We present the first infrared ellipsoidal study of a low-mass X-ray binary system, and hence measure the mass of the neutron star. Photometry of Cen X-4...
An empirical approach to the location of the theoretical isochrones in the observational plane
A new empirical calibration of the (B-V) index versus the three fundamental stellar parameters T(eff), (Fe/H), and log g is presented whose range of validity is...
An empirical colour-T(eff) calibration for G and K dwarf and subdwarf stars
Infrared observations are used to obtain effective temperatures with a 3-percent error for a sample of low main-sequence stars. The empirical calibration of...
An Empirical Criterion to Classify T Tauri Stars and Substellar Analogs Using Low-Resolution Optical Spectroscopy
We have compiled and studied photometric and spectroscopic data published in the literature of several star-forming regions and young open clusters (Orion...
An Empirical Procedure to Estimate Distances to Stellar Clusters
A most desirable feature of a standard candle to estimate astronomical distances is robustness against changes in metallicity and age. It is argued that the...
An Empirical Relation between the Large-scale Magnetic Field and the Dynamical Mass in Galaxies
The origin and evolution of cosmic magnetic fields as well as the influence of the magnetic fields on the evolution of galaxies are unknown. Though not without...
An empirical, Bayesian approach to modelling crop yield: Maize in USA
We apply an empirical, data-driven approach for describing crop yield as a function of monthly temperature and precipitation by employing generative...
An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b
We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the Double Spectrograph...
An enquiry on the origins of N-rich stars in the inner Galaxy based on APOGEE chemical compositions
Recent evidence based on APOGEE data for stars within a few kpc of the Galactic Centre suggests that dissolved globular clusters (GCs) contribute significantly...