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Katie Mulrey (Radboud), Philipp Moestra21/11/2025, 10:15
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Chen Li21/11/2025, 10:20
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Benjamine Ricketts21/11/2025, 10:40
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Liyi Gu21/11/2025, 11:00
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Eleonora Caruso21/11/2025, 11:20
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Anna Watts21/11/2025, 11:40
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Eliot Pattie21/11/2025, 13:00
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Douglas Carlos21/11/2025, 13:20
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Renze Oosterhuis21/11/2025, 13:40
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Wouter van Zeist21/11/2025, 14:00
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Lorenza Ferrari21/11/2025, 14:20
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Tahina Princy Ranaivomanana21/11/2025, 15:00
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Zsolt Paragi21/11/2025, 15:20
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21/11/2025, 15:40
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Liyi Gu (SRON)
In this talk I will report an exciting discovery from the 2024 X-ray/UV campaign on NGC 3783 led by XRISM: a transient ultra‑fast outflow (UFO) detected with the Resolve instrument, reaching 0.19c and occurring in tight temporal coincidence with the rapid decay of a powerful soft X‑ray/UV flare. The absorption line points to a compact, high‑ionization absorber and suggest a violent ejection...
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Tahina Princy Ranaivomanana
The rapid progress in astronomical observation technologies has led to an enormous increase in light-curve data, bringing both exciting scientific opportunities and major challenges for time-domain astronomy. Traditional analysis techniques often fall short of fully exploiting the scientific potential of these large and increasingly complex datasets. As a result, machine learning algorithms...
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Benjamin Ricketts (SRON)
NEBULA-Xplorer is a new mission concept led by SRON that was approved to advance to the next stage in the recent exploratory mini-Fast ESA call. NEBULA-Xplorer is a small satellite mission that focuses on performing long continuous monitoring of X-ray binaries with modern silicon drift detectors, similar to those of the NICER instrument on the ISS. During mission development, we are...
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Eleonora Caruso (API/SRON)
Low mass X-ray binaries (LMXBs) are systems composed of a compact object (black hole or neutron star) and a low mass (< mSun) companion star. The compact object accretes matter from the companion, forming an accretion disk. The gas in the disk is ionized by the strong X-ray emission from the inner disk region, leading to the appearance of photoionized plasmas. Characterizing their properties...
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Renze Oosterhuis (Radboud University Nijmegen)
Accreting black holes span a wide range of physical regimes across the full mass scale, from stellar-mass X-ray binaries to supermassive active galactic nuclei. Different theoretical approaches are often used to describe each regime. Within the ERC-funded project BlackHollisitic, our long-term goal is to bridge these approaches to create unified models that describe black hole accretion across...
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Wouter van Zeist (Radboud University)
It is currently uncertain how many white dwarf (WD) binaries LISA will be able to detect in the globular clusters (GCs) around the Milky Way, with predictions ranging from zero to dozens. However, there is another question: if there is a WD binary in a GC, would LISA actually be able to resolve it well enough in terms of sky location and distance that the binary could be distinguished from...
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Eliot Pattie (University of Amsterdam)
Accreting black holes and neutron stars, known as X-ray binaries, create very complex environments. One of the components of these X-ray binaries are relativistic jets, which still have many open questions regarding, e.g., their formation mechanism and what properties of the X-ray binary drive their behavior. Neutron star jets are even less understood than those of black holes primarily due to...
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Zsolt Paragi (Joint Institute for VLBI ERIC)
I will introduce the EC-funded ACME project which aims to strengthen synergies between multi-messenger facilities and to bring together scientists from various domains to advance the field. Within the project we are launching a virtual network of Centres of Expertise which will provide access to advanced multi-messenger data analysis methods and tools, along with comprehensive end-to-end...
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Douglas Carlos (Universidade de São Paulo)
We present an analysis of the spectropolarimetric properties of a sample of AGN and Sgr A*, observed with the Atacama Large Millimeter/ submillimeter Array (ALMA) over five VLBI campaigns conducted between 2017 and 2023. We perform a comprehensive characterization of the compact cores in total and polarized intensity, investigating trends in the linear polarization fraction (LP), the electric...
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Chen Li
Using XRISM/Resolve 439 ks time-averaged spectra of the well-known Seyfert-1.5 active galactic nucleus (AGN) in NGC 3783, we investigate the nature of the Fe Kα emission line at 6.4 keV, the strongest and most common X-ray line observed in AGN. Even the narrow component of the line is resolved with evident Fe Kα1 (6.404 keV) and Kα2 (6.391 keV) contributions in a 2:1 flux ratio, fully...
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