350 citations · 4.8k across the 70 of their papers we have counts for
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Gravitational Waves from Collapse of Pressureless Matter in the Early Universe
Ioannis Dalianis, Chris Kouvaris
If an early matter phase of the Universe existed after inflation with the proper power spectrum, enhanced density perturbations can decouple from the Hubble flow, turn around and c…
Gravitational Waves from Density Perturbations in an Early Matter Domination Era
Ioannis Dalianis, Chris Kouvaris
We calculate the gravitational wave background produced from density perturbations in an early matter domination era where primordial black holes form. The formation of black holes…
The Photon Spectrum of Asymmetric Dark Stars
Andrea Maselli, Chris Kouvaris, Kostas D. Kokkotas
Asymmetric Dark Stars, i.e., compact objects formed from the collapse of asymmetric dark matter could potentially produce a detectable photon flux if dark matter particles self-int…
Direct Detection of Dark Matter Bound to the Earth
Riccardo Catena, Chris Kouvaris
We study the properties and direct detection prospects of an as of yet neglected population of dark matter (DM) particles moving in orbits gravitationally bound to the Earth. This…
New Spectral Features from Bound Dark Matter
Riccardo Catena, Chris Kouvaris
We demonstrate that dark matter particles gravitationally bound to the Earth can induce a characteristic nuclear recoil signal at low energies in direct detection experiments. The…
White Dwarf Critical Tests for Modified Gravity
Rajeev Kumar Jain, Chris Kouvaris, Niklas Grønlund Nielsen
Scalar-tensor theories of gravity can lead to modifications of the gravitational force inside astrophysical objects. We exhibit that compact stars such as white dwarfs provide a un…