Conveners
OSB
- Marica Branchesi
- Paolo Pani
- Archisman Ghosh (Universiteit Gent)
OSB
- Paolo Pani
- Archisman Ghosh (Universiteit Gent)
- Marica Branchesi
OSB
- Marica Branchesi
- Archisman Ghosh (Universiteit Gent)
- Paolo Pani
OSB
- Archisman Ghosh (Universiteit Gent)
- Marica Branchesi
- Paolo Pani
OSB
- Marica Branchesi
- Archisman Ghosh (Universiteit Gent)
- Paolo Pani
OSB
- Marica Branchesi
- Paolo Pani
- Archisman Ghosh (Universiteit Gent)
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Romeo Felice Rosato16/06/2026, 08:30Div1talk
The ringdown phase of compact-object mergers is a key target for precision tests of gravity with next-generation detectors such as the Einstein Telescope. Current analyses are based on quasinormal modes, whose theoretical interpretation is however limited by their sensitivity to perturbations and by ambiguities associated with their definition in time, which can affect their robustness as...
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Laura Pezzella (GSSI, INFN)16/06/2026, 08:42Div1talk
Quasinormal modes (QNMs) are the characteristic complex frequencies that govern the ringdown phase of a black hole merger. While their frequencies depend only on the properties of the remnant, the strength with which different modes are excited is determined by the merger dynamics and remains poorly understood. Improving our knowledge of QNM excitation is key to maximizing the science return...
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Dr Soumen Roy (UCLouvain / Royal Observatory Belgium)16/06/2026, 08:54Div1talk
Direct detections of gravitational waves provide a unique opportunity to probe the astrophysical origin of compact binary mergers. The formation channels of these systems remain highly debated, and a fraction may originate in dynamical environments or active galactic nuclei. Binaries formed in such environments are expected to experience line-of-sight acceleration from their surroundings,...
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Matteo Schulz (Gran Sasso Science Institute)16/06/2026, 09:06Div2talk
Multi-probe techniques have proven to be powerful tools in modern cosmology.
By combining different observational tracers, they break degeneracies and provide new ways to gain insights into the large-scale structure (LSS) of the Universe and its evolution.In this talk, we explore the potential of cross-correlation between gravitational waves (GWs) and 21cm intensity mapping from neutral...
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Ulyana Dupletsa (MBI)16/06/2026, 09:18Div2talk
A new synergy is emerging between gravitational waves (GWs) and the study of the Universeโs large-scale structure. Along this line of research, we combine simulated observations of stellar-origin black hole mergers with neutral hydrogen 21 cm intensity mapping to probe cosmic expansion via the distanceโredshift relation. GW signals from binary black holes provide direct distance measurements,...
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Alessandro Agapito16/06/2026, 09:30Div2talk
The rapidly growing field of dark siren cosmology, driven by advances in Gravitational-Wave (GW) detection campaigns and galaxy surveys, is progressing toward independent and increasingly precise measurements of the Hubble constant. As statistical uncertainties shrink, it becomes crucial to control and eliminate emerging systematics to address cosmological and astrophysical challenges. An...
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Matteo Tagliazucchi16/06/2026, 09:42Div2talk
Gravitational wave spectral sirens provide a powerful approach to measuring cosmological parameters โ requiring neither electromagnetic counterparts nor galaxy catalogs โ by leveraging population-level features in the distribution of compact binary mergers. With the Einstein Telescope (ET) set to deliver event catalogs three orders of magnitude larger than current ones, validating the...
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Mathieu Venet (Institut d'Astrophysique de Paris)16/06/2026, 10:24Div3talk
Binary neutron stars (BNS) are prime sources for multi-messenger astronomy, linking gravitational-wave signals from their mergers to high-energy electromagnetic counterparts such as kilonovae.
Although the number of currently observed merging systems remains limited, the next generation of gravitational-wave detectors, such as the Einstein Telescope, is expected to dramatically increase the...
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Dr Lumen Boco (Heidelberg University)16/06/2026, 10:36Div3talk
After four observing runs, the LVK collaboration has estimated a local binary black hole (BBH) merger rate density of $R_0=14-26\, \textrm{Gpc}^{-3}\,\textrm{yr}^{-1}$. In this talk, I will show that current theoretical predictions systematically overestimate the BBH local merger rate when a realistic model of the metallicity-dependent star formation rate is adopted. Specifically, I will...
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Cecilia Sgalletta (University of Heidelberg)16/06/2026, 10:48Div3talk
As the number of gravitational wave detections of binary black hole (BBH) mergers grows, so do the challenges in reconciling theoretical models with observations. Currently, state-of-the-art binary population synthesis codes tend to overpredict the BBH merger rate density compared to the value inferred from LIGO-Virgo_KAGRA observations. A key factor shaping BBH merger rates is the...
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Stefano Torniamenti (Max Planck Institute for Astronomy)16/06/2026, 11:00Div3talk
Over the past decade, gravitational waves have emerged as the primary means for detecting stellar-mass black holes (BHs), unveiling an unprecedented view of their population. These BHs encode key signatures of their progenitor stars, and provide unique probes of stellar and star cluster formation across cosmic time.
In this talk, I explore BH and gravitational-wave populations in star...
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Lucas de Sรก (ITA/ZAH, Universitรคt Heidelberg)16/06/2026, 11:12Div3talk
Rotation has long been recognized as a potential driver of chemical mixing within the otherwise stratified radiative envelopes of massive stars. In the most extreme case, rotational mixing drives chemically homogeneous evolution (CHE), in which surface composition closely tracks core composition during the Main Sequence, forming a compact helium star by the end of hydrogen burning, and...
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Krishnendu Naderi Varium (University of Birmingham)16/06/2026, 11:24Div3talk
Quantify the capabilities of third-generation gravitational wave detector network to probe the properties of first star remnants, population III remnants, in the Universe. Simulating the sources from astrophysically motivated pop III remnant binary black holes and performing full Bayesian inference using \texttt{IMRPHenomXPHM} waveform model, we estimate the accuracy at which the redshift is...
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Benedetta Mestichelli (Gran Sasso Science Institute)16/06/2026, 11:36Div3talk
Population III (Pop. III) stars are promising progenitors of intermediate-mass black holes (IMBHs) due to their reduced mass loss and top-heavy initial mass function. If these stars formed predominantly in star clusters, they could efficiently produce IMBHs up to $10^4\,\rm M_{\odot}$ and generate massive binary systems that eventually merge. In this talk, I will present results from two...
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Francesco Crescimbeni16/06/2026, 11:48Div3talk
Einstein Telescope (ET) will open a new era of gravitational wave observations, extending the lower upper frequency edge to O(1Hz), where GW231123-like astrophysical or primordial intermediate-mass black holes (IMBHs), or more massive, could be observed. In this talk, I will discuss the role of different ET designs and planned locations in measuring the IMBH intrinsic and extrinsic parameters,...
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Lavinia Paiella (GSSI)16/06/2026, 14:00Div3talk
Intermediate-mass black holes (IMBHs), expected to lie in the โผ100-10000 solar mass range between stellar-mass and supermassive black holes, remain one of the least explored populations of compact objects. Gravitational-wave observations offer a promising way to characterize them by directly measuring black hole masses and spins. In this context, the recent candidate event GW231123 reported by...
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Cristiano Ugolini (GSSI)16/06/2026, 14:12Div3talk
Stellar clusters are efficient factories of dynamical interactions and play a crucial role in shaping the black hole (BH) mass distribution observed by gravitational-wave (GW) detectors. The ability of these dynamically active environments to pair and retain BHs enables the formation of remnants more massive than those typically produced through isolated binary evolution. This characteristic...
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Mrs M.Paola Vaccaro (ITA-ZAH, Universitรคt Heidelberg)16/06/2026, 14:24Div3talk
Active galactic nuclei (AGN) disks provide a dense gaseous environment where stellar-mass black holes (BHs) can efficiently form binaries and undergo hierarchical mergers, potentially producing the high-mass and high-spin binary black holes (BBHs) observed by the LIGOโVirgoโKAGRA (LVK) collaboration.
We present an updated semi-analytical population framework that follows the dynamical...
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Tista Mukherjee16/06/2026, 14:36Div4talk
The detection of astrophysical neutrinos and gravitational waves (GWs) has ushered in a new era of multi-messenger astroparticle physics. While coincident detections of GW and neutrinos alongside electromagnetic signals have already been achieved in separate instances, no common source of GW and neutrinos has yet been identified. To address the implications of non-detection, this work...
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Sofia Bisero16/06/2026, 14:48Div4talk
The Einstein Telescope (ET) will revolutionize gravitational-wave (GW) multi-messenger (MM) science by detecting hundreds of thousands of neutron star (NS) mergers beyond the Local Universe. In the ET era, the bottleneck of GW-MM science will shift from GW detection to the identification of the electromagnetic (EM) counterparts. The main challenges will arise from their faintness and rapid...
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Davi Rodrigues (Federal University of Espirito Santo)16/06/2026, 15:00Div4talk
In March 2023, a gamma-ray burst known as GRB 230307A was observed. Recent studies suggest that this event was not a typical burst, but a kilonova โ the aftermath of merging neutron stars that create some of the heaviest elements in the Universe. In this talk, I will explore what makes this event unique: its likely host galaxy, and the surprising fact that the explosion occurred more than 40...
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Dr Matthias Vereecken (University of Ghent)16/06/2026, 15:12Div7talk
Magnetar flares are thought to be associated with gravitational waves (GWs) through different emission processes. In the past, several searches for both short and long duration GW signals from magnetar flares have been performed by the LIGO-Virgo-KAGRA (LVK) collaboration, but no detection has been reported so far. In order to increase the chance of detecting such weak GW signals, higher...
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Dr Fabian Gittins (Utrecht University)16/06/2026, 15:24Div6talk
Third-generation gravitational-wave observatories will transform our ability to probe the physics of neutron stars. It is well known that tidal deformations in compact binaries leave an imprint on the associated gravitational-wave signal. To date, this effect has primarily been treated as a static perturbation, in which the tidal response is characterised by a single parameter: the tidal...
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Gabriele Perna16/06/2026, 15:36Div5talk
The advent of third generation interferometers marks a new era for Gravitational Wave (GW) searches and will enable to shed light on both early- and late-Universe dynamics. In this context, synergies between different Gravitational Wave detectors are crucial for a better detection and characterization of a GW Background, either of cosmological or astrophysical origin. Different cosmological...
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Dr Francesco Iacovelli (Johns Hopkins University)16/06/2026, 15:48Div5talk
Third-generation (3G) gravitational-wave (GW) detectors will usher GW science into the big-data era, with tens to hundreds of thousands of detections each year. At the same time, new detectors in different frequency bands are being considered. These will expand our observational reach and help us access new sources of GWs. In this talk, I will discuss the complementarity of ground-based...
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Anna Puecher17/06/2026, 08:30Div6talk
Studying the post-merger signal of binary-neutron-star systems can provide us with information about matter out of chemical and thermal equilibrium, complementary to what can be inferred from the inspiral phase. Although post-merger signals are weaker, as they involve frequencies in the kilohertz band, next-generation detectors, such as ET, are expected to enable their observation.
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Analyzing... -
Lami Suleiman17/06/2026, 08:42Div6talk
Neutron star astrophysical observables provide a unique insight into the physics of dense matter. The famous binary neutron star merger GW170817 has particularly provided constraints on the equation of state of dense matter, revealing its softening in the core of neutron stars. Such insight is out of the reach of nuclear theory because of the non-perturbative nature of strong-interaction, and...
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Natalie Williams (Universitรคt Potsdam)17/06/2026, 08:54Div6talk
With third-generation gravitational-wave detectors, observations of binary neutron stars will enter a high-precision regime, enabling increasingly tight constraints on the neutron star equation of state. This improved sensitivity places strong demands on waveform accuracy, requiring a wide range of matter effects to be incorporated while keeping dimensionality low for efficient inference....
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Dr Dรกniel Barta (HUN-REN Wigner RCP)17/06/2026, 09:06Div6talk
We investigate equilibrium configurations of neutron stars within scalarโtensor theories of gravity with a massive scalar field. The presence of a non-zero scalar field mass yields some observationally relevant implications, primarily due to the substantial increase in the range of permitted coupling parameters. We examine the impact of the spontaneous scalarization of neutron star on...
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Balรกzs Kacskovics17/06/2026, 09:18Div8talk
CBWaves is a numerical code designed to model gravitational wave emission from compact spinning binaries on eccentric orbits, employing the post-Newtonian (PN) expansion. Originally developed by Pรฉter Csizmadia et al., the code has been continuously maintained and extended by members of the Gravitational Physics Group at HUN-REN Wigner Research Centre for Physics. A recent development includes...
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Patricia Schmidt17/06/2026, 09:30Div9talk
The measurement of spin precession and orbital eccentricity in gravitational-wave signals is a key priority in GW astronomy as these effects provide unique insights into the astrophysical formation and evolution of compact binaries. Moreover, their neglect in waveform models can lead to significant biases in parameter estimation, searches, and tests of general relativity. But accurate and...
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Sumit Kumar (Utrecht University)17/06/2026, 09:42Div10talk
In the era of third-generation gravitational wave detectors such as the Einstein Telescope and Cosmic Explorer, there are multiple challenges for data analysis. One of the most important problems in parameter estimation is accounting for waveform systematics. The waveform models may struggle to meet the accuracy requirements of these detectors across the full range of parameter space. This...
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Josiel Mendonรงa Soares de Souza (Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil)17/06/2026, 10:30Div9talk
The next generation of gravitational-wave observatories, such as the Einstein Telescope and Cosmic Explorer, will detect thousands of compact binary coalescences, placing unprecedented demands on parameter estimation pipelines. Standard Bayesian inference techniques, such as Markov Chain Monte Carlo (MCMC), provide accurate posterior distributions but are computationally expensive, often...
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Enis Belgacem (Universitรฉ de Genรจve)17/06/2026, 10:42Div9talk
Cross-correlations between the outputs of gravitational-wave detectors can be used to detect a stochastic gravitational-wave background (SGWB). Given a pair of detectors, their outputs are correlated through a filter chosen in such a way to maximize the signal-to-noise ratio of the SGWB. I will show in two ways how to solve this optimization problem in the general case where correlations...
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Milan Wils17/06/2026, 10:54Div10talk
Newtonian noise is a key low-frequency noise source for the Einstein Telescope and may include transient bursts generated by anthropogenic activity. Unlike stationary Gaussian noise, such bursts can be strongly non-Gaussian and may therefore affect searches for short-duration gravitational-wave burst signals. In the triangular ET configuration, these disturbances may also be correlated between...
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Chun-Fung Wong (KU Leuven)17/06/2026, 11:06Div10talk
Third-generation gravitational-wave detectors such as the Einstein Telescope
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(ET) will observe compact binary coalescences at event rates orders of magnitude
above those of current detectors. This high event rate introduces a
qualitatively new challenge for matched-filter search pipelines: at realistic
ET-era merger rates, signal-signal coincidences accumulate in the... -
Thomas Ng17/06/2026, 11:18Div10talk
The Einstein Telescope will require parameter estimation methods that scale far beyond current CPU-based pipelines. I will discuss a GPU-native stack built on JAX for fast Bayesian inference. These tools combine differentiable waveform models, machine-learning-enhanced sampling, and GPU-friendly likelihoods to reduce runtimes for current-generation data analysis from hours to minutes on modern...
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Elena Codazzo17/06/2026, 11:30Div7talk
The third-generation gravitational-wave detector Einstein Telescope will observe a large population of compact binary coalescences (CBCs), whose superposition is expected to form an unresolved astrophysical background, particularly relevant at low frequencies. This foreground may affect searches for continuous gravitational waves (CWs) from spinning neutron stars.
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In this work, we investigate... -
Hanna Strozyk (University of Warsaw)17/06/2026, 11:42Div10talk
We present prospects of detecting continuous gravitational waves (CWs) with the Einstein Telescope (ET) proposed configurations: the 2L and triangular geometries.
To assess detectability, we combine the sensitivity depth, used for CW search sensitivity estimation, with the targeted $\mathcal{F}$-statistic, the matched-filtering detection statistic. Using sensitivity depths achieved in...
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Tjonnie Li17/06/2026, 16:00Div10talk
The triangular geometry of the Einstein Telescope is unique among proposed gravitational-wave observatory designs in that it enables the construction of a sky-position-independent null stream: a linear combination of the three co-located detector outputs that is identically insensitive to gravitational-wave signals. This property unlocks a broad range of scientific and data-analysis...
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Robin Chan (Royal Observatory of Belgium | Ghent University)17/06/2026, 16:12Div10talk
Next-generation gravitational wave (GW) observatories, such as the Einstein Telescope, will enable tests of General Relativity (GR) with unprecedented precision. Parameter estimation, however, typically assumes detector noise to be Gaussian and stationary, an assumption that is violated by transient noise artifacts, or โglitchesโ. These must be carefully accounted for and removed from the data...
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Tim Kuhlbusch (RWTH Aachen University)17/06/2026, 16:24Div10talk
Predictions of the uptime behavior of gravitationalโwave detector networks in a realistic operation scenario are essential to assess scientific potential and compare configurations. Data from the LIGO interferometers during Observation Runโฏ4a serves as a basis for extrapolations, because they are of two detectors with similar technology being operated by a single collaboration. This work...
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Luca Negri17/06/2026, 16:36Div10talk
The Einstein Telescope is expected to revolutionize our understanding of the universe through the detection of gravitational waves.
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In this work, we test how the duty cycle affects parameter estimation for astrophysically relevant variables, such as source frame masses and distance, for the triangular and the 2L design. By analyzing a large set of injections with nested sampling algorithms,... -
Francesco Cireddu17/06/2026, 16:48Div10talk
The Einstein Telescope is expected to deliver extraordinary scientific results in gravitational-wave astronomy. However, as the ET design continues to evolve, important analysis challenges still need to be identified to fully realize its science potential, while existing tools for generating mock data are often limited in scope or difficult to use. We present gwmock, a new modular Python...
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Anuradha Samajdar, Archisman Ghosh (Universiteit Gent), Filippo Santoliquido (Gran Sasso Science Institute (GSSI)), Justin Janquart, Michela Mapelli, Paolo Pani, Paul Laycock, Stefano Bagnasco, Tito Dal Canton (IJCLab)17/06/2026, 17:00
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Archisman Ghosh (Universiteit Gent), Michela Mapelli, Paolo Pani17/06/2026, 18:00