Search Publications
Insights from HST into Ultramassive Galaxies and Early-Universe Cosmology
Kamionkowski, Marc; Muñoz, Julian B.; Sabti, Nashwan
The early-science observations made by the James Webb Space Telescope (JWST) have revealed an excess of ultramassive galaxy candidates that appear to challenge the standard cosmological model (Λ CDM ). Here, we argue that any modifications to Λ CDM that can produce such ultramassive galaxies in the early Universe would also affect the UV galaxy lu…
First Constraints on the Epoch of Reionization Using the Non-Gaussianity of the Kinematic Sunyaev-Zel'dovich Effect from the South Pole Telescope and Herschel-SPIRE Observations
Ade, P. A. R.; Benabed, K.; Bouchet, F. R. +123 more
We report results from an analysis aimed at detecting the trispectrum of the kinematic Sunyaev-Zel'dovich (kSZ) effect by combining data from the South Pole Telescope (SPT) and Herschel-SPIRE experiments over a
Resurrecting Hitomi for Decaying Dark Matter and Forecasting Leading Sensitivity for XRISM
Safdi, Benjamin R.; Dessert, Christopher; Rodd, Nicholas L. +1 more
The Hitomi x-ray satellite mission carried unique high-resolution spectrometers that were set to revolutionize the search for sterile neutrino dark matter (DM) by looking for narrow x-ray lines arising from DM decays. Unfortunately, the satellite was lost shortly after launch, and to date the only analysis using Hitomi for DM decay used data taken…
Search for Dark Matter Ionization on the Night Side of Jupiter with Cassini
Blanco, Carlos; Leane, Rebecca K.
We present a new search for dark matter (DM) using planetary atmospheres. We point out that annihilating DM in planets can produce ionizing radiation, which can lead to excess production of ionospheric H3+ . We apply this search strategy to the night side of Jupiter near the equator. The night side has zero solar irradiation,…
Observation of Alfvén Wave Reflection in the Solar Chromosphere: Ponderomotive Force and First Ionization Potential Effect
Stangalini, Marco; Long, David M.; Brooks, David H. +7 more
We investigate the propagation of Alfvén waves in the solar chromosphere, distinguishing between upward and downward propagating waves. We find clear evidence for the reflection of waves in the chromosphere and differences in propagation between cases with waves interpreted to be resonant or nonresonant with the overlying coronal structures. This …