Local extremely metal-poor galaxies (XMPs) are of particular astrophysical interest since they allow us to look into physical processes characteristic of the early universe, from the assembly of galaxy disks to the formation of stars in conditions of low metallicity. Given the luminosity–metallicity relationship, all galaxies fainter than M r ≃ ‑13

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. Our objectives are to improve our knowledge of metal-poor low-mass dwarfs, bridge the gap between the late-M and L types, determine their surface density, and understand the impact of

The transverse momentum spectra of weak vector bosons are measured in the CMS experiment at the LHC. The measurement uses a sample of proton-proton collisions at √{s}=8 TeV, collected during a special low-luminosity running that corresponds to an integrated luminosity of 18 .4 ± 0 .5 pb-1. The production of W bosons is studied in both electron and

The production cross section of a W boson in association with two b jets is measured using a sample of proton-proton collisions at √{s} = 8{ {TeV}} collected by the CMS experiment at the CERN LHC. The data sample corresponds to an integrated luminosity of 19.8 {fb}^ {-1}. The W bosons are reconstructed via their leptonic decays, W→ ℓ ν , where ℓ =μ

The idea that dark matter can be made of intermediate-mass primordial black holes (PBHs) in the 10 M ⊙ ≲ M ≲ 200 M ⊙ range has recently been reconsidered, particularly in the light of the detection of gravitational waves by the LIGO experiment. The existence of even a small fraction of dark matter in black holes should nevertheless result in

We have used Spitzer images of a sample of 68 barred spiral galaxies in the local universe to make systematic measurements of bar length and bar strength. We combine these with precise determinations of the corotation radii associated with the bars, taken from our previous study, which used the phase change from radial inflow to radial outflow of