We report the discovery of a detached 20-min orbital period binary white dwarf (WD). WD 0931+444 (SDSS J093506.93+441106.9) was previously classified as a WD +...
A new implementation of the infrared flux method using the 2MASS catalogue
Context: The effective temperature scale of FGK stars, especially at the lowest metallicities remains a major problem in the chemical abundance analysis of...
A new L dwarf member of the moderately metal poor triple system HD 221356
We report on the discovery of a fourth component in the HD 221356 star system, previously known to be formed by an F8V, a slightly metal poor primary ([Fe/H] =...
A new L5 brown dwarf member of the Hyades cluster with chromospheric activity
Aims: Our aim is to identify brown dwarf members of the nearby Hyades open star cluster to determine the photometric and spectroscopic properties of brown...
A new line list for the A2Σ+ -X2 Π electronic transition of OH
A new line list for the A2Σ+ -X2 Π electronic transition of OH has been calculated. Line positions have been taken from the literature and refitted with Western...
A new linelist for the A3Π-X3Σ- transition of the NH free radical
A new linelist for the A3Π-X3Σ- electronic transition of NH has been prepared using line positions from the literature and calculated line intensities. High...
A new look inside planetary nebula LoTr 5: a long-period binary with hints of a possible third component
LoTr 5 is a planetary nebula with an unusual long-period binary central star. As far as we know, the pair consists of a rapidly rotating G-type star and a hot...
A New Method Based on Artificial Neural Network Techniques for Determining the Fraction of Binaries in Star Clusters
We present a new method based on artificial neural networks techniques aimed at determining the fraction of binary systems populating star clusters. We address...
A new method for age-dating the formation of bars in disc galaxies. The TIMER view on NGC1433's old bar and the inside-out growth of its nuclear disc
The epoch in which galactic discs settle is a major benchmark for testing models of galaxy formation and evolution but remains largely unknown. Once discs...