355 citations · 2.3k across the 49 of their papers we have counts for
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Direct detection of primordial black hole relics as dark matter
Benjamin V. Lehmann, Christian Johnson, Stefano Profumo +1
If dark matter is composed of primordial black holes, such black holes can span an enormous range of masses. A variety of observational constraints exist on massive black holes, an…
The Globular Cluster Origin of the Milky Way Outer Bulge: Evidence from Sodium Bimodality
Young-Wook Lee, Jenny J. Kim, Christian I. Johnson +4
Recent investigations of the double red clump in the color-magnitude diagram of the Milky Way bulge cast serious doubts on the structure and formation origin of the outer bulge. Un…
Search for gamma-ray emission from -wave dark matter annihilation in the Galactic Center
Christian Johnson, Regina Caputo, Chris Karwin +3
Indirect searches for dark matter through Standard Model products of its annihilation generally assume a cross-section which is dominated by a term independent of velocity (-wav…
The Chemical/Dynamical Evolution of the Galactic Bulge
R. Michael Rich, Adam Burgasser, Will Clarkson +2
The last decade has seen apparent dramatic progress in large spectroscopic datasets aimed at the study of the Galactic bulge. We consider remaining problems that appear to be intra…
Light Element Discontinuities Suggest an Early Termination of Star Formation in the Globular Cluster NGC 6402 (M14)
Christian I. Johnson, Nelson Caldwell, R. Michael Rich +2
NGC 6402 is among the most massive globular clusters in the Galaxy, but little is known about its detailed chemical composition. Therefore, we obtained radial velocities and/or che…