Our understanding of the properties and demographics of exoplanets critically relies on our
ability to determine the fundamental properties of their host stars. The advent of Gaia and …

In order to accurately determine stellar properties, knowledge of the effective temperature of
stars is vital. We implement Gaia and 2MASS photometry in the InfraRed Flux Method and …

We present direct radii measurements of the well-known transiting exoplanet host stars HD
189733 and HD 209458 using the CHARA Array interferometer. We find the limb-darkened …

The most powerful tests of stellar models come from the brightest stars in the sky, for which
complementary techniques, such as astrometry, asteroseismology, spectroscopy and …

The diameter of a star is a major observable that serves to test the validity of stellar structure
theories. It is also a difficult observable that is mostly obtained with indirect methods since …

Context. Benchmark stars are crucial as validating standards for current as well as future
large stellar surveys of the Milky Way. However, the number of suitable metal-poor …

Context. An extremely weak circularly polarized signature was recently discovered in
spectral lines of the chemically peculiar Am star Sirius A. A weak surface magnetic field was …

We present empirical metallicity-dependent calibrations of effective temperature against
colours for dwarfs of luminosity classes IV and V and for giants of luminosity classes II and III …

Large stellar surveys of the Milky Way require validation with reference to a set of
'benchmark'stars whose fundamental properties are well determined. For metal-poor …

Determining the physical properties of microlensing events depends on having accurate
angular sizes of the source star. Using long baseline optical interferometry, we are able to …