Sub-Neptunes with planetary radii of R p ≃ 2─4 R ⊕ are the most common planets around solar-type stars in short-period (P < 100 d) orbits. It is still unclear, however, what their most likely composition is, that is whether they are predominantly gas dwarfs or water worlds. The sub-Neptunes orbiting bright host stars are very valuable because they

Context. The Javalambre VARiability survey (J-VAR) is a multi-filter photometric survey conducted at the Observatorio Astrofísico de Javalambre, covering selected regions of the northern sky, and providing time-domain information for the Javalambre Photometric Local Universe Survey (J-PLUS) fields. J-VAR primarily focuses on small bodies of the

We analyse a sample of 225 star-forming regions from the DESIRED-E project, each with simultaneous determinations of the electron temperature from ionized nitrogen and oxygen, $T_{\rm e}$([N II]) and $T_{\rm e}$([O III]), respectively. We derive new empirical relations connecting the gas-phase metallicity to the global electron temperature, $T_{\rm

It has been 10 yr since the initial discovery of 'Ultra-Diffuse Galaxies' (UDGs) in the Coma cluster and the revelation that large, low surface brightness galaxies may constitute a greater fraction of galaxies than first thought. This left an open question: Are UDGs something special, or just an extension of the previously known dwarf galaxy

We utilize multiepoch line-of-sight velocity measurements from the Milky Way Survey of the Dark Energy Spectroscopic Instrument to estimate the binary fraction for member stars in the dwarf spheroidal galaxy Ursa Minor (UMi). Our dataset comprises 670 distinct member stars, with a total of more than 2000 observations collected over approximately

Binaries in which both stars are pulsating are rare but extremely valuable. We present the first study of an asteroseismic binary system consisting of a core helium-burning red clump (RC) star and a red giant branch (RGB) star. The Kepler target KIC 10841730 is a wide binary (period $2917 \pm 8$ d) that provides ideal conditions to test the