Publications (25)
Identification of high-energy astrophysical point sources via hierarchical Bayesian nonparametric clustering
Andrea Sottosanti, Mauro Bernardi, Alessandra R. Brazzale +4
The light we receive from distant astrophysical objects carries information about their origins and the physical mechanisms that power them. The study of these signals, however, is…
Dwarf galaxy annihilation and decay emission profiles for dark matter experiments
Alex Geringer-Sameth, Savvas M. Koushiappas, Matthew Walker
Gamma-ray searches for dark matter annihilation and decay in dwarf galaxies rely on an understanding of the dark matter density profiles of these systems. Conversely, uncertainties…
Dark matter line search using a joint analysis of dwarf galaxies with the Fermi Gamma-ray Space Telescope
Alex Geringer-Sameth, Savvas M. Koushiappas
We perform a joint analysis of dwarf galaxy data from the Fermi Gamma-ray Space Telescope in search of dark matter annihilation into a gamma-ray line. We employ a novel statistical…
Survey-Wide Asteroid Discovery with a High-Performance Computing Enabled Non-Linear Digital Tracking Framework
Nathan Golovich, Trevor Steil, Alex Geringer-Sameth +3
Modern astronomical surveys detect asteroids by linking together their appearances across multiple images taken over time. This approach faces limitations in detecting faint astero…
Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
Sergey E. Koposov, Matthew G. Walker, Vasily Belokurov +9
We report the discovery of a nearby dwarf galaxy in the constellation of Hydrus, between the Large and the Small Magellanic Clouds. Hydrus 1 is a mildy elliptical ultra-faint syste…
Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
Alex Geringer-Sameth, Matthew G. Walker, Savvas M. Koushiappas +4
We present a search for gamma-ray emission from the direction of the newly discovered dwarf galaxy Reticulum II. Using Fermi-LAT data, we detect a signal that exceeds expected back…