A proto-cluster of Lyα emitting galaxies, spectroscopically confirmed at redshift 6.5, produces a remarkable number of ionising continuum photons. We find that the sources in the proto-cluster are capable of ionising a large bubble, indeed larger than the volume occupied by the proto-cluster.

We present the results of a 4-month, spectroscopic campaign of the Wolf-Rayet dust-making binary, WR137. We detect only small-amplitude random variability in the C III λ5696 emission line and its integrated quantities (radial velocity, equivalent width, skewness, and kurtosis) that can be explained by stochastic clumps in the wind of the WC star

We report the discovery of a white dwarf exhibiting deep, irregularly shaped transits, indicative of circumstellar planetary debris. Using Zwicky Transient Facility DR2 photometry of ZTF J013906.17+524536.89 and follow-up observations from the Las Cumbres Observatory, we identify multiple transit events that recur every ≍107.2 days, much longer

We present our project to explore the stellar content of the nearest Milky Way massive star forming región, Cygnus-X. The main aim (but not the only one) is to understand the formation and evolution of single and multiple massive stars. Using the new WEAVE multifiber spectrograph attached to the 4.2-m WHT and within the SCIP survey we will secure

We report a trimodal behaviour of the spatial distribution of ionised gas within bars in the S 4G survey, in which star-forming bars are most common among late-type galaxies. We use archival GALEX far- and near-UV imaging for 772 barred galaxies and a compilation of 433 continuum-subtracted Hα images. We use both stacking techniques and visual

In this work we present a real-time pipeline for space debris studies in the IAC80 telescope. CCD images are reduced, satellite or space debris trails are detected and characterized, astrometric reduction is performed and a quality control is applied in order to reject outliers from the solutions. As a final product we obtain the equatorial