Dark Matter 2021: From the Smallest to the Largest Scales

Session

DM Indirect Detection

Sep 14, 2021, 5:20 PM

Virtual

Conveners

DM Indirect Detection

• Jose Maria Diego Rodriguez (IFCA)

Contribution list Timetable

99. Overview: Indirect searches for DM

Rebecca Leane

9/14/21, 5:20 PM

I will discuss the latest developments for indirect dark matter searches. This will include the current limits on and status of anomalies in dark matter annihilation and decay searches using gamma rays, antiprotons, and neutrinos. I will also briefly overview other indirect probes of dark matter annihilation using celestial objects.

12. Searching for dark matter subhalos with the Fermi-LAT

Javier Coronado-Blázquez (IFT UAM-CSIC)

9/14/21, 6:10 PM

ΛCDM predicts light dark matter (DM) subhalos (SHs), not massive enough to retain baryons and become visible. If DM is composed of Weakly Interacting Massive Particles (WIMPs), we expect them to annihilate in SHs, producing gamma rays which can be detected with the Large Area Telescope (LAT) on the Fermi satellite, appearing as unidentified sources (unIDs) in the gamma-ray sky. We characterize...

49. Thermal history of Neutron Stars admixed with self-annihilating Dark Matter

M. Angeles Perez-Garcia

9/14/21, 6:30 PM

Neutron Stars (NSs) are born as hot, lepton rich objects that evolve according to the standard paradigm through subsequent time stages where they cool off the excess of energy by emitting, first, neutrinos and, later on, photons. Current descriptions based on Standard Model calculations can not fully explain all the existing cooling data series for the dozens of objects that have been...

85. Population III stars as Dark Matter laboratories

Cosmin Ilie (Colgate University)

9/14/21, 6:50 PM

We show that the mere observation of the first stars (Pop~III stars) in the universe can be used to place tight constraints on the strength of the interaction between dark matter and regular, baryonic matter. We apply this technique to a candidate Pop~III stellar complex discovered with the Hubble Space Telescope at $z\sim7$ and find some of the deepest bounds to-date for both spin-dependent...

91. Dark Neutrons: Cosmology and New Astrophysical Signatures

Nirmal Raj (TRIUMF)

9/14/21, 7:10 PM

New states that mix with the neutron, such as dark baryons and mirror neutrons, have been proposed to address dark matter, baryogenesis, the long-standing neutron lifetime anomaly, and the recent XENON1T excess. I show that such states are extensively probed by (1) Big Bang nucleosynthesis, (2) cosmic microwave background spectra, (3) stability of nuclides in low-metallicity stars, (4) a novel...