Search Publications
Bubbles and outflows: The novel JWST/NIRSpec view of the z = 1.59 obscured quasar XID2028
Marconi, A.; Capetti, A.; Brusa, M. +20 more
Quasar feedback in the form of powerful outflows is invoked as a key mechanism to quench star formation in galaxies, although direct observational evidence is still scarce and debated. Here we present Early Release Science JWST NIRSpec IFU observations of the z = 1.59 prototypical obscured Active Galactic Nucleus (AGN) XID2028: This target represe…
Updated constraints from the effective field theory analysis of the BOSS power spectrum on early dark energy
Poulin, Vivian; Smith, Tristan L.; Simon, Théo +1 more
Analyses of the full shape of the Baryon Oscillation Spectroscopic Survey (BOSS) DR12 power spectrum using the one-loop prediction from the effective field theory of large-scale structures (EFTBOSS) have led to new constraints on extensions to the Λ cold dark matter model, such as early dark energy (EDE), which has been suggested as a resolution t…
Close encounters: How stellar flybys shape planet-forming discs
Ménard, François; Price, Daniel J.; Cuello, Nicolás
We review the role of stellar flybys and encounters in shaping planet-forming discs around young stars, based on the published literature on this topic in the last 30 years. Since most stars
JWST Reveals Excess Cool Water near the Snow Line in Compact Disks, Consistent with Pebble Drift
Zhang, Ke; Pascucci, Ilaria; Banzatti, Andrea +19 more
Previous analyses of mid-infrared water spectra from young protoplanetary disks observed with the Spitzer-IRS found an anticorrelation between water luminosity and the millimeter dust disk radius observed with ALMA. This trend was suggested to be evidence for a fundamental process of inner disk water enrichment proposed decades ago to explain some…
Vanadium oxide and a sharp onset of cold-trapping on a giant exoplanet
Kesseli, Aurora Y.; Kasper, David; Bean, Jacob L. +15 more
The abundance of refractory elements in giant planets can provide key insights into their formation histories1. Owing to the low temperatures of the Solar System giants, refractory elements condense below the cloud deck, limiting sensing capabilities to only highly volatile elements2. Recently, ultra-hot giant exoplanets have…
Dilution of chemical enrichment in galaxies 600 Myr after the Big Bang
Heintz, Kasper E.; Brammer, Gabriel B.; Oesch, Pascal A. +10 more
The evolution of galaxies throughout the last 12 Gyr of cosmic time has followed a single, universal relation that connects star-formation rates (SFRs), stellar masses (M⋆) and chemical abundances. Deviation from this fundamental scaling relation would imply a drastic change in the processes that regulate galaxy evolution. Observations …
GA-NIFS: Black hole and host galaxy properties of two z ≃ 6.8 quasars from the NIRSpec IFU
Pérez-González, Pablo G.; Carniani, Stefano; Übler, Hannah +20 more
Aims: Integral field spectroscopy (IFS) with JWST NIRSpec will significantly improve our understanding of the first quasars, by providing spatially resolved, infrared spectroscopic capabilities that cover key rest-frame optical emission lines that have been previously unobservable.
Methods: Here we present our results from the first two …
A catalogue of high-mass X-ray binaries in the Galaxy: from the INTEGRAL to the Gaia era
García, Federico; Chaty, Sylvain; Fortin, Francis +1 more
Context. High-mass X-ray binaries (HMXBs) are a particular class of high-energy sources that require multi-wavelength observational efforts to be properly characterised. New identifications and the refinement of previous measurements are regularly published in the literature by independent teams of researchers and might, when they are collected in…
Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST
Casertano, Stefano; Dolphin, Andrew; Riess, Adam G. +7 more
High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant. We present JWST NIRCAM observations in two epochs and three filters of >320 Cepheids in NGC 4258 (which …
Deep ALMA redshift search of a z ∼ 12 GLASS-JWST galaxy candidate
Santini, Paola; Casey, Caitlin M.; Castellano, Marco +20 more
The JWST has discovered a surprising abundance of bright galaxy candidates in the very early universe (≤500 Myr after the Big Bang), calling into question current galaxy formation models. Spectroscopy is needed to confirm the primeval nature of these candidates, as well as to understand how the first galaxies form stars and grow. Here we present d…