888 citations · 3.4k across the 75 of their papers we have counts for
11 papers · 1 filter
Gaia-assisted discovery of a detached low-ionisation BAL quasar with very large ejection velocities
J. P. U. Fynbo, P. Møller, K. E. Heintz +10
We report on the discovery of a peculiar Broad Absorption Line (BAL) quasar identified in our Gaia-assisted survey of red quasars. The systemic redshift of this quasar was difficul…
GRB 190114C in the nuclear region of an interacting galaxy -- A detailed host analysis using ALMA, HST and VLT
A. de Ugarte Postigo, C. C. Thöne, S. Martın +28
GRB 190114C is the first GRB for which the detection of very-high energy emission up to the TeV range has been reported. It is still unclear whether environmental properties might…
GRB171010A / SN2017htp: a GRB-SN at z=0.33
A. Melandri, D. B. Malesani, L. Izzo +41
The number of supernovae known to be connected with long-duration gamma-ray bursts is increasing and the link between these events is no longer exclusively found at low redshift ($…
Identification of strontium in the merger of two neutron stars
Darach Watson, Camilla J. Hansen, Jonatan Selsing +15
Half of all the elements in the universe heavier than iron were created by rapid neutron capture. The theory for this astrophysical `-process' was worked out six decades ago and…
Galaxies through cosmic time illuminated by gamma-ray bursts and quasars
Kasper E. Heintz
In the early Universe, most of the cold neutral gas that will later form into individual stars and galaxies is practically invisible to us. These neutral gas reservoirs can, howeve…
Exploring galaxy dark matter halos across redshifts with strong quasar absorbers
L. Christensen, P. Møller, N. H. P. Rhodin +2
Quasar lines of sight intersect intervening galaxy discs or circum-galactic environments at random impact parameters and potential well depths. Absorption line velocity widths ($Δv…
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…
Short GRB 160821B: a reverse shock, a refreshed shock, and a well-sampled kilonova
G. P. Lamb, N. R. Tanvir, A. J. Levan +31
We report our identification of the optical afterglow and host galaxy of the short-duration gamma-ray burst GRB 160821B. The spectroscopic redshift of the host is , making…
Gaia-assisted selection of a quasar reddened by dust in an extremely-strong Damped Lyman-α Absorber at z=2.226
Stefan Geier, Kasper Elm Heintz, Johan Fynbo +7
Damped Lyman-α Absorbers (DLAs) as a class of QSO absorption-line systems are currently our most important source of detailed information on the cosmic chemical evolution of galaxi…
The spectral evolution of AT 2018dyb and the presence of metal lines in tidal disruption events
Giorgos Leloudas, Lixin Dai, Iair Arcavi +29
We present light curves and spectra of the tidal disruption event (TDE) ASASSN-18pg / AT 2018dyb spanning a period of one year. The event shows a plethora of strong emission lines,…
Signatures of a jet cocoon in early spectra of a supernova associated with a -ray burst
L. Izzo, A. de Ugarte Postigo, K. Maeda +39
Long gamma-ray bursts mark the death of massive stars, as revealed by their association with energetic broad-lined stripped-envelope supernovae. The scarcity of nearby events and t…