208 datasets found

We present a high-resolution spectrum of a microlensed G dwarf in the Galactic bulge with spectroscopic temperature T_eff_=5600+/-180K. This I~21mag star was magnified by a...

We present precision radial velocity data that reveal a multiple exoplanet system orbiting the bright nearby G5V star 61 Virginis. Our 4.6 years of combined Keck/HIRES and...

We have observed 152 nearby solar-type stars with the Infrared Spectrometer (IRS) on the Spitzer Space Telescope. Including stars that met our criteria but were observed in...

While the strong anticorrelation between chromospheric activity and age has led to the common use of the CaII H and K emission index (R'HK=L_HK_/L_bol_) as an empirical age...

We demonstrate an approach to determine spectral energy distribution (SED) templates that are accurate to the 1% level from the visible through the infrared for nearby...

Understanding when and how circumstellar disks disperse is crucial to constrain planet formation and migration. Thermal winds powered by high-energy stellar photons have long...

We report the confirmation of a TESS-discovered transiting super-Earth planet orbiting a mid-G star, HD307842 (TOI-784). The planet has a period of 2.8days, and the radial...

We present the discovery of TOI-1420b, an exceptionally low-density ({rho}=0.08{+/-}0.02g/cm^3^) transiting planet in a P=6.96days orbit around a late G-dwarf star. Using...

To accurately characterize the planets a star may be hosting, stellar parameters must first be well determined. {tau}Ceti is a nearby solar analog and often a target for...

Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMRs). Dynamical evolution over time...

We perform transit timing variation (TTV) and transmission spectroscopy analyses of the planet HAT-P-37b, which is a hot Jupiter orbiting a G-type star. Nine new transit light...

We detect Ly{alpha} absorption from the escaping atmosphere of HD63433c, a R=2.67R{Earth}, P=20.5day mini-Neptune orbiting a young (440Myr) solar analog in the Ursa Major Moving...

We report the discovery of TOI-2180b, a 2.8M_J_ giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting...

We present mass and radius measurements of K2-79b and K2-222b, two transiting exoplanets orbiting active G-type stars observed with HARPS-N and K2. Their respective 10.99day and...

We present an independent Doppler validation and dynamical orbital analysis of the two-planet system HD107148, which was recently announced in Rosenthal et al. Our detailed...

We present five decades of chromospheric activity measurements in 59 Sun-like stars as time series. These include and extend the 35yr of stellar chromospheric activity...

Kepler1627A is a G8V star previously known to host a 3.8R{Earth} planet on a 7.2day orbit. The star was observed by the Kepler space telescope because it is nearby (d=329pc) and...

Exoplanet systems with multiple transiting planets are natural laboratories for testing planetary astrophysics. One such system is HD191939 (TOI1339), a bright (V=9) and...

We present the discovery of Kepler-129d (P_d_=7.2_-0.3_^+0.4^yr, m_sini_d__=8.3_-0.7_^+1.1^M_Jup_, e_d_=0.15_-0.05_^+0.07^) based on six years of radial-velocity observations...

We present the discovery of two nearly identically sized sub-Neptune transiting planets orbiting HD63935, a bright (V=8.6mag), Sun-like (Teff=5560K) star at 49pc. TESS...