226 citations · 2.4k across the 58 of their papers we have counts for
18 papers · 1 filter
Gamma-ray bursts as probes of high-redshift Lyman-alpha emitters and radiative transfer models
J. -B. Vielfaure, S. D. Vergani, M. Gronke +7
We present the updated census and statistics of Lyman- emitting long gamma-ray bursts host galaxies (LAE-LGRBs). We investigate the properties of a sub-sample of LAE-LGRBs and t…
Lyman continuum leakage in faint star-forming galaxies at redshift z=3-3.5 probed by gamma-ray bursts
J. -B. Vielfaure, S. D. Vergani, J. Japelj +23
We present the observations of Lyman continuum (LyC) emission in the afterglow spectra of GRB 191004B at , together with those of the other two previously known LyC-emitt…
Simulating MOS science on the ELT: Ly forest tomography
J. Japelj, C. Laigle, M. Puech +14
Mapping of the large-scale structure through cosmic time has numerous applications in the studies of cosmology and galaxy evolution. At , the structure can be traced by the…
New constraints on the physical conditions in H-bearing GRB-host damped Lyman- absorbers
K. E. Heintz, J. Bolmer, C. Ledoux +25
We report the detections of molecular hydrogen (H), vibrationally-excited H (H), and neutral atomic carbon (CI), in two new afterglow spectra of GRBs\,181020A ($z=2.9…
On the dust properties of high redshift molecular clouds and the connection to the 2175 Å extinction bump
K. E. Heintz, T. Zafar, A. De Cia +9
We present a study of the extinction and depletion-derived dust properties of gamma-ray burst (GRB) absorbers at showing the presence of neutral carbon (\ion{C}{I}). By mod…
Cold gas in the early Universe. Survey for neutral atomic-carbon in GRB host galaxies at 1 < z < 6 from optical afterglow spectroscopy
K. E. Heintz, C. Ledoux, J. P. U. Fynbo +14
We present a survey for neutral atomic-carbon (CI) along gamma-ray burst (GRB) sightlines, which probes the shielded neutral gas-phase in the interstellar medium (ISM) of GRB host…
Evidence for diffuse molecular gas and dust in the hearts of gamma-ray burst host galaxies
J. Bolmer, C. Ledoux, P. Wiseman +17
Here we built up a sample of 22 GRBs at redshifts observed with X-shooter to determine the abundances of hydrogen, metals, dust, and molecular species. This allows us to st…
X-shooting GRBs at high redshift: probing dust production history
T. Zafar, P. Møller, D. Watson +16
Evolved asymptotic giant branch (AGB) stars and Type Ia supernovae (SNe) are important contributors to the elements that form dust in the interstellar medium of galaxies, in partic…
Investigation of dust attenuation and star formation activity in galaxies hosting GRBs
D. Corre, V. Buat, S. Basa +6
The gamma-ray bursts hosts (GRBHs) are excellent targets to study the extinction properties of dust and its effects on the global emission of distant galaxies. The dust extinction…
The 2175 Å extinction feature in the optical afterglow spectrum of GRB 180325A at z=2.25
T. Zafar, K. E. Heintz, J. P. U. Fynbo +26
The UV extinction feature at 2175 Å is ubiquitously observed in the Galaxy but is rarely detected at high redshifts. Here we report the spectroscopic detection of the 2175 Å bump o…
The fraction of ionizing radiation from massive stars that escapes to the intergalactic medium
N. R. Tanvir, J. P. U. Fynbo, A. de Ugarte Postigo +38
The part played by stars in the ionization of the intergalactic medium remains an open question. A key issue is the proportion of the stellar ionizing radiation that escapes the ga…
VLT/X-shooter GRBs: Individual extinction curves of star-forming regions
T. Zafar, D. Watson, P. Møller +14
The extinction profiles in Gamma-Ray Burst (GRB) afterglow spectral energy distributions (SEDs) are usually described by the Small Magellanic Cloud (SMC)-type extinction curve. In…
Solving the conundrum of intervening strong MgII absorbers towards GRBs and quasars
L. Christensen, S. D. Vergani, S. Schulze +33
Previous studies have shown that the incidence rate of intervening strong MgII absorbers towards GRBs were a factor of 2 - 4 higher than towards quasars. Exploring the similar size…
A Molecular gas rich GRB host galaxy at the peak of cosmic star formation
M. Arabsalmani, E. Le Floc'h, H. Dannerbauer +10
We report the detection of the CO(3-2) emission line from the host galaxy of Gamma Ray Burst (GRB) 080207 at = 2.086. This is the first detection of molecular gas in emission f…
Constraints on the Lyman continuum escape fraction for faint star forming galaxies
J. Japelj, E. Vanzella, F. Fontanot +6
Star forming galaxies have long been considered the dominant sources of the cosmic ultraviolet background radiation at early epochs. However, observing and characterizing the galax…
Detection of emission lines from z ~ 3 DLAs towards the QSO J2358+0149
Raghunathan Srianand, Tanvir Hussain, Pasquier Noterdaeme +5
Using VLT/X-shooter we searched for emission line galaxies associated to four damped Lyman- systems (DLAs) and one sub-DLA at 2.73<=z<=3.25 towards QSO J2358+0149. We detect [O…
GRB hosts through cosmic time - VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1 < z < 3.6
T. Krühler, D. Malesani, J. P. U. Fynbo +41
[Abridged] We present data and initial results from VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1<z<3.6, the largest sample of GRB host spectroscopy a…
The mysterious optical afterglow spectrum of GRB140506A at z=0.889
J. P. U. Fynbo, T. Krühler, K. Leighly +40
Context. Gamma-ray burst (GRBs) afterglows probe sightlines to star-forming regions in distant star-forming galaxies. Here we present a study of the peculiar afterglow spectrum of…