Dr
Tomohiro Fujita
(Kyoto University)
9/10/19, 2:00 PM
Dark matter
Oral presentation in parallel session
We find that the polarimetric observations of protoplanetary disks are useful to search for ultralight axion (ALPs) dark matter. Axion dark matter predicts the rotation of the linear polarization plane of propagating light, and protoplanetary disks are ideal targets to observe it. We show that a recent observation puts the tightest constraint on the axion-photon coupling constant for axion...
Dr
Toyokazu Sekiguchi
(RESCEU, University of Tokyo)
9/10/19, 2:20 PM
Dark matter
Oral presentation in parallel session
We present the result of our recent simulation of cosmological axion strings. The QCD axion is one of the best motivated particles beyond the standard model and promising candidate of dark matter (DM). IF the spontaneous breaking of the Peccei-Quinn global U(1) symmetry takes place after inflation, DM axions are predominantly produced from axion strings. However, due to lack of our...
Mr
Thomas Edwards
(GRAPPA, University of Amsterdam)
9/10/19, 2:40 PM
Dark matter
Oral presentation in parallel session
We propose a multi-messenger probe of the natural parameter space of QCD axion dark matter (DM) based on observations of black hole-neutron star binary inspirals. It is suggested that a dense DM spike may grow around intermediate mass black holes. The presence of such a spike produces two unique effects: a distinct phase shift in the gravitational wave strain during the inspiral period and an...
Dr
Marco Taoso
(Istituto Nazionale di Fisica Nucleare (INFN) Sezione di Torino)
9/10/19, 3:00 PM
Dark matter
Oral presentation in parallel session
Assuming that dark matter is composed by axion-like particles, we investigate the
the possibility of detecting their decay into photons at radio frequencies. We discuss different astrophysical targets, such as dwarf spheroidal galaxies, the Galactic Center and halo, and galaxy clusters.
The presence of an ambient radiation field leads to a stimulated enhancement of the decay rate,...
Stephen Kuenstner
(Stanford University)
9/10/19, 3:20 PM
Dark matter
Oral presentation in parallel session
There is compelling evidence that the vast majority of matter in the universe is not explained by the standard model, and interacts only weakly with ordinary matter. However, the identity of dark matter remains a mystery. While weakly interacting massive particles (WIMPs) have been the focus of direct detection searches for several decades, there is growing interest in ultra-light, wave-like...
