Search Publications
The PAU survey: measurement of narrow-band galaxy properties with approximate bayesian computation
Tortorelli, Luca; Amara, Adam; Refregier, Alexandre +22 more
Narrow-band imaging surveys allow the study of the spectral characteristics of galaxies without the need of performing their spectroscopic follow-up. In this work, we forward-model the Physics of the Accelerating Universe Survey (PAUS) narrow-band data. The aim is to improve the constraints on the spectral coefficients used to create the galaxy sp…
X-ray shapes of elliptical galaxies and implications for self-interacting dark matter
Jeltema, T.; McDaniel, A.; Profumo, S.
Several proposed models for dark matter posit the existence of self-interaction processes that can impact the shape of dark matter halos, making them more spherical than the ellipsoidal halos of collisionless dark matter. One method of probing the halo shapes, and thus the strength of the dark matter self-interaction, is by measuring the shape of …
Towards a more rigorous treatment of uncertainties on the velocity distribution of dark matter particles for capture in stars
Lopes, Ilídio; Lacroix, Thomas; Lopes, José
Dark matter (DM) capture in stars offers a rich phenomenology that makes it possible to probe a wide variety of particle DM scenarios in diverse astrophysical environments. In spite of decades of improvements to refine predictions of capture-related observables and better quantify astrophysical and particle-physics uncertainties, the actual impact…
Nonthermal element abundances at astrophysical shocks
Eichmann, Björn; Rachen, Jörg P.
The nonthermal source abundances of elements play a crucial role in the understanding of cosmic ray phenomena from a few GeV up to several tens of EeV . We present a first systematic approach to describe the change of the abundances from the thermal to the nonthermal state via diffusive shock acceleration by a temporally evolving shock. We conside…
Testing the predictions of axisymmetric distribution functions of galactic dark matter with hydrodynamical simulations
Lavalle, Julien; Petač, Mihael; Núñez-Castiñeyra, Arturo +1 more
Signal predictions for galactic dark matter (DM) searches often rely on assumptions regarding the DM phase-space distribution function (DF) in halos. This applies to both particle (e.g. p-wave suppressed or Sommerfeld-enhanced annihilation, scattering off atoms, etc.) and macroscopic DM candidates (e.g. microlensing of primordial black holes). As …