TY - CONF AU - Kereszturi, Ákos AU - Pál, Bernadett ED - Bacsárdi, László ED - Kovács, Kálmán TI - Spectral instrument optimization for asteroid missions by space weathering simulation T2 - Proceedings of the 8th International Conference on Research, Technology and Education of Space PB - Magyar Asztronautikai Társaság C1 - Budapest SN - 9789637367342 PY - 2024 SP - 57 UR - https://m2.mtmt.hu/api/publication/34868428 ID - 34868428 LA - English DB - MTMT ER - TY - JOUR AU - Gyollai, Ildikó AU - Biri, Sándor AU - Juhász, Zoltán AU - Király, Csilla AU - Pál, Bernadett AU - Rácz, Richárd Péter AU - Rezes, Dániel AU - Sulik, Béla AU - Szabó, Máté Zoltán AU - Szalai, Zoltán AU - Szavai, P. AU - Szklenár, Tamás AU - Kereszturi, Ákos TI - Irradiation induced mineral changes of NWA10580 meteorite determined by infrared analysis JF - ASTRONOMY & ASTROPHYSICS J2 - ASTRON ASTROPHYS VL - 683 PY - 2024 PG - 12 SN - 0004-6361 DO - 10.1051/0004-6361/202347467 UR - https://m2.mtmt.hu/api/publication/34499100 ID - 34499100 N1 - Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, HUN-REN, Budapest, Hungary HUN-REN, Institute for Nuclear Research, Debrecen, Hungary Konkoly Thege Astronomical Institute, Research Centre for Astronomy and Earth Sciences, HUN-REN, Budapest, Hungary Csfk, Mta Centre of Excellence Budapest, Konkoly Thege Miklós út 15-17., Budapest, 1121, Hungary Eotvos Lorand University of Sciences (ELTE), Budapest, Hungary Geographical Institute, Research Centre for Astronomy and Earth Sciences, HUN-REN, Budapest, Hungary Department of Systems Innovation, School of Engineering, The University of Tokyo, Tokyo, Japan Atomki, Institute of Nuclear Research, Debrecen, 4026, Hungary Export Date: 25 March 2024 CODEN: AAEJA Correspondence Address: Pál, B.D.; Konkoly Thege Astronomical Institute, Hungary; email: pal.bernadett@csfk.org Correspondence Address: Kereszturi, A.; Konkoly Thege Astronomical Institute, Hungary; email: kereszturi.akos@csfk.org AB - Identifying minerals on asteroid surfaces is difficult as space weathering modifies the minerals' infrared spectra. This should be better understood for proper interpretation. We simulated the space weathering effects on a meteorite and recorded the alterations of the crystalline structure, such as the change in peak positions and full width at half maximum values. We used proton irradiation to simulate the effects of solar wind on a sample of NWA 10580 CO3 chondrite meteorites. After irradiation in three gradually increased steps with 1 keV ion energy, we used infrared microscopic reflectance and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to identify and understand the consequences of irradiation. We find negative peak shifts after the first and second irradiations at pyroxene and feldspar minerals, similarly to the literature, and this shift was attributed to Mg loss. However, after the third irradiation a positive change in values in wavenumber emerged for silicates, which could come from the distortion of SiO tetrahedra, resembling shock deformation. The full width at half maximum values of major bands show a positive (increasing) trend after irradiations in the case of feldspars, using IR reflection measurements. Comparing DRIFTS and reflection infrared data, the peak positions of major mineral bands were at similar wavenumbers, but differences can be observed in minor bands . We measured the spectral changes of meteorite minerals after high doses of proton irradiation for several minerals. We show the first of these measurements for feldspars; previous works only presented pyroxene, olivine, and phyllosilicates. LA - English DB - MTMT ER - TY - JOUR AU - Tomka, Richárd Krisztián AU - Boazman, S. AU - Bradák, B. AU - Heather, D.J. AU - Kereszturi, A. AU - Pál, Bernadett AU - Steinmann, Vilmos TI - Boulder distribution, circular polarization, and optical maturity: A survey of example lunar polar terrains for future landing sites JF - ADVANCES IN SPACE RESEARCH J2 - ADV SPACE RES VL - 73 PY - 2024 IS - 4 SP - 2243 EP - 2260 PG - 18 SN - 0273-1177 DO - 10.1016/j.asr.2023.10.005 UR - https://m2.mtmt.hu/api/publication/34429588 ID - 34429588 LA - English DB - MTMT ER - TY - THES AU - Pál, Bernadett TI - Programozási megoldásokkal a Földön kívüli víz nyomában. asztrobiológiai elemzések TS - asztrobiológiai elemzések PB - Eötvös Loránd Tudományegyetem (ELTE) PY - 2023 SP - 127 DO - 10.15476/ELTE.2022.180 UR - https://m2.mtmt.hu/api/publication/34745497 ID - 34745497 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kisvárdai, Imre AU - Pál, Bernadett AU - Kereszturi, Ákos TI - Investigating the porosity of Enceladus JF - MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY J2 - MON NOT R ASTRON SOC VL - 525 PY - 2023 IS - 1 SP - 1246 EP - 1253 PG - 8 SN - 0035-8711 DO - 10.1093/mnras/stad2333 UR - https://m2.mtmt.hu/api/publication/34143227 ID - 34143227 N1 - Export Date: 19 March 2024 CODEN: MNRAA LA - English DB - MTMT ER - TY - BOOK AU - Bérczi, Szaniszló AU - Hargitai, Henrik AU - Homolya, Emese AU - Illés, Erzsébet AU - Kereszturi, Ákos AU - Mörtl, Mária AU - Pál, Bernadett AU - Sík, András AU - Tasnádi, Péter AU - Weidinger, Tamás TI - Folyadékok a Naprendszerben ET - 2 PB - ELTE TTK Kozmikus Anyagokat Vizsgáló Űrkutató Csoport CY - Budapest PY - 2023 SP - 87 SN - 9789638776754 DO - 10.21862/folyadekok2023 UR - https://m2.mtmt.hu/api/publication/33723641 ID - 33723641 N1 - Második, bővített kiadás. A 2010-es elektronikus kiadás (MTMT 1857063) frissített és bővített kiadása. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kobayashi, M. AU - Miyamoto, H. AU - Pál, Bernadett AU - Niihara, T. AU - Takemura, T. TI - Laboratory measurements show temperature-dependent permittivity of lunar regolith simulants JF - EARTH PLANETS AND SPACE J2 - EARTH PLANETS SPACE VL - 75 PY - 2023 IS - 1 SN - 1343-8832 DO - 10.1186/s40623-022-01757-5 UR - https://m2.mtmt.hu/api/publication/33637301 ID - 33637301 AB - The mapping of available water-ice is a crucial step in the lunar exploration missions. Ground penetrating radars have the potential to map the subsurface structure and the existence of water-ice in terms of the electromagnetic properties, specifically, the permittivity. Slight differences in permittivity can be significantly important when applied in a dry environment, such as on the Moon and Mars. The capability of detecting a small fraction of putative water-ice depends on the permittivity changes in terms of its dependent parameters, such as the frequency, the temperature, the porosity, and the chemical composition. Our work aims at mitigating false detection or overlooking of water-ce by considering their conditions that previous researches did not cover. We measured the permittivity of different lunar regolith relevant analogue samples with a fixed 40 % porosity in the ultra-high-frequency-super-high-frequency band. We used the coaxial probe method to measure anorthosite, basalt, dunite and ilmenite at 20 ∘C, -20 ∘C and -60 ∘C, and we find that, at -60 ∘C, the permittivity decreases about 6-18 % compared with the values at 20 ∘C . Within this temperature range, the permittivity is quite similar to the permittivity of water-ice. We find that the conventional calculation would overestimate the permittivity in the low temperature areas, such as the permanently shadowed regions. We also find that each component in the lunar regolith has different temperature-dependent permittivity, which might be important for radar data analysis to detect lunar polar water-ice. Our results also suggest that it should be possible to estimate the water-ice content from radar measurements at different temperatures given an appropriate method. LA - English DB - MTMT ER - TY - JOUR AU - Kereszturi, Ákos AU - Gyollai, Ildikó AU - Juhász, Zoltán AU - Pál, Bernadett AU - Rácz, Richárd Péter AU - Rezes, Dániel AU - Sulik, Béla TI - Review of meteorite irradiation tests to support next C-type asteroid missions JF - MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY J2 - MON NOT R ASTRON SOC VL - 519 PY - 2023 IS - 3 SP - 3947 EP - 3957 PG - 11 SN - 0035-8711 DO - 10.1093/mnras/stac3587 UR - https://m2.mtmt.hu/api/publication/33334427 ID - 33334427 AB - Effect of space weathering of airless asteroids could be better understood by artificial irradiation tests on meteorites in laboratories. This work surveys the infrared and Raman analysis based interpretation of simulated charged particle irradiation tests in order to better understand near future observational possibilities of asteroid visiting missions and also to support the planning of next missions and directions of detector improvement. Recent works properly targeted different meteors and meteor relevant minerals, evaluating bulk meteorite spectra, During the irradiation tests He+, (Ne+, Kr+) and Ar+ ions were used with fluxes characteristic for inner planetary system solar wind, considering 1-10 million year exposure durations. Although main meteorite minerals were irradiated and analysed, one missing aspect is that only bulk analysis have been done, not minerals separately in their original embedded context. Some Earth based mineral references were also analysed, however they might not necessary behave similar to the same type of reference minerals, and irradiation effect is poorly known for feldspar, troilite, magnetite. Darkening should be also further analysed for separate minerals too, together with the record of peak shape and position changes. Infrared ATR analysis might still provide such data in the future using the recently emerged technology, as well as Raman analysis - however for flyby missions’ infrared is the useful method while Raman can be used only at in-situ missions. The overview including the tables to support the identification of specific missing information related gaps in our current knowledge and directions for future research. LA - English DB - MTMT ER - TY - CONF AU - Kereszturi, Ákos AU - Miyamoto, H. AU - Pál, Bernadett TI - Flock of Low Cost Microlanders to Survey Liquid Water Potential on Mars Along the Receding Polar Cap T2 - Low-Cost Science Mission Concepts for Mars Exploration PY - 2022 UR - https://m2.mtmt.hu/api/publication/33110828 ID - 33110828 AB - Chain of micro-landers used only parachute driven deceleration could survey the temperature and humidity of the shallow subsurface zone on Mars along the receding springtime seasonal water ice cap edge. LA - English DB - MTMT ER - TY - CONF AU - Kisvárdai, I. AU - Pál, Bernadett AU - Kereszturi, Ákos TI - Investigating Pore Compaction Depth and the Habitability Potential of Icy Moons T2 - 53rd Lunar and Planetary Science Conference PY - 2022 UR - https://m2.mtmt.hu/api/publication/33110825 ID - 33110825 AB - We aim to estimate the pore compaction depth and the habitability potential of Enceladus using a simple model. LA - English DB - MTMT ER -