We present and investigate the properties of a sample of radio-selected, Euclid-dark galaxies, identified from LOFAR HBA observations at 144 MHz within the Euclid Deep Field-North (EDF-N), covering approximately 10 deg 2. Starting from 1051 radio sources lacking optical counterparts down to a 5σ depth of 23.9 in the y band in previous surveys (but

Aims. In this paper we present cosmological parameter forecasts for the Euclid 6 × 2 pt statistics, which include the galaxy clustering and weak lensing main probes together with previously neglected cross-covariance and cross-correlation signals between imaging-photometric and spectroscopic data. The aim is understanding the impact of such cross

Aims. We performed a spectroscopic follow-up of the Lyα blob SHARDS20018464 using the infrared spectrograph Espectrógrafo Multiobjeto Infra-Rojo (EMIR) at the 10.4 m Gran Telescopio Canarias (GTC) telescope, equipped with its newly upgraded H2RG focal plane array detector. Methods. We observed the blob in the Ks band, which corresponds, at the

Context. The Parker Solar Probe (PSP) mission revealed the ubiquity of switchbacks (SBs), i.e. sharp and localised magnetic deflections, in the nascent solar wind. This finding has sparked significant interest in their origin and formation mechanisms. Among the proposed scenarios, a solar origin associated with solar jets has emerged. Solar jets

Context. Ultra-diffuse galaxies (UDGs) in the field, gravitationally isolated from galaxy clusters, are faint systems that remain poorly represented in the literature due to lack of spectroscopic confirmation and the difficulty of obtaining high signal-to-noise emission-line measurements. Aims. We present a spectroscopic study of 17 blue UDG