Institut d’Astrophysique Spatiale

Oct 7, 2024 | academic.oup.com | Space Exploration |Institut d’Astrophysique Spatiale

The detection of the redshifted 21 cm emission line from neutral Hydrogen during the Epoch of Reionization (EoR) is one of the main goals of (current and upcoming) low-frequency radio telescopes such as the Low Frequency Array (LOFAR; van Haarlem et al. 2013), the Murchison Widefield Array (MWA; Tingay et al. 2013), the Giant Metrewave Radio Telescope EoR experiment (GMRT; Paciga et al. 2013), the Hydrogen Epoch of Reionization Array (HERA; DeBoer et al.

Feb 16, 2024 | academic.oup.com | Institut d’Astrophysique Spatiale

The Epoch of Reionization (EoR) is a large-scale phase transition during which the Universe transitioned from a cold and neutral to a hot and ionized state (for a review, see e.g. Wise 2019). During the EoR, the first stars and galaxies formed in the densest regions of the Universe due to the accretion of baryonic matter on to dark matter (DM) haloes.

Nov 3, 2023 | academic.oup.com | Departamento de Astronomía |Universidad de Concepcion |Institut d’Astrophysique Spatiale

Galaxies in the Universe are not randomly distributed in space; instead, they can be isolated (i.e. a field galaxy) or in gravitationally bound structures, such as groups or galaxy clusters (e.g. Oort 1983; Waldrop 1983). Observations show that cluster galaxies exhibit different properties than those in the field. The distinction between these two in the local Universe is seen in their morphologies (e.g. Oemler 1974; Dressler 1980; Butcher & Oemler 1984; Goto et al.