8 papers
Cosmological evolution with decaying dark matter: an integral-equation approach
Nanoom Lee, Anna Bencke, Marc Kamionkowski +1
We present CLASSIER-DDM, an extension of the Boltzmann solver CLASSIER that implements the decaying dark matter (DDM) model via its integral-equation approach. The code handles gen…
Constraints with CMB lensing on dark matter decays to massive decay products
Anna Bencke, Nanoom Lee, Marc Kamionkowski
Motivated by the recent measurements by the Dark Energy Spectroscopic Instrument (DESI) which suggest a late-time matter density approximately 5\% lower than that inferred from Pla…
Compressed Gaussian likelihood for the Planck low- data
Nanoom Lee
We present a compressed Gaussian likelihood for the Planck CMB low- E-mode polarization data, constructed from the SRoll2 likelihood which provides the tightest constraint on…
What it takes to solve the Hubble tension through Modifications of Cosmological Recombination II: in light of ACT DR6 and DESI DR2
Nanoom Lee, Tianji Zhou
We construct data-driven solutions to the Hubble tension, in light of recent data from the Atacama Cosmology Telescope (ACT DR6) and the Dark Energy Spectroscopic Instrument (DESI…
Efficient analytic approximation for small-scale non-cold relic perturbations
Nanoom Lee, Yacine Ali-Haïmoud, Marc Kamionkowski
We develop a highly accurate analytic approximation for small-scale non-cold relic perturbations by solving the collisionless Boltzmann equation in the quasi-stationary regime. The…
Rapid and accurate numerical evolution of linear cosmological perturbations with non-cold relics
Nanoom Lee, José Luis Bernal, Sven Günther +2
We describe the implementation of a new approach to the numerical evaluation of the effects of non-cold relics on the evolution of cosmological perturbations. The Boltzmann hierarc…