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Searching for Oscillations in the Primordial Power Spectrum with CMB and LSS Data
Chenxiao Zeng, Ely D. Kovetz, Xuelei Chen +3
Different inflationary models predict oscillatory features in the primordial power spectrum. These can leave an imprint on both the cosmic microwave background (CMB) and the large-…
Finding the Missing Baryons with Fast Radio Bursts and Sunyaev-Zeldovich Maps
Julian B. Muñoz, Abraham Loeb
Almost a third of the cosmic baryons are "missing" at low redshifts, as they reside in the invisible warm-hot intergalactic medium (WHIM). The thermal Sunyaev-Zeldovich (tSZ) effec…
The First Stars May Shed Light on Dark Matter
Abraham Loeb, Julian B. Munoz
Recent observations of hydrogen absorption that occurred when the first stars turned on may give insights into the nature of dark matter.
Efficient Computation of Galaxy Bias with Neutrinos and Other Relics
Julian B. Muñoz, Cora Dvorkin
Cosmological data can be used to search for---and characterize---light particles in the standard model, if these populate our Universe. In addition to the well-known effect of thes…
21-cm Fluctuations from Charged Dark Matter
Julian B. Muñoz, Cora Dvorkin, Abraham Loeb
The epoch of the formation of the first stars, known as the cosmic dawn, has emerged as a new arena in the search for dark matter. In particular, the first claimed 21-cm detection…
Insights on Dark Matter from Hydrogen during Cosmic Dawn
Julian B. Muñoz, Abraham Loeb
The origin and composition of the cosmological dark matter remain a mystery. However, upcoming 21-cm measurements during cosmic dawn, the period of the first stellar formation, can…
Galaxy Bispectrum from Massive Spinning Particles
Azadeh Moradinezhad Dizgah, Hayden Lee, Julian B. Muñoz +1
Massive spinning particles, if present during inflation, lead to a distinctive bispectrum of primordial perturbations, the shape and amplitude of which depend on the masses and spi…