Search Results for author: Nikolaos Stergioulas

Found 7 papers, 4 papers with code

Eryn : A multi-purpose sampler for Bayesian inference

1 code implementation3 Mar 2023 Nikolaos Karnesis, Michael L. Katz, Natalia Korsakova, Jonathan R. Gair, Nikolaos Stergioulas

In recent years, methods for Bayesian inference have been widely used in many different problems in physics where detection and characterization are necessary.

Astronomy Bayesian Inference +1

Deep Residual Error and Bag-of-Tricks Learning for Gravitational Wave Surrogate Modeling

1 code implementation16 Mar 2022 Styliani-Christina Fragkouli, Paraskevi Nousi, Nikolaos Passalis, Panagiotis Iosif, Nikolaos Stergioulas, Anastasios Tefas

In several cases, small improvements can be observed, but the most significant improvement still comes from the addition of a second network that models the residual error.

Astronomy

Autoencoder-driven Spiral Representation Learning for Gravitational Wave Surrogate Modelling

no code implementations9 Jul 2021 Paraskevi Nousi, Styliani-Christina Fragkouli, Nikolaos Passalis, Panagiotis Iosif, Theocharis Apostolatos, George Pappas, Nikolaos Stergioulas, Anastasios Tefas

Based on this finding, we design a spiral module with learnable parameters, that is used as the first layer in a neural network, which learns to map the input space to the coefficients.

Astronomy Representation Learning

Frequency deviations in universal relations of isolated neutron stars and postmerger remnants

no code implementations24 Feb 2021 Georgios Lioutas, Andreas Bauswein, Nikolaos Stergioulas

We relate the fundamental quadrupolar fluid mode of isolated non-rotating NSs and the dominant oscillation frequency of neutron star merger remnants.

High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology

Equilibrium sequences of differentially rotating stars with post-merger-like rotational profiles

no code implementations20 Nov 2020 Panagiotis Iosif, Nikolaos Stergioulas

We present equilibrium sequences of rotating relativistic stars, constructed with a new rotation law that was proposed by Uryu et al. (2017).

General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena

Comparing Models of Rapidly Rotating Relativistic Stars Constructed by Two Numerical Methods

1 code implementation8 Nov 1994 Nikolaos Stergioulas, John L. Friedman

We present the first direct comparison of codes based on two different numerical methods for constructing rapidly rotating relativistic stars.

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