Conveners
Observational Science (OSB): Update from divisions & OSB roadmap
- Archisman Ghosh (Universiteit Gent)
- Marica Branchesi
- Michele Maggiore
Observational Science (OSB): Divs 1, 2 contributions
- Marica Branchesi
- Archisman Ghosh (Universiteit Gent)
- Michele Maggiore
Observational Science (OSB): Div 3, 4, 7 contributions
- There are no conveners in this block
Observational Science (OSB): Div 10 contributions
- Archisman Ghosh (Universiteit Gent)
- Michele Maggiore
- Marica Branchesi
Observational Science (OSB): OSB + EIB
- Michele Maggiore
- Marica Branchesi
- Archisman Ghosh (Universiteit Gent)
We investigate the prospects for detecting a parity-violating gravitational-wave background with third-generation ground-based detector networks through an adapted theoretical approach combined with a data-based approach. We focus on a variety of networks consisting of an Einstein Telescope and two Cosmic Explorer detectors, varying the Einstein Telescope design, detector locations,...
Multi-probe techniques have proven to be powerful tools in modern cosmology.
By breaking degeneracies, they 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 21 cm intensity mapping from neutral hydrogen emission (HI), focusing on its...
The persistence of the Hubble tension requires new validation methods. While gravitational waves provide a promising solution, the rarity of standard sirens has forced to rely on dark sirens and as such, a wealth of dark sirens methods have been developed.
In this talk we will explore our new state-of-the-art models for binary black hole (BBH) merger rates and their applications to...
Disentangling the astrophysical origins of gravitational waves requires confronting population properties of observed source catalogs with theoretical predictions. We investigate the formation of merging binary black holes in two distinct environments: stellar clusters and active galactic nuclei (AGNs). In clusters, repeated three-body interactions determine the dynamical assembly of binaries....
The detection of gravitational waves associated with short GRBs and
observations of the TeV photons from very energetic events were the
main breakthroughs in the gamma-ray burst field in past few years. I will
discuss the recent multi-wavelength observations and theoretical progress
in modelling of prompt GRB emission, including the lepto-hadronic emission
model and the model for VHE...
In this work we present the properties of gravitational waves emitted from the f-mode oscillation of a compact star corresponding to the Object HESS J1731-347 as a Twin Compact Star, a hybrid neutron star with the same mass as a larger, purely hadronic neutron star. HESS J1731-347 is a peculiar object due to its reported compactness consisting of a mass of 0.77 solar masses and a radius of...
All-sky searches for continuous gravitational wave signals, like those expected from asymmetric rotating neutron stars, require to analyse long stretches of data in order to increase the signal-to-noise ratio.
Typically, the heavy processing part starts after all the data to be analysed have been collected. Such a strategy is sub-optimal from a computational perspective and can significantly...
Wide-band searches for continuous gravitational waves are essential to reveal unknown neutron stars without an electromagnetic counterpart. Such searches, however, cover a huge parameter space that makes them computationally bounded. Neutron stars are predicted to slow down their rotation by losing energy through a variety of physical mechanisms, including, e.g, electromagnetic and...
We present the implementation, testing, and results of an anomaly detection pipeline based on convolutional autoencoders. After testing on white noise, we proceed to a test using MDC 1 focusing on mergers involving IMBHs and provide the results.
The Einstein Telescope (ET), along with other next-generation gravitational wave (GW) detectors, will be a key instrument for detecting GWs in the coming decades. However, analyzing the data and estimating source parameters will be challenging, especially given the large number of expected detections – of order $10^5$ per year – which makes current methods based on stochastic sampling...
We describe a fast glitch removal method based on the continuous wavelet transform. We give a full statistical characterization of the method and illustrate it with practical examples based on publicly available LVK data.
Gravitational-wave (GW) astronomy has revolutionized our understanding of the universe, but the precision of its discoveries hinges on the accurate calibration of GW detectors. In this talk, we present a novel Bayesian null-stream method for self-calibration of closed-geometry GW detector networks, such as the Einstein Telescope (ET) and LISA. Unlike traditional approaches that rely on...
As gravitational-wave detectors gain sensitivity at low frequencies, inferring source properties becomes challenging due to long-duration signals and high signal-to-noise ratios. With enhanced low-frequency sensitivity, we also expect to observe many more eccentric binaries, with potentially a large impact on our understanding of binaries. The presence of orbital eccentricity enhances the...
