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Spectroscopic orbits of three K dwarf stars
The spectroscopic orbits of single-lined binary dwarfs HD 23439B, HD 237287 and HD 217580 are derived from the radial velocities measured with two correlation radial-velocity... -
Na, Mg, Ca abundances in K-type giants
Narrow-band photometric measures of the strengths of the Mg b, Ca triplet, and Na D lines on 312 G and K type giant stars have been analysed with a model atmosphere technique to... -
UBV K Stars South Galactic Pole
B and V photographic photometry is collected for approximately 2000 stars near the south galactic pole with 0.8<B-V<1.20; v<19.0, and B<20.06. Velocities with... -
Rotational velocities of K giant stars
We present the results of a search for unusually rapidly rotating giant stars in a large sample of K giants (~1300 stars) that had been spectroscopically monitored as potential... -
Radial velocity exploration of {epsilon} Eridani
We present the most sensitive direct imaging and radial velocity (RV) exploration of {epsilon} Eridani to date. {epsilon} Eridani is an adolescent planetary system, reminiscent... -
CFHT monitoring of M67 & members from Gaia EDR3
We present stellar rotation periods for late K- and early M-dwarf members of the 4Gyr old open cluster M67 as calibrators for gyrochronology and tests of stellar spin-down... -
Starspots's temperature and area in 337 KIC stars
Upcoming missions, including the James Webb Space Telescope, will soon characterize the atmospheres of terrestrial-type exoplanets in habitable zones around cool K- and M-type... -
Sloan iz light curves of HAT-P-10
We report on the discovery of HAT-P-10b, one of the lowest mass (0.487+/-0.018M_J_) transiting extrasolar planets (TEPs) discovered to date by transit searches. HAT-P-10b orbits... -
5-55000{AA} spectrum of TOI 560
We report helium absorption from the escaping atmosphere of TOI560.01 (HD73583b), an R=2.8R{Earth}, P=6.4day mini-Neptune orbiting a young (~600Myr) K-dwarf. Using Keck/NIRSPEC,... -
The TESS-Keck Survey. XI. TOI-1246 RVel
Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K-dwarf... -
K and M stars photometry
Broadband UBVRI photometry is presented for 687 stars from among the dwarf K and M stars found spectroscopically by Vyssotsky [1958AJ.....63..211V]. Of these, 211 are without... -
Chemical Evolution of Yb in Galactic Disc
Measuring the abundances of neutron-capture elements in Galactic disk stars is an important part of understanding key stellar and galactic processes. In the optical wavelength... -
Discovery of a resolved disk around Wray 15-788
Protoplanetary disks are the birth environments of planetary systems. Therefore, the study of young, circumstellar environments is essential to understanding the processes... -
K2-141 b radial velocity and light curve
We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7-hour orbit transiting an active K7 V star based on data from K2 campaign... -
K and G dwarfs stellar granulation variability
In solar-type stars, the attenuation of convective blueshift by stellar magnetic activity dominates the RV (radial velocity) variations over the low amplitude signal induced by... -
IRS calibration to IRAC: 61 IRS standard stars
We present 3.6 and 4.5{mu}m photometry for a set of 61 standard stars observed by Spitzer's Infrared Spectrograph (IRS). The photometry was obtained with the Infrared Array... -
Discovery of the directly imaged planet YSES 2b
To understand the origin and formation pathway of wide-orbit gas giant planets, it is necessary to expand the limited sample of these objects. The mass of exoplanets derived... -
2MASS J16042165-2130284 high-contrast images
The large cavities observed in the dust and gas distributions of transition disks may be explained by planet-disk interactions. At 145pc, 2MASS J16042165-2130284 (J1604) is a...
