This paper examines the possibility of recovering quantitative information on chromospheric velocity fields from high resolution (lambda/Delta lambda of about...

The effect of stellar multiplicity on planetary architecture and orbital dynamics provides an important context for exoplanet demographics. We present a volume...

We report the spectroscopic detection of the secondary star in the x-ray transient QZ Vul (=GS 2000+25). Cross-correlation of individual spectra against K-type...

Effects of differential extinction across the Earth's atmosphere on astronomical photometry are reviewed. Under the same circumstances when a rotating extended...

The Mg II chromospheric emissions in cool stars were analyzed using high resolution IUE archive spectra. The ways in which interstellar (IS) absorptions can...

We present the discovery of 11 new transiting brown dwarfs (BDs) and low-mass M dwarfs from NASA's Transiting Exoplanet Survey Satellite (TESS) mission: TOI...

Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion—likely a white dwarf—belonging to the Draco dwarf...

We report the discovery and confirmation of TOI-4465 b, a 1.25R J ‑ 0.07 R J + 0.08 R J , 5.89M J ± 0.26M J giant planet orbiting a G dwarf star at d ≃ 122 pc...

Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up...