Nikolaos Karnesis
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View article: Extracting gravitational wave signals from LISA data in the presence of artifacts
Extracting gravitational wave signals from LISA data in the presence of artifacts Open
The Laser Interferometer Space Antenna (LISA) mission is being developed by ESA with NASA participation. As it has recently passed the Mission Adoption milestone, models of the instruments and noise performance are becoming more detailed, …
View article: Characterization of non-Gaussian stochastic signals with heavier-tailed likelihoods
Characterization of non-Gaussian stochastic signals with heavier-tailed likelihoods Open
Future gravitational wave observatories will give us the opportunity to search for stochastic signals of astrophysical or even cosmological origins. However, parameter estimation and search will be challenging, mostly due to the overlap of…
View article: Efficient GPU-accelerated multisource global fit pipeline for LISA data analysis
Efficient GPU-accelerated multisource global fit pipeline for LISA data analysis Open
The large-scale analysis task of deciphering gravitational-wave signals in the LISA data stream will be difficult, requiring a large amount of computational resources and extensive development of computational methods. Its high dimensional…
View article: Stellar-mass black-hole binaries in LISA: characteristics and complementarity with current-generation interferometers
Stellar-mass black-hole binaries in LISA: characteristics and complementarity with current-generation interferometers Open
Stellar-mass black-hole binaries are the most numerous gravitational-wave sources observed to date. Their properties make them suitable for observation both by ground- and space-based detectors. Starting from synthetic catalogues construct…
View article: Neural density estimation for Galactic binaries in the LISA data analysis
Neural density estimation for Galactic binaries in the LISA data analysis Open
The future space based gravitational wave detector LISA (Laser Interferometer Space Antenna) will observe millions of Galactic binaries constantly present in the data stream. A small fraction of this population (of the order of several tho…
View article: Extraction of gravitational wave signals from LISA data in the presence of artifacts
Extraction of gravitational wave signals from LISA data in the presence of artifacts Open
The Laser Interferometer Space Antenna (LISA) mission is being developed by ESA with NASA participation. As it has recently passed the Mission Adoption milestone, models of the instruments and noise performance are becoming more detailed, …
View article: The interacting double white dwarf population with LISA: Stochastic foreground and resolved sources
The interacting double white dwarf population with LISA: Stochastic foreground and resolved sources Open
Aims. We investigate the impact of tidal torques and mass transfer on the population of double white dwarfs that will be observed with LISA. Methods. Our Galactic distribution of double white dwarfs is based on the combination of a cosmolo…
View article: Catalogues of LISA-detectable sBHB inspirals and confusion backgrounds following the GWTC-3 fiducial model posterior
Catalogues of LISA-detectable sBHB inspirals and confusion backgrounds following the GWTC-3 fiducial model posterior Open
Data set The contents of SNR_min_2_z1_LISA_SNR.tar.gz consist of approximately 10k folders, each corresponding to each of the samples of the public GWTC-3 fiducial sBHB population model posterior, and containing the following files: popula…
View article: Characterization of non-Gaussian stochastic signals with heavier-tailed likelihoods
Characterization of non-Gaussian stochastic signals with heavier-tailed likelihoods Open
Future Gravitational Wave observatories will give us the opportunity to search for stochastic signals of astrophysical, or even cosmological origins. However, parameter estimation and search will be challenging, mostly due to the overlap o…
View article: Tilt-to-length coupling in LISA Pathfinder: Long-term stability
Tilt-to-length coupling in LISA Pathfinder: Long-term stability Open
The tilt-to-length coupling during the LISA Pathfinder mission has been numerically and analytically modeled for particular time spans. In this work, we investigate the long-term stability of the coupling coefficients of this noise. We sho…
View article: Erratum: Computation of stochastic background from extreme-mass-ratio inspiral populations for LISA [Phys. Rev. D <b>108</b>, 103039 (2023)]
Erratum: Computation of stochastic background from extreme-mass-ratio inspiral populations for LISA [Phys. Rev. D <b>108</b>, 103039 (2023)] Open
Received 25 June 2024DOI:https://doi.org/10.1103/PhysRevD.110.049903© 2024 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasGravitational wave detectionGravitational wave sourcesGravitational wavesGravitation, Cosmolo…
View article: In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA
In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA Open
We present an in-depth analysis of the LISA Pathfinder differential acceleration performance over the entire course of its science operations, spanning approximately 500 days. We find: (1) The evolution of the Brownian noise that dominates…
View article: Precision measurements of the magnetic parameters of LISA Pathfinder test masses
Precision measurements of the magnetic parameters of LISA Pathfinder test masses Open
A precise characterization of the magnetic properties of LISA Pathfinder free falling test-masses is of special interest for future gravitational wave observatory in space. Magnetic forces have an important impact on the instrument sensiti…
View article: Nano-Newton electrostatic force actuators for femto-Newton-sensitive measurements: System performance test in the LISA Pathfinder mission
Nano-Newton electrostatic force actuators for femto-Newton-sensitive measurements: System performance test in the LISA Pathfinder mission Open
Electrostatic force actuation is a key component of the system of geodesic reference test masses (TM) for the LISA orbiting gravitational wave observatory and in particular for performance at low frequencies, below 1 mHz, where the observa…
View article: An efficient GPU-accelerated multi-source global fit pipeline for LISA data analysis
An efficient GPU-accelerated multi-source global fit pipeline for LISA data analysis Open
The large-scale analysis task of deciphering gravitational wave signals in the LISA data stream will be difficult, requiring a large amount of computational resources and extensive development of computational methods. Its high dimensional…
View article: Neutron star – white dwarf binaries: probing formation pathways and natal kicks with LISA
Neutron star – white dwarf binaries: probing formation pathways and natal kicks with LISA Open
Neutron star–white dwarf (NS + WD) binaries offer a unique opportunity for studying NS-specific phenomena with gravitational waves. In this paper, we employ the binary population synthesis technique to study the Galactic population of NS +…
View article: LISA Definition Study Report
LISA Definition Study Report Open
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves in the 0.1 mHz to 1 Hz frequency band which will enable th…
View article: Magnetic Field Simulation and Correlated Low-Frequency Noise Subtraction for an In-Orbit Demonstrator of Magnetic Measurements
Magnetic Field Simulation and Correlated Low-Frequency Noise Subtraction for an In-Orbit Demonstrator of Magnetic Measurements Open
In recent years, nanosatellites have revolutionized the space sector due to their significant economic and time-saving advantages. As a result, they have fostered the testing of advanced instruments intended for larger space science missio…
View article: NanoNewton electrostatic force actuators for femtoNewton-sensitive measurements: system performance test in the LISA Pathfinder mission
NanoNewton electrostatic force actuators for femtoNewton-sensitive measurements: system performance test in the LISA Pathfinder mission Open
Electrostatic force actuation is a key component of the system of geodesic reference test masses (TM) for the LISA orbiting gravitational wave observatory and in particular for performance at low frequencies, below 1 mHz, where the observa…
View article: Computation of stochastic background from extreme-mass-ratio inspiral populations for LISA
Computation of stochastic background from extreme-mass-ratio inspiral populations for LISA Open
Extreme mass ratio inspirals (EMRIs) are among the primary targets for the Laser Interferometer Space Antenna (LISA). The extreme mass ratios of these systems result in relatively weak gravitational wave signals, that can be individually r…
View article: Exploring the Potential for Detecting Rotational Instabilities in Binary Neutron Star Merger Remnants with Gravitational Wave Detectors
Exploring the Potential for Detecting Rotational Instabilities in Binary Neutron Star Merger Remnants with Gravitational Wave Detectors Open
We explore the potential for detecting rotational instabilities in the post-merger phase of binary neutron star mergers using different network configurations of upgraded and next-generation gravitational wave detectors. Our study employs …
View article: Tilt-to-length coupling in LISA Pathfinder: A data analysis
Tilt-to-length coupling in LISA Pathfinder: A data analysis Open
We present a study of the tilt-to-length coupling noise during the LISA Pathfinder mission and how it depended on the system’s alignment. Tilt-to-length coupling noise is the unwanted coupling of angular and lateral spacecraft or test mass…
View article: Neutron Star - White Dwarf Binaries: Probing Formation Pathways and Natal Kicks with LISA
Neutron Star - White Dwarf Binaries: Probing Formation Pathways and Natal Kicks with LISA Open
Neutron star-white dwarf (NS+WD) binaries offer a unique opportunity for studying NS-specific phenomena with gravitational waves. In this paper, we employ the binary population synthesis technique to study the Galactic population of NS+WDs…
View article: Eryn: a multipurpose sampler for Bayesian inference
Eryn: a multipurpose sampler for Bayesian inference Open
In recent years, methods for Bayesian inference have been widely used in many different problems in physics where detection and characterization are necessary. Data analysis in gravitational-wave astronomy is a prime example of such a case…
View article: Stochastic gravitational wave background from stellar origin binary black holes in LISA
Stochastic gravitational wave background from stellar origin binary black holes in LISA Open
We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the frequency band of L…
View article: Uncovering stochastic gravitational-wave backgrounds with LISA
Uncovering stochastic gravitational-wave backgrounds with LISA Open
Finding a stochastic gravitational-wave background (SGWB) of astrophysical or primordial origin is one of the quests of current and future gravitational-wave observatories. While detector networks such as LIGO-Virgo-Kagra or pulsar timing …
View article: Heavy-tailed likelihoods for robustness against data outliers: Applications to the analysis of gravitational wave data
Heavy-tailed likelihoods for robustness against data outliers: Applications to the analysis of gravitational wave data Open
In recent years, the field of Gravitational Wave Astronomy has flourished. With the advent of more sophisticated ground-based detectors and space-based observatories, it is anticipated that Gravitational Wave events will be detected at a m…
View article: Stochastic gravitational wave background from stellar origin binary black holes in LISA
Stochastic gravitational wave background from stellar origin binary black holes in LISA Open
We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the frequency band of L…
View article: Uncovering gravitational-wave backgrounds from noises of unknown shape with LISA
Uncovering gravitational-wave backgrounds from noises of unknown shape with LISA Open
Detecting stochastic background radiation of cosmological origin is an exciting possibility for current and future gravitational-wave (GW) detectors. However, distinguishing it from other stochastic processes, such as instrumental noise an…