28 citations · 92 across the 13 of their papers we have counts for
13 papers
The Galactic Dynamics of Free-Floating Planets: From Ejection Kicks to Microlensing
Zara Sayed, Stefano Profumo, Nolan Smyth
Free-floating planets (FFPs) may retain dynamical signatures of the mechanisms that eject them from their host systems. We integrate collisionless FFP test particles for $10…
Primordial Black Holes and the First Stars
Julia Monika Koulen, Stefano Profumo, Nolan Smyth
Primordial black holes (PBHs) constitute a compelling dark matter candidate whose gravitational effects could significantly influence early cosmic structure formation. We investiga…
Searching for Free-Floating Planets with TESS: A Few Words of Clarification
Michelle Kunimoto, William DeRocco, Nolan Smyth +1
We recently described the results of an initial search through TESS Sector 61 for free-floating planets. In this short note, we provide important context for our results and clarif…
Searching for Free-Floating Planets with TESS: Results from Sectors 61-65
Michelle Kunimoto, William DeRocco, Nolan Smyth +2
Though free-floating planets (FFPs) may outpopulate their bound counterparts in the terrestrial-mass range, they remain one of the least explored exoplanet demographics. Due to the…
Constraints on Primordial Black Holes from -body simulations of the Eridanus II Stellar Cluster
Julia Monika Koulen, Stefano Profumo, Nolan Smyth
The evolution of old, compact stellar structures provides strong constraints on macroscopic dark matter candidates such as primordial black holes. In view of recent observational d…
New Light on Dark Extended Lenses with the Roman Space Telescope
William DeRocco, Nolan Smyth, Volodymyr Takhistov
The Roman Space Telescope's Galactic Bulge Time Domain Survey will constitute the most sensitive microlensing survey of the Galactic Bulge to date, opening up new opportunities to…
Rogue worlds meet the dark side: revealing terrestrial-mass primordial black holes with the Nancy Grace Roman Space Telescope
William DeRocco, Evan Frangipane, Nick Hamer +2
Gravitational microlensing is one of the strongest observational techniques to observe non-luminous astrophysical bodies. Existing microlensing observations provide tantalizing evi…
Kinetic recoupling of dark matter
Benjamin V. Lehmann, Logan Morrison, Stefano Profumo +1
We study the possibility that dark matter re-enters kinetic equilibrium with a radiation bath after kinetic decoupling, a scenario we dub kinetic recoupling. This naturally occurs,…
Constraints on sub-terrestrial free-floating planets from Subaru microlensing observations
William DeRocco, Nolan Smyth, Stefano Profumo
The abundance of protoplanetary bodies ejected from their parent star system is presently poorly-constrained. With only two existing optical observations of interstellar objects in…
Dark Black Holes in the Mass Gap
Nicolas Fernandez, Akshay Ghalsasi, Stefano Profumo +2
In the standard picture of stellar evolution, pair-instability -- the energy loss in stellar cores due to electron-positron pair production -- is predicted to prevent the collapse…
Simulation Based Inference for Efficient Theory Space Sampling: an Application to Supersymmetric Explanations of the Anomalous Muon (g-2)
Logan Morrison, Stefano Profumo, Nolan Smyth +1
For the purpose of minimizing the number of sample model evaluations, we propose and study algorithms that utilize (sequential) versions of likelihood-to-evidence ratio neural esti…
Gravitational Baryogenesis and Dark Matter from Light Black Holes
Nolan Smyth, Lillian Santos-Olmsted, Stefano Profumo
We study a scenario in which the baryon asymmetry is created through Hawking radiation from primordial black holes via a dynamically-generated chemical potential. This mechanism ca…
Optimal observing strategies for velocity-suppressed dark matter annihilation
Nolan Smyth, Gabriela Huckabee, Stefano Profumo
Numerous particle models for the cosmological dark matter feature a pair-annihilation rate that scales with powers of the relative velocity between the annihilating particles. As a…