T-Lyr1-17236: A Long-Period Low-Mass Eclipsing Binary
We describe the discovery of a 0.68+0.52 Msolar eclipsing binary (EB) with an 8.4 day orbital period, found through a systematic search of 10 fields of the...
The Dark Energy Spectroscopic Instrument (DESI) survey will measure large-scale structures using quasars as direct tracers of dark matter in the redshift range...
Temperature Bias and the Primordial Helium Abundance Determination
We study the effect that the temperature structure has on the determination of the primordial helium abundance, Yp. We provide an equation linking T(O III), the...
Temperature Structure and Metallicity in H II Regions
The metallicities implied by collisionally excited lines (CELs) of heavy elements in H II regions are systematically lower than those implied by recombination...
Temporal Evolution of Fine Structures in and around Solar Pores
Time series of high-resolution white-light images of six solar pores, observed in 1993 and 1995 at the Swedish Vacuum Solar Telescope (La Palma), are analyzed...
Temporal Evolution of the Scattering Polarization of the Ca II IR Triplet in Hydrodynamical Models of the Solar Chromosphere
Velocity gradients in a stellar atmospheric plasma have an effect on the anisotropy of the radiation field that illuminates each point within the medium, and...
TESS Asteroseismic Analysis of HD 76920: The Giant Star Hosting an Extremely Eccentric Exoplanet
The Transiting Exoplanet Survey Satellite (TESS) mission searches for new exoplanets. The observing strategy of TESS results in high-precision photometry of...
TESS Asteroseismology of the Known Red-giant Host Stars HD 212771 and HD 203949
The Transiting Exoplanet Survey Satellite (TESS) is performing a near all-sky survey for planets that transit bright stars. In addition, its excellent...
TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion
Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler...