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Manuel Meyer (University of Hamburg)11/05/2026, 09:00Invited talk
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Sarah Pearson (DTU Space)11/05/2026, 09:10
Upcoming and ongoing surveys will enable the detection of thousands of stellar streams around external galaxies. These streams form when dwarf galaxies or star clusters are tidally disrupted by their host gravitational potentials, producing elongated structures of stars with coherent, ordered motion. In this talk, I discuss recent advances in the study of extragalactic stellar streams and...
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Dr Marcel Pawlowski (AIP / SDU)11/05/2026, 09:50
Low-mass dwarf satellites of more massive hosts have been used to test cold dark matter expectations, in particular in their internal dynamics, distributions and motion. The latter identified phase-space correlations such as the planes of satellite galaxies and lopsided asymmetries as serious challenges. These build on several well studied systems of satellite galaxies around hosts in the...
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Philip Sørensen (University of Padova / INFN Padova)11/05/2026, 11:00
In this talk, I will review how both QCD axions and axion-like-particles may be produced as dark matter in the early universe. I will start with a quick theoretical motivation for why we should believe in the existence of axions in the first place, and I will then cover the main productions mechanisms which might be responsible for the production of axions as dark matter. This covers, in...
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Jacob Mathias Egge (DESY)11/05/2026, 11:40
The axion is one of the most compelling dark matter candidates, simultaneously resolving the strong CP problem and accounting for the observed dark matter abundance. Detecting it requires extraordinary sensitivity, as the expected signals are buried far below thermal noise. Haloscopes — instruments exploiting axion-photon conversion in a strong magnetic field — have entered a rapidly evolving...
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Prof. Hartmut Grote (Cardiff University)11/05/2026, 13:40
Laser interferometry has revolutionized astronomy by introducing a new sense to the observation of the cosmos. We can now hear the ripples of space-time: gravitational waves.
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In this talk I will focus on how gravitational-wave detectors and their marvellous technology can also be (ab)used to search for ultra-light Dark Matter candidates, such as axion-like particles, scalar fields or dark... -
Prof. Desiree Della Monica Ferreira (DTU)11/05/2026, 14:20
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Julie Magaard Knudsen (University of Southern Denmark)11/05/2026, 15:30
This project investigates current challenges to the cold dark matter (CDM) paradigm by studying the effects of dark matter on cosmological and galactic scales. In particular, it focuses on small scale observations, such as the centres of galaxies, where the data might suggest an alternative dark matter model such as self-interacting dark matter (SIDM).
Using IllustrisTNG as a baseline and...
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Pernille Truong (University of Southern Denmark)11/05/2026, 15:35
This project investigates the impact different theoretical dark matter models can have on galactic structure on small-scale. The two models being considered is the Cold Dark Matter (CDM) and Self-Interacting Dark Matter (SIDM), since SIDM is a current proposal to a solution of the small-cale problem arising from the most succesful dark matter model, CDM. To investigate detailed differences...
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Dominik Pastuszka Malek (University of Southern Denmark)11/05/2026, 15:40
High- and very-high-energy gamma rays from distant extragalactic sources are severely attenuated due to interactions with the extragalactic background light (EBL). This effect could be partially alleviated by introducing Axion-like particles (ALPs), a beyond-Standard Model dark matter candidate that allows for photon-to-ALP oscillations in astrophysical magnetic fields. These oscillations...
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Joakim Rützou Rosenkilde (CP3 - University of Southern Denmark)11/05/2026, 15:45
Cryogenic Single-Photon Detectors, such as Transition-Edge-Sensors (TES) and Superconducting Nanowire Single-Photon Detectors (SNSPD), have achieved high detection efficiency larger than 85\% for optical and near-infrared wavelengths. Fiber-Coupled Blackbody photons has been identified as the dominant source of background signals for both detector systems. In order the achieve ultra-low...
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Mariana P. Júlio (Leibniz-Institut für Astrophysik Potsdam)11/05/2026, 15:50
Nearby dwarf galaxies are strongly dark matter-dominated, making them ideal laboratories for testing empirical relations between dynamical and baryonic properties. A key example is the Radial Acceleration Relation (RAR), describing a tight correlation between baryonic and observed acceleration across a wide mass range. Whether this relation holds in the lowest-mass, dark matter–dominated...
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Kosuke Kanehisa (Leibniz-Institute for Astrophysics Potsdam (AIP))11/05/2026, 15:55
The distribution of dwarf satellite galaxies around massive hosts serves as a useful probe of dark matter at small scales, especially since the effect of baryonic matter within the galaxies themselves on their spatial distribution is minimal. Here, I examine our neighbouring galaxy Andromeda, which hosts a strikingly asymmetrical distribution of satellites aligned towards the Milky Way. I...
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Elmeri Rivasto11/05/2026, 16:00
Superconducting nanowire single-photon detectors (SNSPDs) are a leading technology for single-photon detection in quantum science and its applications, thanks to their high detection efficiency, low noise, and unmatched timing resolution. These properties make SNSPDs attractive candidates for novel rare-event searches, such as those for axions and axion-like particles. However, the presence of...
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Maya Sophia Silverman (University of Copenhagen)11/05/2026, 16:05Astrophysical Dark Matter Searches
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Maya Sophia Silverman (University of Copenhagen)
Self-Interacting Dark Matter (SIDM) is a compelling alternative to Cold Dark Matter that may alleviate the well-known “small scale problems” that arise when comparing simulations to observations of low-mass galaxies. We study SIDM in isolated low-mass galaxies using a novel suite of cosmological high-resolution simulations. We compare the core density evolution, driven by self-interactions, of...
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