270 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of HelsinkiFI18 papers
- Czech Academy of SciencesCZ16 papers
- Helsinki Institute of PhysicsFI7 papers
- Charles UniversityCZ5 papers
- Czech Academy of Sciences, Astronomical InstituteCZ5 papers
- Dorodnitsyn Computing CentreRU5 papers
- Ural Federal UniversityRU5 papers
- Centre National de la Recherche ScientifiqueFR4 papers
- Finnish Geospatial Research InstituteFI4 papers
- Institute of Space SciencesES4 papers
- Museum für NaturkundeDE4 papers
- Johns Hopkins University Applied Physics LaboratoryUS3 papers
19 papers
Impact disruption of Bjurböle porous chondritic projectile
Tomas Kohout, Maurizio Pajola, Assi-Johanna Soini +10
The ~200 m/s impact of a single 400-kg Bjurböle L/LL ordinary chondrite meteorite onto sea ice resulted in the catastrophic disruption of the projectile. This resulted in a signifi…
(433) Eros and (25143) Itokawa surface properties from reflectance spectra
David Korda, Tomáš Kohout, Kateřina Flanderová +2
Context. Upcoming space missions will provide us with surface-resolved NEA reflectance spectra. Neural networks are useful tools for analysing reflectance spectra and determining m…
Successful Kinetic Impact into an Asteroid for Planetary Defense
R. Terik Daly, Carolyn M. Ernst, Olivier S. Barnouin +98
While no known asteroid poses a threat to Earth for at least the next century, the catalog of near-Earth asteroids is incomplete for objects whose impacts would produce regional de…
Ejecta from the DART-produced active asteroid Dimorphos
Jian-Yang Li, Masatoshi Hirabayashi, Tony L. Farnham +61
Some active asteroids have been proposed to be the result of impact events. Because active asteroids are generally discovered serendipitously only after their tail formation, the p…
Neural network for determining an asteroid mineral composition from reflectance spectra
David Korda, Antti Penttilä, Arto Klami +1
Chemical and mineral compositions of asteroids reflect the formation and history of our Solar System. This knowledge is also important for planetary defence and in-space resource u…
Insight into the Distribution of High-pressure Shock Metamorphism in Rubble-pile Asteroids
Nicole Güldemeister, Juulia-Gabrielle Moreau, Tomas Kohout +2
Shock metamorphism in ordinary chondrites allows for reconstructing impact events between asteroids in the main asteroid belt. Shock-darkening of ordinary chondrites occurs at the…
Sub-surface alteration and related change in reflectance spectra of space-weathered materials
K. Chrbolková, P. Halodová, T. Kohout +7
One of the main complications for the interpretation of reflectance spectra of airless planetary bodies is surface alteration by space weathering caused by irradiation by solar win…
Comparison of space weathering spectral changes induced by solar wind and micrometeoroid impacts using ion- and femtosecond-laser-irradiated olivine and pyroxene
K. Chrbolková, R. Brunetto, J. Ďurech +8
Space weathering is a process that changes the surface of airless planetary bodies. Prime space weathering agents are solar wind irradiation and micrometeoroid bombardment. These p…
Experimental constraints on the ordinary chondrite shock darkening caused by asteroid collisions
T. Kohout, E. V. Petrova, G. A. Yakovlev +10
Shock-induced changes in ordinary chondrite meteorites related to impacts or planetary collisions are known to be capable of altering their optical properties. Thus, one can hypoth…
Annama H chondrite - mineralogy, physical properties, cosmic ray exposure, and parent body history
Tomáš Kohout, Jakub Haloda, Patricie Halodová +27
The fall of the Annama meteorite occurred early morning (local time) on April 19, 2014 on the Kola Peninsula (Russia). Based on mineralogy and physical properties, Annama is a typi…
Shock-darkening in ordinary chondrites: determination of the pressure-temperature conditions by shock physics mesoscale modeling
J. Moreau, T. Kohout, K. Wünnemann
We determined the shock-darkening pressure range in ordinary chondrites using the iSALE shock physics code. We simulated planar shock waves on a mesoscale in a sample layer at diff…
Quantum ferromagnet in the proximity of the tricritical point
Petr Opletal, Jan Prokleška, Jaroslav Valenta +7
Echoes of quantum phase transitions (QPTs) at finite temperatures are theoretically and experimentally challenging and unexplored topics. Particularly in metallic quantum ferromagn…
Orbit and dynamic origin of the recently recovered Annama's H5 chondrite
Josep M. Trigo-Rodriguez, Esko Lyytinen, Maria Gritsevich +7
We describe the fall of Annama meteorite occurred in the remote Kola Peninsula (Russia) close to Finnish border on April 19, 2014 (local time). The fireball was instrumentally obse…
Space weathering simulations through controlled growth of iron nanoparticles on olivine
T. Kohout, J. Čuda, J. Filip +9
Airless planetary bodies are directly exposed to space weathering. The main spectral effects of space weathering are darkening, reduction in intensity of silicate mineral absorptio…
Density, porosity, mineralogy, and internal structure of cosmic dust and alteration of its properties during high velocity atmospheric entry
T. Kohout, A. Kallonen, J. -P. Suuronen +6
X-ray microtomography (XMT), X-ray diffraction (XRD) and magnetic hysteresis measurements were used to determine micrometeorite internal structure, mineralogy, crystallography, and…
Density, porosity and magnetic susceptibility of the Košice meteorite shower and homogeneity of its parent meteoroid
Tomáš Kohout, Karol Havrila, Juraj Tóth +21
Bulk and grain density, porosity, and magnetic susceptibility of 67 individuals of Košice H chondrite fall were measured. The mean bulk and grain densities were determined to be 3.…
A comprehensive study of distribution laws for the fragments of Košice meteorite
Maria Gritsevich, Vladimir Vinnikov, Tomáš Kohout +4
In this study, we conduct a detailed analysis of the Košice meteorite fall (February 28, 2010), in order to derive a reliable law describing the mass distribution among the recover…
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland
Tomáš Kohout, Michał S. Bućko, Kai Rasmus +2
Non-invasive geophysical prospecting and a thermodynamic model were used to examine the structure, depth and lateral extent of the frozen core of a palsa near Lake Peerajärvi, in n…
Mineralogy, reflectance spectra, and physical properties of the Chelyabinsk LL5 chondrite, insight into shock induced changes in asteroid regoliths
Tomas Kohout, Maria Gritsevich, Victor I. Grokhovsky +6
The mineralogy and physical properties of Chelyabinsk meteorites (fall, February 15, 2013) are presented. Three types of meteorite material are present, described as the light-colo…