96 citations · 275 across the 5 of their papers we have counts for
5 papers
The primordial deuterium abundance at z = 2.504 from a high signal-to-noise spectrum of Q1009+2956
E. O. Zavarygin, J. K. Webb, V. Dumont +1
The spectrum of the quasar Q1009+2956 has been observed extensively on the Keck telescope. The Lyman limit absorption system was previousl…
Dark matter line emission constraints from NuSTAR observations of the Bullet Cluster
S. Riemer-Sørensen, D. Wik, G. Madejski +10
Line emission from dark matter is well motivated for some candidates e.g. sterile neutrinos. We present the first search for dark matter line emission in the 3-80keV range in a poi…
A robust deuterium abundance; Re-measurement of the z=3.256 absorption system towards the quasar PKS1937-1009
S. Riemer-Sørensen, J. K. Webb, N. Crighton +6
The primordial deuterium abundance is an important tracer of the fundamental physics taking place during Big Bang Nucleosynthesis. It can be determined from absorption features alo…
Resolving the discrepancy between lensing and X-ray mass estimates of the complex galaxy cluster Abell 1689
Signe Riemer-Sorensen, Danka Paraficz, Desiree Della Monica Ferreira +3
There is a long-standing discrepancy between galaxy cluster masses determined from X-ray and gravitational lensing observations of which Abell 1689 is a well-studied example. In th…
Sterile neutrinos in the Milky Way: Observational constraints
Signe Riemer-Sorensen, Steen H. Hansen, Kristian Pedersen
We consider the possibility of constraining decaying dark matter by looking out through the Milky Way halo. Specifically we use Chandra blank sky observations to constrain the para…