarfs within 15pc. This work discusses the active sample without close binary companions,...

Cold Jovian planets play an important role in sculpting the dynamical environment in which inner terrestrial planets form. The core accretion model predicts that giant planets...

We present high-precision radial velocities (RVels) from the HARPS-N spectrograph for HD79210 and HD79211, two M0V members of a gravitationally bound binary system. We detect a...

Molecular oxygen is a strong indicator of life on Earth and may indicate biological processes on exoplanets too. Recent studies proposed that Earth-like O2 levels might be...

Characterizing the bulk compositions of transiting exoplanets within the M-dwarf radius valley offers a unique means to establish whether the radius valley emerges from an...

We present the discovery of TOI-5205b, a transiting Jovian planet orbiting a solar metallicity M4V star, which was discovered using Transiting Exoplanet Survey Satellite...

We obtained ultraviolet and optical spectra for nine M-dwarfs across a range of rotation periods to determine whether they showed stochastic intrinsic variability...

Exploring the properties of exoplanets near or inside the radius valley provides insight on the transition from the rocky super-Earths to the larger, hydrogen-rich atmosphere...

We present the discovery of a new Jovian-sized planet, TOI-3757b, the lowest-density transiting planet known to orbit an M dwarf (M0V). This planet was discovered around a...

Orbiting an M dwarf 12pc away, the transiting exoplanet GJ1132b is a prime target for transmission spectroscopy. With a mass of 1.7M{Earth} and radius of 1.1R{Earth}, GJ1132b's...

Stellar variability is a limiting factor for planet detection and characterization, particularly around active M-type stars. Here we revisit one of the most active stars from...

High-energy X-ray and ultraviolet (UV) radiation from young stars impacts planetary atmospheric chemistry and mass loss. The active ~22Myr M-dwarf AU-Mic hosts two exoplanets...

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...