443 citations · 2k across the 60 of their papers we have counts for
7 papers · 1 filter
Semi-parametric -ray modeling with Gaussian processes and variational inference
Siddharth Mishra-Sharma, Kyle Cranmer
Mismodeling the uncertain, diffuse emission of Galactic origin can seriously bias the characterization of astrophysical gamma-ray data, particularly in the region of the Inner Milk…
Edges and Endpoints in 21-cm Observations from Resonant Photon Production
Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma +3
We introduce a novel class of signatures---spectral edges and endpoints---in 21-cm measurements resulting from interactions between the standard and dark sectors. Within the contex…
Harnessing the Population Statistics of Subhalos to Search for Annihilating Dark Matter
Jean J. Somalwar, Laura J. Chang, Siddharth Mishra-Sharma +1
The Milky Way's dark matter halo is expected to host numerous low-mass subhalos with no detectable associated stellar component. Such subhalos are invisible unless their dark matte…
Modeling Dark Photon Oscillations in Our Inhomogeneous Universe
Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma +1
A dark photon may kinetically mix with the Standard Model photon, leading to observable cosmological signatures. The mixing is resonantly enhanced when the dark photon mass matches…
The Power of Halometry
Siddharth Mishra-Sharma, Ken Van Tilburg, Neal Weiner
Astrometric weak gravitational lensing is a powerful probe of the distribution of matter on sub-Galactic scales, which harbor important information about the fundamental nature of…
Foreground Mismodeling and the Point Source Explanation of the Fermi Galactic Center Excess
Malte Buschmann, Nicholas L. Rodd, Benjamin R. Safdi +4
The Fermi Large Area Telescope has observed an excess of ~GeV energy gamma rays from the center of the Milky Way, which may arise from near-thermal dark matter annihilation. Firmly…
Dark Photon Oscillations in Our Inhomogeneous Universe
Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma +1
A dark photon may kinetically mix with the ordinary photon, inducing oscillations with observable imprints on cosmology. Oscillations are resonantly enhanced if the dark photon mas…