New spin period determination for comet 6P/d'Arrest
A lightcurve of comet 6P/d'Arrest from R-band CCD images taken at La Palma 2.52 m NOT telescope is presented. The lightcurve shows noticeable periodic changes...
New Teff and [Fe/H] spectroscopic calibration for FGK dwarfs and GK giants
Context. The ever-growing number of large spectroscopic survey programs has increased the importance of fast and reliable methods with which to determine...
New Theoretical Period-Luminosity-Metallicity Relations for RR Lyrae in the Rubin-LSST Filters
The revolutionary power of future Rubin-LSST observations will allow us to significantly improve the physics of pulsating stars, including RR Lyrae. In this...
New Times of Minima of Eclipsing Binary Systems and of Maximum of SXPHE Type Stars
We present 64 photoelectric minima observations of 31 eclipsing binaries. We also report three new times of maxima of three SXPHE type pulsating stars.
New ultra metal-poor stars from SDSS: follow-up GTC medium-resolution spectroscopy
Context. The first generation of stars formed in the Galaxy left behind the chemical signatures of their nucleosynthesis in the interstellar medium, visible...
New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools
Aims: We aim to develop an efficient method to search for late-type subdwarfs (metal-depleted dwarfs with spectral types ≥M5) to improve the current statistics...
New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools. I. UKIDSS LAS DR5 vs. SDSS DR7
Aims: The aim of the project is to improve our knowledge of the low-mass and low-metallicity population to investigate the influence of metallicity on the...