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629 papers · 1 filter
In search of progenitors for supernova-less GRBs 060505 and 060614: re-examination of their afterglows
D. Xu, R. L. C. Starling, J. P. U. Fynbo +6
GRB060505 and GRB060614 are nearby long-duration gamma-ray bursts (LGRBs) without accompanying supernovae (SNe) down to very strict limits. They thereby challenge the conventional…
WINGS-SPE Spectroscopy in the WIde-field Nearby Galaxy-cluster Survey
A. Cava, D. Bettoni, B. M. Poggianti +11
Aims. We present the results from a comprehensive spectroscopic survey of the WINGS (WIde-field Nearby Galaxy-cluster Survey) clusters, a program called WINGS-SPE. The WINGS-SPE sa…
Might we eventually understand the origin of the dark matter velocity anisotropy?
Steen H. Hansen
The density profile of simulated dark matter structures is fairly well-established, and several explanations for its characteristics have been put forward. In contrast, the radial…
Evolution in the properties of Lyman-alpha emitters from redshifts z ~ 3 to z ~ 2
Kim K. Nilsson, Christian Tapken, Palle Moeller +5
Context: Narrow-band surveys for Ly-alpha emitters (LAEs) is a powerful tool in detecting high, and very high, redshift galaxies. Even though samples are growing at redshifts z = 3…
Constraining the energy budget of GRB 080721
R. L. C. Starling, E. Rol, A. J. van der Horst +17
We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z=2.591 out to 36 days or 3e6 s since the trigger in the optical and X-ray bands. We do not detec…
Late time observations of GRB080319B: jet break, host galaxy and accompanying supernova
Nial R. Tanvir, Evert Rol, Andrew Levan +15
The Swift discovered GRB080319B was by far the most distant source ever observed at naked eye brightness, reaching a peak apparent magnitude of 5.3 at a redshift of z=0.937. We pre…