299 citations · 3.7k across the 92 of their papers we have counts for
6 papers · 1 filter
Cosmological signals of dark matter semi-annihilation
Boris Betancourt Kamenetskaia, Mathias Garny, Alejandro Ibarra +2
The growth of primordial density fluctuations in the early Universe leads to an inhomogeneous dark matter distribution at high redshift, where semi-annihilation processes of the fo…
Galaxy bias renormalization: Two-loop Power Spectrum, One-loop Trispectrum and Bispectrum
Thomas Bakx, Mathias Garny, Henrique Rubira +1
We present a complete treatment of fifth-order renormalized galaxy bias at the one- and two-loop level in real space, including gradient corrections to deterministic bias operators…
Cooling, conduction, compact objects: Gravothermal evolution of dissipative self-interacting dark matter halos
Ludwig D. Schmidt, Moritz S. Fischer, Mathias Garny
Many proposed self-interacting dark matter (SIDM) models give rise to radiative processes that can dissipate energy. Understanding their impact on astrophysical objects through sim…
The End of the First Act: Spectral Running, Interacting Dark Radiation, and the Hubble Tension in Light of ACT DR6 Data
Mathias Garny, Florian Niedermann, Martin S. Sloth
We point out that constraints on reported by the ACT collaboration in their DR6 data release are surprisingly sensitive to the assumptions made about the initial…
The Cosmological Simulation Code OpenGadget3 - Implementation of Self-Interacting Dark Matter
Moritz S. Fischer, Marc Wiertel, Cenanda Arido +7
Dark matter (DM) could be subject to non-gravitational self-interactions which is relevant to resolve potential problems of cold DM on small scales. Their impact on astrophysical o…
Dark Acoustic Oscillations and the Hubble Tension
Mathias Garny, Florian Niedermann, Martin S. Sloth
The Hubble tension and the recently reported anomaly in data from the Dark Energy Spectroscopic Instrument (DESI) are considered to pose serious challenges to the standard CDM m…