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Birth of the first stars amidst decaying and annihilating dark matter
Wenzer Qin, Julian B. Munoz, Hongwan Liu +1
The first stars are expected to form through molecular-hydrogen (H) cooling, a channel that is especially sensitive to the thermal and ionization state of gas, and can thus act…
Breaking degeneracies in the first galaxies with clustering
Julian B. Muñoz, Jordan Mirocha, Steven Furlanetto +1
The high-redshift galaxy UV luminosity function (UVLF) has become essential for understanding the formation and evolution of the first galaxies. Yet, UVLFs only measure galaxy abun…
Insights from HST into Ultra-Massive Galaxies and Early-Universe Cosmology
Nashwan Sabti, Julian B. Muñoz, Marc Kamionkowski
The early-science observations made by the James Webb Space Telescope (JWST) have revealed an excess of ultra-massive galaxy candidates that appear to challenge the standard cosmol…
Detecting and Characterizing Young Quasars. III. The Impact of Gravitational Lensing Magnification
Minghao Yue, Anna-Christina Eilers, Robert A. Simcoe +8
We test the impact of gravitational lensing on the lifetime estimates of seven high-redshift quasars at redshift . The targeted quasars are identified by their small obs…
An Effective Model for the Cosmic-Dawn 21-cm Signal
Julian B. Muñoz
The 21-cm signal holds the key to understanding the first structure formation during cosmic dawn. Theoretical progress over the last decade has focused on simulations of this signa…