John Antoniadis
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View article: Populations Of Binary Compact Objects: The Present (GWTC-4) And The Future (Einstein Telescope)
Populations Of Binary Compact Objects: The Present (GWTC-4) And The Future (Einstein Telescope) Open
Plenary talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/)
View article: Reading signatures of supermassive binary black holes in pulsar timing array observations
Reading signatures of supermassive binary black holes in pulsar timing array observations Open
Constraining the origin of the nanohertz gravitational-wave background necessitates precise noise modelling to avoid parameter estimation biases. In this work, we find the inferred properties of the putative gravitational wave background i…
View article: Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data
Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data Open
Context. Low radio frequency data are highly valuable for enhancing the sensitivity of pulsar timing arrays (PTAs) to propagation effects, such as dispersion measure (DM) variations. These low-frequency observations are particularly sensit…
View article: An RFSoC-based F-engine for ARGOS
An RFSoC-based F-engine for ARGOS Open
Context. Radio interferometers provide the means to perform the wide field-of-view (FoV) high-sensitivity observations required for modern radio surveys. As computing power per cost has increased, there has been a move toward larger arrays…
View article: Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data
Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data Open
Low-frequency radio data improve the sensitivity of pulsar timing arrays (PTAs) to propagation effects such as dispersion measure (DM) variations, enabling better noise characterization essential for detecting the stochastic gravitational …
View article: Rapid construction of joint pulsar timing array data sets: the Lite method
Rapid construction of joint pulsar timing array data sets: the Lite method Open
The International Pulsar Timing Array (IPTA)’s second data release (IPTA DR2) combines decades of observations of 65 millisecond pulsars from 7 radio telescopes. IPTA data sets should be the most sensitive data sets to nanohertz gravitatio…
View article: Terrestrial Very-Long-Baseline Atom Interferometry: summary of the second workshop
Terrestrial Very-Long-Baseline Atom Interferometry: summary of the second workshop Open
View article: Further diagrams of the publication Schürmann, Xu, et al. (Astronomy & Astrophysics)
Further diagrams of the publication Schürmann, Xu, et al. (Astronomy & Astrophysics) Open
Same as Fig. 3, but for initial donor masses of 8, 9, 10, 12, 15, 20, 25, 30, 40, 50, 70 and 99 Msol (see file name). Evolutionary outcome of our binary models at the time when the first SR has formed, or when the system merges, as a funct…
View article: Searches for signatures of ultralight axion dark matter in polarimetry data of the European Pulsar Timing Array
Searches for signatures of ultralight axion dark matter in polarimetry data of the European Pulsar Timing Array Open
Ultralight axionlike particles (ALPs) can be a viable solution to the dark matter problem. The scalar field associated with ALPs, coupled to the electromagnetic field acts as an active birefringent medium, altering the polarization propert…
View article: Formation of twin compact stars in low-mass X-ray binaries
Formation of twin compact stars in low-mass X-ray binaries Open
Context. Millisecond pulsars (MSPs) are laboratories for stellar evolution, strong gravity, and ultra-dense matter. Although MSPs are thought to originate in low-mass X-ray binaries (LMXBs), approximately 27% do not have a binary companion…
View article: Call to Protect the Dark and Quiet Sky from Harmful Interference by Satellite Constellations
Call to Protect the Dark and Quiet Sky from Harmful Interference by Satellite Constellations Open
The growing number of satellite constellations in low Earth orbit (LEO) enhances global communications and Earth observation, and support of space commerce is a high priority of many governments. At the same time, the proliferation of sate…
View article: The impact on astrometry by solar-wind effect in pulsar timing
The impact on astrometry by solar-wind effect in pulsar timing Open
Astrometry of pulsars, particularly their distances, serves as a critical input for various astrophysical experiments using pulsars. Pulsar timing is a primary approach for determining a pulsar’s position, parallax, and distance. In this p…
View article: The impact on astrometry by solar-wind effect in pulsar timing
The impact on astrometry by solar-wind effect in pulsar timing Open
Astrometry of pulsars, particularly their distances, serves as a critical input for various astrophysical experiments using pulsars. Pulsar timing is a primary approach for determining a pulsar's position, parallax, and distance. In this p…
View article: Formation of twin compact stars in low-mass X-ray binaries: Implications on eccentric and isolated millisecond pulsar populations
Formation of twin compact stars in low-mass X-ray binaries: Implications on eccentric and isolated millisecond pulsar populations Open
Millisecond pulsars (MSPs) are laboratories for stellar evolution, strong gravity, and ultra-dense matter. Although MSPs are thought to originate in low-mass X-ray binaries (LMXBs), approximately 27% lack a binary companion, and others are…
View article: Constraints on conformal ultralight dark matter couplings from the European Pulsar Timing Array
Constraints on conformal ultralight dark matter couplings from the European Pulsar Timing Array Open
Millisecond pulsars are extremely precise celestial clocks: as they rotate,\nthe beamed radio waves emitted along the axis of their magnetic field can be\ndetected with radio telescopes, which allows for tracking subtle changes in the\npul…
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
We present the results of a search for continuous gravitational wave signals (CGWs) in the second data release (DR2) of the European Pulsar Timing Array (EPTA) Collaboration. The most significant candidate event from this search has a grav…
View article: Modeling nonstationary noise in pulsar timing array data analysis
Modeling nonstationary noise in pulsar timing array data analysis Open
\n Contains fulltext :\n 308503.pdf (Publisher’s version ) (Open Access)\n
View article: Terrestrial very-long-baseline atom interferometry: Workshop summary
Terrestrial very-long-baseline atom interferometry: Workshop summary Open
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world to discuss the exciting developments in large-scale atom i…
View article: Modeling non stationary noise in pulsar timing array data analysis
Modeling non stationary noise in pulsar timing array data analysis Open
Pulsar Timing Array (PTA) collaborations recently reported evidence for the presence of a gravitational wave background (GWB) in their datasets. The main candidate that is expected to produce such a GWB is the population of supermassive bl…
View article: Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background
Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background Open
The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence for the presence of a nanohertz gravitational-wave background (GWB). Given that each PTA …
View article: The second data release from the European Pulsar Timing Array
The second data release from the European Pulsar Timing Array Open
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and first data releases, respectively, with the correlation proper…
View article: Testing gravity with Pulsars in the SKA Era
Testing gravity with Pulsars in the SKA Era Open
The Square Kilometre Array (SKA) will use pulsars to enable precise measurements of strong gravity effects in pulsar systems, which yield tests of gravitational theories that cannot be carried out anywhere else. The Galactic census of puls…
View article: Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background
Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background Open
The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence for the presence of a nanohertz gravitational-wave background (GWB). Given that each PTA …
View article: PSR J2234+0611: A new laboratory for stellar evolution
PSR J2234+0611: A new laboratory for stellar evolution Open
We report the timing results for PSR J2234+0611, a 3.6 ms pulsar in a 32 day, eccentric (e = 0.13) orbit with a helium white dwarf. The precise timing and eccentric nature of the orbit allow measurements of an unusual number of parameters:…
View article: Practical approaches to analyzing PTA data: Cosmic strings with six pulsars
Practical approaches to analyzing PTA data: Cosmic strings with six pulsars Open
We search for a stochastic gravitational wave background (SGWB) generated by a network of cosmic strings using six millisecond pulsars from Data Release 2 (DR2) of the European Pulsar Timing Array (EPTA). We perform a Bayesian analysis con…
View article: Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm
Second Data Release from the European Pulsar Timing Array: Challenging the Ultralight Dark Matter Paradigm Open
Pulsar Timing Array experiments probe the presence of possible scalar or pseudoscalar ultralight dark matter particles through decade-long timing of an ensemble of galactic millisecond radio pulsars. With the second data release of the Eur…
View article: Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary
Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary Open
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world to discuss the exciting developments in large-scale atom i…
View article: The RoboPol sample of optical polarimetric standards
The RoboPol sample of optical polarimetric standards Open
Context. Optical polarimeters are typically calibrated using measurements of stars with known and stable polarization parameters. However, there is a lack of such stars available across the sky. Many of the currently available standards ar…
View article: The RoboPol sample of optical polarimetric standards
The RoboPol sample of optical polarimetric standards Open
Optical polarimeters are typically calibrated using measurements of stars with known and stable polarization parameters. However, there is a lack of such stars available across the sky. Many of the currently available standards are not sui…
View article: Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars
Variable scintillation arcs of millisecond pulsars observed with the Large European Array for Pulsars Open
We present the first large sample of scintillation arcs in millisecond pulsars (MSPs), analysing 12 sources observed with the Large European Array for Pulsars (LEAP), and the Effelsberg 100-m telescope. We estimate the delays from multipat…