Context. The thermal structure of the penumbra below its visible surface (i.e., τ5 ≥ 1) has important implications for our present understanding of sunspots and their penumbrae: their brightness and energy transport, mode conversion of magneto-acoustic waves, sunspot seismology, and so forth. Aims: We aim at determining the thermal stratification

Context. We present the results of a multi-year monitoring campaign of the Galactic center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports that a putative gas cloud (G2) would be passing in close proximity to the super-massive black hole (SMBH), associated with Sagittarius A*, located at the center of our

Pair production of Y(1S) mesons is observed at the LHC in proton-proton collisions at √{s}=8 TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 fb-1. Both Y(1S) candidates are fully reconstructed via their decays to μ + μ -. The fiducial acceptance region is defined by an absolute Y(1S) rapidity smaller

Context. About 20% of low-redshift galaxies are late-type spirals with a small or no bulge component. Although they are the simplest disk galaxies in terms of structure and dynamics, the role of the different physical processes driving their formation and evolution is not yet fully understood. Aims: We investigated whether small bulges of late-type

Measurements of strange hadron (KS0, Λ + Λ ‾, and Ξ- +Ξ‾+) transverse momentum spectra in pp, pPb, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pp collisions at √{ s} = 7TeV, pPb collisions at √{sNN} = 5.02TeV, and PbPb

Context. The evolution of massive stars surviving the red supergiant (RSG) stage remains unexplored due to the rarity of such objects. The yellow hypergiants (YHGs) appear to be the warm counterparts of post-RSG classes located near the Humphreys-Davidson upper luminosity limit, which are characterized by atmospheric instability and high mass-loss