activity
20242026
most citedNot-quite-primordial black holes

1 citations · 1 across the 2 of their papers we have counts for

collaborators

6 papers

astro-ph.CO2026

A Burst of Reionization in the Dark Ages

Neal Weiner, Soubhik Kumar, Wenzer Qin +3

Primordial overdensities at small scales can be significantly larger than those observed at large scales. As a result, they can collapse much earlier, at redshifts . In…

astro-ph.CO2026

Enhanced density fluctuations: consequences for stellar dynamics and dark matter substructure

Wenzer Qin, David E. Kaplan, Neal Weiner

Enhanced density fluctuations form early dark matter halos, which serve as early gravitational potential wells for baryons. These baryons can then condense to form stars and black…

astro-ph.CO2026

FOSSIL: A future mission for CMB spectral distortion measurements

N. Aghanim, B. Maffei, J. Aumont +96

We present FOSSIL, a proposed space mission which is designed to deliver unprecedented absolute spectroscopic measurements of the sky intensity over a broad frequency range (50GHz…

astro-ph.CO2026

Peering Beyond the Veil of Last Scattering: A View of the Universe with CMB Spectral Distortions

Bryce Cyr, Nabila Aghanim, Ethan Baker +37

The frequency spectrum of the cosmic microwave background is the most precise blackbody ever measured in nature, with deviations constrained at the level of almost one part per mil…

astro-ph.CO2025★ 1 cited

Not-quite-primordial black holes

Wenzer Qin, Soubhik Kumar, Priyamvada Natarajan +1

We propose a new mechanism for the formation of seeds of supermassive black holes at early cosmic epochs. Our scenario explores density fluctuations that are enhanced relative to $…

astro-ph.CO2024

Illuminating the Cosmos: Dark matter, primordial black holes, and cosmic dawn

Wenzer Qin

The -CDM model of cosmology has done much to clarify our picture of the early universe. However, there are still some questions that -CDM does not necessarily answer; questio…