135 citations · 381 across the 9 of their papers we have counts for
9 papers
aweSOM: a CPU/GPU-accelerated Self-organizing Map and Statistically Combined Ensemble Framework for Machine-learning Clustering Analysis
Trung Ha, Joonas Nättilä, Jordy Davelaar
We introduce aweSOM, an open-source Python package for machine learning (ML) clustering and classification, using a Self-organizing Maps (SOM) algorithm that incorporates CPU/GPU a…
Machine-Learning Characterization of Intermittency in Relativistic Pair Plasma Turbulence: Single and Double Sheet Structures
Trung Ha, Joonas Nättilä, Jordy Davelaar +1
The physics of turbulence in magnetized plasmas remains an unresolved problem. The most poorly understood aspect is intermittency -- spatio-temporal fluctuations superimposed on th…
Scale Statistics of Current Sheets in Relativistic Collisionless Plasma Turbulence
Roberto F. Serrano, Joonas Nättilä, Vladimir Zhdankin
We analyze distributions of the spatial scales of coherent intermittent structures -- current sheets -- obtained from fully kinetic, two-dimensional simulations of relativistic pla…
Radiative plasma simulations of black hole accretion flow coronae in the hard and soft states
Joonas Nättilä
Stellar-mass black holes in x-ray binary systems are powered by mass transfer from a companion star. The accreted gas forms an accretion disk around the black hole and emits x-ray…
Combining Electromagnetic and Gravitational-Wave Constraints on Neutron-Star Masses and Radii
Mohammad Al-Mamun, Andrew W. Steiner, Joonas Nättilä +6
We perform a joint Bayesian inference of neutron-star mass and radius constraints based on GW170817, observations of quiescent low-mass X-ray binaries (QLMXBs), photospheric radius…
Constraining the properties of neutron-star matter with observations
Eemeli Annala, Tyler Gorda, Aleksi Kurkela +2
In this conference-proceedings contribution, we review recent advances in placing model-independent constraints on the properties of cold and dense QCD matter inside neutron stars.…
Observatory science with eXTP
Jean J. M. in 't Zand, Enrico Bozzo, Jinlu Qu +181
In this White Paper we present the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to Observatory Science targets. These include flaring s…
Dense matter with eXTP
Anna L. Watts, Wenfei Yu, Juri Poutanen +73
In this White Paper we present the potential of the Enhanced X-ray Timing and Polarimetry (eXTP) mission for determining the nature of dense matter; neutron star cores host an extr…
General purpose ray-tracing and polarized radiative transfer in General Relativity
Pauli Pihajoki, Matias Mannerkoski, Joonas Nättilä +1
Ray-tracing is a central tool for constructing mock observations of compact object emission and for comparing physical emission models with observations. We present Arcmancer, a pu…