Conveners
BSM with Compact Objects 1
- Aniket Joglekar (UC Riverside)
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Dr Joshua Eby (Weizmann Institute of Science)20/05/2021, 14:00Dark Matter
Axion stars are gravitationally-bound, ground-state configurations composed of very large numbers of axion particles. Their macroscopic properties are determined, in large part, by two fundamental energy scales: $m \ll$ eV, the mass of the axion; and $f \gg$ GeV, the decay constant or symmetry-breaking scale. In this talk, I will show how the properties of axion stars derived in previous...
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Dan Vagie20/05/2021, 14:15Dark Matter
We study the properties of Bose-Einstein Condensate (BEC) systems consisting of two scalars, focusing on both the case where the BEC is stellar scale as well as the case when it is galactic scale. After studying the stability of such systems and making contact with existing single scalar limits, we undertake a numerical study of the two interacting scalars using Einstein-Klein-Gordon (EKG)...
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Zihui Wang (NYU)20/05/2021, 14:30
Multiple microlensing surveys have been conducted to place limits on primordial black holes in nearby dark matter halos. We show that these existing limits on PBHs can be recast to constrain dark matter lenses that are more spatially extended than PBHs. As two representative cases, we consider NFW subhalos and boson stars, which are predicted in many models such as axion miniclusters and axion...
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David Cyncynates20/05/2021, 14:45BSM Physics
Real scalar fields with attractive self-interaction may form self-bound states, called oscillons. These dense objects are ubiquitous in leading theories of dark matter and inflation; of particular interest are long-lived oscillons which survive past 14 Gyr, offering dramatic astrophysical signatures into the present day. In this talk, I will review some of the most striking observables coming...
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Kevin Pils (University of Vienna)20/05/2021, 15:00Dark Matter
In recent years, Bose-Einstein-condensed dark matter, also called scalar-field dark matter (SFDM), has become a popular alternative to CDM, due to its potential resolution of the small-scale problems faced by CDM. We focus on SFDM with a strong, repulsive self-interaction; the Thomas-Fermi regime of SFDM ("SFDM-TF") which provides a length scale $\sim R_\text{TF}$ below which formation of...
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Juri Smirnov (Ohio State University, CCAPP)20/05/2021, 15:15
We present exoplanets as new targets to discover dark matter (DM). Throughout the Milky Way, DM can scatter, become captured, deposit annihilation energy, and increase the heat flow within exoplanets. We estimate upcoming infrared telescope sensitivity to this scenario, finding actionable discovery or exclusion searches. We find that DM with masses below the GeV scale can be probed with...
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