55 citations · 142 across the 15 of their papers we have counts for
15 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…
What it takes to solve the Hubble tension through scale-dependent modifications of the primordial power spectrum
Nanoom Lee, Matteo Braglia, Yacine Ali-Haïmoud
We investigate scale-dependent modifications to the primordial scalar power spectrum as potential solutions to the Hubble tension. We use the Fisher-bias formalism, recently adapte…
Extending evolution mapping to massive neutrinos with COMET
A. Pezzotta, A. Eggemeier, G. Gambardella +7
We introduce an extension of the evolution mapping framework to cosmological models that include massive neutrinos. The original evolution mapping framework exploits a degeneracy i…
Boosting galaxy clustering analyses with non-perturbative modelling of redshift-space distortions
Alexander Eggemeier, Nanoom Lee, Román Scoccimarro +4
Redshift-space distortions (RSD), caused by the peculiar velocities of galaxies, are a key modelling challenge in galaxy clustering analyses, limiting the scales from which cosmolo…
Magnetic fields from small-scale primordial perturbations
Nanoom Lee, Yacine Ali-Haimoud
Weak magnetic fields must have existed in the early Universe, as they were sourced by the cross product of electron density and temperature gradients through the Biermann-battery m…
Probing light relics through cosmic dawn
Nanoom Lee, Selim C. Hotinli
We explore the prospects of upcoming 21-cm surveys of cosmic dawn () to provide cosmological information on top of upcoming cosmic microwave background…
What it takes to solve the Hubble tension through modifications of cosmological recombination
Nanoom Lee, Yacine Ali-Haïmoud, Nils Schöneberg +1
We construct data-driven solutions to the Hubble tension which are perturbative modifications to the fiducial CDM cosmology, using the Fisher bias formalism. Taking as proof of…
Probing cosmic birefringence with polarized Sunyaev-Zel'dovich tomography
Nanoom Lee, Selim C. Hotinli, Marc Kamionkowski
If the physics behind dark energy and/or dark matter violates the parity symmetry assumed in the standard cosmological paradigm, the linear polarization of the cosmic microwave bac…
Probing small-scale baryon and dark matter isocurvature perturbations with cosmic microwave background anisotropies
Nanoom Lee, Yacine Ali-Haïmoud
The Universe's initial conditions, in particular baryon and cold dark matter (CDM) isocurvature perturbations, are poorly constrained on sub-Mpc scales. In this paper, we develop a…
HYREC-2: a highly accurate sub-millisecond recombination code
Nanoom Lee, Yacine Ali-Haïmoud
We present the new recombination code HYREC-2, holding the same accuracy as the state-of-the-art codes HYREC and COSMOREC and, at the same time, surpassing the computational speed…