Dark Matter 2025: From the Smallest to the Largest Scale

Session

Friday Morning II

Jun 6, 2025, 12:00 PM

Santander, Spain

60. Primordial black hole accretion in astronomical and cosmological settings

Daniele Gaggero (INFN Pisa)

6/6/25, 12:00 PM

DM Indirect Detection and Astrophysics

Contributed Talk

Massive primordial black holes may accrete baryonic matter and accretion disk are expected to form around them. The radiation emitted in this process can reveal their presence both in astronomical and cosmological settings.
In order to compute realistic constraints, it is critical to understand accretion physics. In this talk I will discuss an accretion model that takes into account radiation...

107. The Canfranc Axion Detection Experiment (CADEx): a novel haloscope search for Dark Matter axions in the mass range 330–460 μeV

Alicia Gómez (CAB (CSIC-INTA))

6/6/25, 12:20 PM

Contributed Talk

A range of haloscope searches are currently probing axions in the mass range ~2-40 μeV. However, simulations of the axion field in the early Universe are increasingly pointing towards heavier masses if we want the axion to comprise all of the Dark Matter in the Universe. I will briefly review these developments and then I will present The Canfranc Axion Detection Experiment (CADEx), a proposed...

68. Discovering Axion-like particles using Multi-band observations of Galaxy clusters and CMB as a backlight.

Harsh Mehta (Tata Institute of Fundamental Research, Mumbai)

6/6/25, 12:40 PM

DM Indirect Detection and Astrophysics

Contributed Talk

Axions or axion-like particles (ALPs) are hypothetical particles predicted by various BSM theories, which make one of the dark matter candidates. If ALPs exist in nature, the CMB photons as they pass through galaxy clusters will convert to ALPs (of mass range $10^{-11}-10^{-14}$ eV), resulting in a polarized spectral distortion in the CMB. The resonant conversions dominate over the...

11. Axion population inside magnetized neutron stars

M. Angeles Perez-Garcia

6/6/25, 1:00 PM

DM Indirect Detection and Astrophysics

Contributed Talk

We study the axionic field structure inside magnetized neutron stars where a non-vanishing magnetic field is present. Typically magnetic field strength may be as large as 1e15 G in the surface for magnetars and a few orders of magnitude larger in the very central core. We explore the additional effect of a tiny electric field under the non-perfect conductor approximation using hypothetical...