743 citations · 5.7k across the 86 of their papers we have counts for
7 papers · 1 filter
Cosmology and Astrophysics of CP-Violating Axions
Omar F. Ramadan, Jeremy Sakstein, Djuna Croon
We study the cosmology and astrophysics of axion-like particles (ALPs) with CP-violating Yukawa couplings to nucleons. At finite nucleon density, the ALP's dynamics is governed by…
Dark Dwarfs: Dark Matter-Powered Sub-Stellar Objects Awaiting Discovery at the Galactic Center
Djuna Croon, Jeremy Sakstein, Juri Smirnov +1
We investigate the effects of dark matter annihilation on objects with masses close to the sub-stellar limit, finding that the minimum mass for stable hydrogen burning is larger th…
Multi-Generational Black Hole Population Analysis with an Astrophysically Informed Mass Function
Yannick Ulrich, Djuna Croon, Jeremy Sakstein +1
We analyze the population statistics of black holes in the LIGO/Virgo/KAGRA GWTC-3 catalog using a parametric mass function derived from simulations of massive stars experiencing p…
Neutron Stars in Aether Scalar-Tensor Theory
Christopher Reyes, Jeremy Sakstein
Aether Scalar-Tensor theory is a modification of general relativity proposed to explain galactic and cosmological mass discrepancies conventionally attributed to dark matter.~The t…
First Constraints on a Pixelated Universe in Light of DESI
Jonathan J. Heckman, Omar F. Ramadan, Jeremy Sakstein
Pixelated dark energy is a string theory scenario with a quantum mechanically stable cosmological constant. The number of pixels that make up the universe slowly increases, manifes…
DESI Constraints on Exponential Quintessence
Omar F. Ramadan, Jeremy Sakstein, David Rubin
The DESI collaboration have recently analyzed their first year of data, finding a preference for thawing dark energy scenarios when using parameterized equations of state for dark…
Parameterized Post-Tolman-Oppenheimer-Volkoff Framework for Screened Modified Gravity with an Application to the Secondary Component of GW190814
Christopher Reyes, Jeremy Sakstein
The secondary component of GW190814 has mass in the range --, placing it within the lower mass gap separating neutron stars from black holes. According to t…