Ákos Keresztúri

ORCID: 0000-0001-6420-510X
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About
Contact & Profiles
Research Areas
  • Planetary Science and Exploration
  • Astro and Planetary Science
  • Geology and Paleoclimatology Research
  • Space Exploration and Technology
  • Space Science and Extraterrestrial Life
  • Nuclear reactor physics and engineering
  • Nuclear Materials and Properties
  • Aeolian processes and effects
  • Nuclear Engineering Thermal-Hydraulics
  • Marine and environmental studies
  • Nuclear Physics and Applications
  • Geological and Geochemical Analysis
  • Spaceflight effects on biology
  • Space Satellite Systems and Control
  • Methane Hydrates and Related Phenomena
  • Stellar, planetary, and galactic studies
  • Space exploration and regulation
  • Biocrusts and Microbial Ecology
  • Paleontology and Stratigraphy of Fossils
  • Isotope Analysis in Ecology
  • Geomagnetism and Paleomagnetism Studies
  • High-pressure geophysics and materials
  • Spacecraft and Cryogenic Technologies
  • Scientific Research and Discoveries
  • Geological formations and processes

Konkoly Observatory
2016-2025

Research Centre for Astronomy and Earth Sciences
2015-2024

Astrobiology Center
2020-2024

NASA Astrobiology Institute
2014-2024

Hungarian Academy of Sciences
2012-2024

European Science Foundation
2022-2023

Hungarian Astronomical Association
2009-2021

Astronomical Institute of the Slovak Academy of Sciences
2020

HUN-REN Centre for Energy Research
2012-2018

Eötvös Loránd University
2003-2014

Abstract Mars exploration motivates the search for extraterrestrial life, development of space technologies, and design human missions habitations. Here, we seek new insights pose unresolved questions relating to natural history Mars, habitability, robotic exploration, planetary protection, impacts on society. Key observations findings include: – high escape rates early Mars' atmosphere, including loss water, impact present-day habitability; putative fossils will likely be ambiguous...

10.1017/s1473550421000276 article EN cc-by International Journal of Astrobiology 2021-12-01

In addition to long-lived radioactive nuclei like U and Th isotopes, which have been used measure the age of Galaxy, also with half-lives between 0.1 100 million years (short-lived radionuclides, SLRs) were present in early Solar System (ESS), as indicated by high-precision meteoritic analysis. We review most recent data describe nuclear reaction processes responsible for creation SLRs different types stars supernovae. show how evolution radionuclide abundances Milky Way Galaxy can be...

10.1016/j.ppnp.2018.05.002 article EN cc-by-nc-nd Progress in Particle and Nuclear Physics 2018-05-22

While fluvial features are plentiful on Mars and offer valuable insights into past surface conditions, the climatic conditions inferred from these valleys, like precipitation runoff discharges, remain subject of debate. Model-based estimations have already been applied to several Martian but exploration related numerical has limited. This work applies an improved precipitation-based, steady-state erosion/accumulation model a valley compares it terrestrial analogue dessert catchment area. The...

10.3390/universe11020061 article EN cc-by Universe 2025-02-11

Asteroids with the potential to impact Earth have become a significant focus of scientific research and applied space technology. These bodies are expected be key targets for mitigation actions mining activities in coming decades. Understanding their material characteristics is challenging due effects weathering, which alters mineral composition structure surfaces, resulting featureless infrared spectra. This study details laboratory tests artificial solar wind on meteorites, revealing...

10.3389/fspas.2025.1427387 article EN cc-by Frontiers in Astronomy and Space Sciences 2025-03-03

The erosion rate on Mars has been dwindling throughout its history and its signatures provide paleo-climatic information. Active aeolian abrasion supported by sands is a well-understood mechanism for modern erosion. Abrasive undergoing redistribution, comminution, or deactivation can evolve toward depletion, leading to even weaker condition. This complementary aspect of surface processes not thoroughly investigated in-situ beyond early robotic missions.Zhurong rover's landing the...

10.5194/egusphere-egu25-18467 preprint EN 2025-03-15

Abstract We used a grid‐mapping technique to analyze the distribution of 13 water‐ and ice‐related landforms in Acidalia Planitia as part joint effort study three main basins northern lowlands Mars, that is, Acidalia, Utopia, Arcadia Planitiae. The were mapped at full Context Camera resolution along 300‐km‐wide strip from 20°N 84°N. identified four landform assemblages: (1) Geologically recent polar cap (massive ice), which superposes latitude‐dependent mantle (LDM) (LA1); (2) landforms,...

10.1029/2018je005664 article EN Journal of Geophysical Research Planets 2018-09-13

Abstract This work in Utopia Planitia is the first continuous regional mapping of ice‐related landforms integrated into an effort to study three main basins (Arcadia, Acidalia, and Planitiae) northern plains. The distribution morphotypes these landforms, SHAllow RADar detections, crater size‐frequency measurements (>50 m diameter) were used understand permafrost cryolithology its past evolution relation climate Planitia. Three assemblages identified based on their spatial correlation with...

10.1029/2018je005665 article EN Journal of Geophysical Research Planets 2018-09-13

Occultation light curves of exomoons may give information on their albedo and hence indicate the presence ice cover surface. Icy moons might have subsurface oceans thus these potentially be habitable. The objective our paper is to determine whether next generation telescopes will capable estimations for icy using occultation curves. success measurements depends depth moon's in curve sensitivity used instruments. We applied simple calculations different stellar masses V J photometric bands,...

10.1051/0004-6361/201526672 article EN Astronomy and Astrophysics 2016-06-30
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