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Measuring the cosmic expansion rate using 21-cm velocity acoustic oscillations
Debanjan Sarkar, Ely D. Kovetz
The fluctuations in the dark matter-baryon relative velocity field are imprinted as acoustic oscillations in the 21-cm power spectrum during cosmic dawn (CD). These velocity acoust…
The Sigma-8 Tension is a Drag
Vivian Poulin, José Luis Bernal, Ely Kovetz +1
Measurements of weak gravitational lensing at low redshifts (), quantified by the parameter , favor weaker matter clustering than that expected from the stand…
Probing ultralight scalar, vector and tensor dark matter with pulsar timing arrays
Caner Unal, Federico R. Urban, Ely D. Kovetz
Pulsar timing arrays (PTAs) are sensitive to oscillations in the gravitational potential along the line-of-sight due to ultralight particle pressure. We calculate the probing power…
Closing the window on fuzzy dark matter with the 21cm signal
Jordan Flitter, Ely D. Kovetz
Fuzzy dark matter (FDM) is a well motivated candidate for dark matter (DM) as its tiny mass and large de-Broglie wavelength suppress small-scale matter fluctuations, thereby solvin…
Unveiling cosmological information on small scales with line intensity mapping
Sarah Libanore, Caner Unal, Debanjan Sarkar +1
One of the toughest challenges in modern cosmology is to probe the small scales Mpc in the matter power spectrum and clustering. We show that such small scales…
Line-Intensity Mapping: Theory Review
José Luis Bernal, Ely D. Kovetz
Line-intensity mapping (LIM) is an emerging approach to survey the Universe, using relatively low-aperture instruments to scan large portions of the sky and collect the total spect…