Search Publications
No strong dependence of Lyman continuum leakage on physical properties of star-forming galaxies at ≲ z ≲ 3.5
Schaerer, D.; Bolzonella, M.; Castellano, M. +15 more
We present Lyman continuum (LyC) radiation escape fraction (fesc) measurements for 183 spectroscopically confirmed star-forming galaxies in the redshift range 3.11 < z < 3.53 in the Chandra Deep Field South. We use ground-based imaging to measure fesc, and use ground- and space-based photometry to derive galaxy physical…
An extreme blue nugget, UV-bright starburst at z = 3.613 with 90 per cent of Lyman continuum photon escape
Chisholm, J.; Pérez-Fournon, I.; Schaerer, D. +9 more
We present the discovery and analysis of J1316+2614 at z = 3.6130, a UV-bright star-forming galaxy (MUV ≃ -24.7) with large escape of Lyman continuum (LyC) radiation. J1316+2614 is a young (≃10 Myr) star-forming galaxy with SFR ≃ 500 M⊙ yr-1 and a starburst mass of log(M⋆/M⊙) ≃ 9.7. It shows a…
Data Release 2 of S-PLUS: Accurate template-fitting based photometry covering 1000 deg2 in 12 optical filters
Molino, A.; Werle, A.; Mendes de Oliveira, C. +32 more
The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey of ~9300 deg2 in the southern sky in a 12-band photometric system. This paper presents the second data release (DR2) of S-PLUS, consisting of 514 tiles covering an area of 950 deg2. The data has been fully calibrated using a new photometric calibrati…
The discovery of rest-frame UV colour gradients and a diversity of dust morphologies in bright z ≃ 7 Lyman-break galaxies
Bowler, R. A. A.; Cullen, F.; McLure, R. J. +2 more
We present deep ALMA dust continuum observations for a sample of luminous (MUV < -22) star-forming galaxies at z ≃ 7. We detect five of the six sources in the far-infrared (FIR), providing key constraints on the obscured star formation rate (SFR) and the infrared-excess-β (IRX-β) relation without the need for stacking. Despite the ga…
Implications for galaxy formation models from observations of globular clusters around ultra-diffuse galaxies
Beasley, Michael A.; Trujillo, Ignacio; Peletier, Reynier F. +5 more
We present an analysis of Hubble Space Telescope observations of globular clusters (GCs) in six ultradiffuse galaxies (UDGs) in the Coma cluster, a sample that represents UDGs with large effective radii (Re), and use the results to evaluate competing formation models. We eliminate two significant sources of systematic uncertainty in the…
MHD disc winds can reproduce fast disc dispersal and the correlation between accretion rate and disc mass in Lupus
Lodato, G.; van Dishoeck, E. F.; Tabone, B. +3 more
The final architecture of planetary systems depends on the extraction of angular momentum and mass-loss processes of the discs in which they form. Theoretical studies proposed that magnetohydrodynamic winds launched from the discs (MHD disc winds) could govern accretion and disc dispersal. In this work, we revisit the observed disc demographics in…
A deep survey of short GRB host galaxies over z 0-2: implications for offsets, redshifts, and environments
Troja, E.; Cenko, S. B.; Sakamoto, T. +10 more
A significant fraction (30 per cent) of well-localized short gamma-ray bursts (sGRBs) lack a coincident host galaxy. This leads to two main scenarios: (i) that the progenitor system merged outside of the visible light of its host, or (ii) that the sGRB resided within a faint and distant galaxy that was not detected by follow-up observations. Discr…
A 5 per cent measurement of the Hubble-Lemaître constant from Type II supernovae
Zheng, W.; Galbany, L.; Filippenko, A. V. +4 more
The most stringent local measurement of the Hubble-Lemaître constant from Cepheid-calibrated Type Ia supernovae (SNe Ia) differs from the value inferred via the cosmic microwave background radiation (Planck+ΛCDM) by ~5σ. This so-called Hubble tension has been confirmed by other independent methods, and thus does not appear to be a possible consequ…
The effect of returning radiation on relativistic reflection
Reynolds, C. S.; Dauser, T.; Wilms, J. +5 more
We study the effect of returning radiation on the shape of the X-ray reflection spectrum in the case of thin accretion discs. We show that the returning radiation mainly influences the observed reflection spectrum for a large black hole spin (a > 0.9) and a compact primary source of radiation close to the black hole at height h < 5rg
The kinematic properties of Milky Way stellar halo populations
Bovy, Jo; Lane, James M. M.; Mackereth, J. Ted
In the Gaia era, stellar kinematics are extensively used to study Galactic halo stellar populations, to search for halo structures, and to characterize the interface between the halo and hot disc populations. We use distribution function-based models of modern data sets with 6D phase space data to qualitatively describe a variety of kinematic spac…