A giant star-forming region in a metal-poor dwarf galaxy has been observed in optical lines with the 10 m Gran Telescopio Canarias (GTC) and in the emission line of CO(1–0) with the Northern Extended Millimeter Array (NOEMA) mm-wave interferometer. The metallicity was determined to be 12+{log}({{O}}/{{H}})=7.83+/- 0.09, from which we estimate a

The split main sequences (MSs) and extended MS turnoffs (eMSTOs) detected in a few young clusters have demonstrated that these stellar systems host multiple populations differing in a number of properties such as rotation and, possibly, age. We analyse Hubble Space Telescope photometry for 13 clusters with ages between ˜40 and ˜1000 Myr and of

We present our preliminary light curves for Cepheid targets with the aim to check the possible period and color index variation of the stars.

Measurements of differential t\overline{t} production cross sections are presented in the single-lepton decay channel, as a function of a number of kinematic event variables. The measurements are performed with proton-proton collision data at √{s}=13 TeV, collected by the CMS experiment at the LHC during 2016, with an integrated luminosity of 35.9

The nuclear modification factors of {J/ψ } and ψ {(2S)} mesons are measured in {PbPb} collisions at a centre-of-mass energy per nucleon pair of √{[b]{s_{_{ {NN}}}}} = 5.02 {Te} {V} . The analysis is based on {PbPb} and pp data samples collected by CMS at the LHC in 2015, corresponding to integrated luminosities of 464 μ b^{-1} and 28 {pb}^ {-1}

Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at √{s }=13 TeV are measured as a function of kinematic variables of the top quarks and the top quark-antiquark (t t ¯) system. In addition, kinematic variables and multiplicities of jets associated with the t t ¯ production are