Search Publications
The MUSE Hubble Ultra Deep Field Survey. XV. The mean rest-UV spectra of Lyα emitters at z > 3
Feltre, Anna; Bacon, Roland; Tresse, Laurence +22 more
We investigated the ultraviolet (UV) spectral properties of faint Lyman-α emitters (LAEs) in the redshift range 2.9 ≤ z ≤ 4.6, and we provide material to prepare future observations of the faint Universe. We used data from the MUSE Hubble Ultra Deep Survey to construct mean rest-frame spectra of continuum-faint (median MUV of -18 and do…
AGN feedback in a galaxy merger: multi-phase, galaxy-scale outflows with a fast molecular gas blob ∼6 kpc away from IRAS F08572+3915
Lutz, D.; Genzel, R.; Maiolino, R. +12 more
To understand the role that active galactic nuclei (AGN) feedback plays in galaxy evolution, we need in-depth studies of the multi-phase structure and energetics of galaxy-wide outflows. In this work, we present new, deep (∼50 h) NOEMA CO(1-0) line observations of the molecular gas in the powerful outflow driven by the AGN in the ultra-luminous in…
Highly Alfvénic slow solar wind at 0.3 au during a solar minimum: Helios insights for Parker Solar Probe and Solar Orbiter
Matteini, L.; Horbury, T. S.; Bruno, R. +4 more
Alfvénic fluctuations in solar wind are an intrinsic property of fast streams, while slow intervals typically have a very low degree of Alfvénicity, with much more variable parameters. However, sometimes a slow wind can be highly Alfvénic. Here we compare three different regimes of solar wind, in terms of Alfvénic content and spectral properties, …
The high-energy environment and atmospheric escape of the mini-Neptune K2-18 b
Udry, Stéphane; Pepe, Francesco; dos Santos, Leonardo A. +6 more
K2-18 b is a transiting mini-Neptune that orbits a nearby (38 pc), cool M3 dwarf and is located inside its region of temperate irradiation. We report on the search for hydrogen escape from the atmosphere K2-18 b using Lyman-α transit spectroscopy with the Space Telescope Imaging Spectrograph instrument installed on the Hubble Space Telescope. We a…
GOODS-ALMA: Optically dark ALMA galaxies shed light on a cluster in formation at z = 3.5
Magnelli, B.; Daddi, E.; Elbaz, D. +30 more
Thanks to its outstanding angular resolution, the Atacama Large Millimeter/submillimeter Array (ALMA) has recently unambiguously identified a population of optically dark galaxies with redshifts greater than z = 3, which play an important role in the cosmic star formation in massive galaxies. In this paper we study the properties of the six optica…
The discovery of radio halos in the frontier fields clusters Abell S1063 and Abell 370
Churazov, E.; Zitrin, A.; Lovisari, L. +13 more
Context. Massive merging galaxy clusters often host diffuse megaparsec-scale radio synchrotron emission. This emission originates from relativistic electrons in the ionized intracluster medium. An important question is how these synchrotron emitting relativistic electrons are accelerated.
Aims: Our aim is to search for diffuse emission in the…
Aluminium oxide in the atmosphere of hot Jupiter WASP-43b
Helling, Christiane; Chubb, Katy L.; Min, Michiel +2 more
We have conducted a re-analysis of publicly available Hubble Space Telescope Wide Field Camera 3 (HST WFC3) transmission data for the hot-Jupiter exoplanet WASP-43b, using the Bayesian retrieval package Tau-REx. We report evidence of AlO in transmission to a high level of statistical significance (>5σ in comparison to a flat model, and 3.4σ in …
Deciphering the Lyman α blob 1 with deep MUSE observations
Scarlata, Claudia; Hayes, Matthew; Herenz, Edmund Christian
Context. Lyman α blobs (LABs) are large-scale radio-quiet Lyman α (Lyα) nebula at high-z that occur predominantly in overdense proto-cluster regions. In particular, there is the prototypical SSA22a-LAB1 at z = 3.1, which has become an observational reference for LABs across the electromagnetic spectrum.
Aims: We want to understand the powerin…
Decoding the radial velocity variations of HD 41248 with ESPRESSO
Adibekyan, V.; Sousa, S. G.; Barros, S. C. C. +13 more
Context. Twenty-four years after the discoveries of the first exoplanets, the radial-velocity (RV) method is still one of the most productive techniques to detect and confirm exoplanets. But stellar magnetic activity can induce RV variations large enough to make it difficult to disentangle planet signals from the stellar noise. In this context, HD…
The WISSH quasars project. VII. The impact of extreme radiative field in the accretion disc and X-ray corona interplay
Fiore, F.; Marconi, A.; Vignali, C. +14 more
Hyper-luminous quasars (Lbol ≳ 1047 erg s-1) are ideal laboratories to study the interaction and impact of the extreme radiative field and the most powerful winds in the active galactic nuclei (AGN) nuclear regions. They typically exhibit low coronal X-ray luminosity (LX) compared to the ultraviolet (UV)…