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LOFAR high-band antenna observations of the Perseus cluster: The discovery of a giant radio halo
Brunetti, G.; Shimwell, T. W.; Gastaldello, F. +13 more
The Perseus cluster is the brightest X-ray cluster in the sky and is known as a cool-core galaxy cluster. Being a very nearby cluster, it has been extensively studied. This has provided a comprehensive view of the physical processes that operate in the intracluster medium (ICM), including feedback from the active galactic nucleus (AGN) 3C 84 and m…
Euclid: High-precision imaging astrometry and photometry from Early Release Observations: I. Internal kinematics of NGC6397 by combining Euclid and Gaia data
Altieri, B.; Cimatti, A.; Baccigalupi, C. +175 more
The instruments at the focus of the Euclid space observatory offer superb, diffraction-limited imaging over an unprecedented (from space) wide field of view of 0.57 deg2. This exquisite image quality has the potential to produce high-precision astrometry for point sources once the undersampling of Euclid's cameras is taken into account …
Euclid: The rb‑M* relation as a function of redshift: I. The 5 × 109 M⊙ black hole in NGC 1272
Cimatti, A.; Baccigalupi, C.; Burigana, C. +148 more
Core ellipticals, which are massive early-type galaxies with almost constant inner surface brightness profiles, are the result of dry mergers. During these events, a binary black hole (BBH) is formed, destroying the original cuspy central regions of the merging objects and scattering stars that are not on tangential orbits. The size of the emergin…