A5080285440- Astro and Planetary Science
- Planetary Science and Exploration
- Space Exploration and Technology
- Spacecraft and Cryogenic Technologies
- Astrophysics and Star Formation Studies
- High-pressure geophysics and materials
- Stellar, planetary, and galactic studies
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Scientific Research and Discoveries
- Space Science and Extraterrestrial Life
- Marine and environmental studies
- Spacecraft Design and Technology
- Spaceflight effects on biology
- Cryospheric studies and observations
- Atmospheric Ozone and Climate
- Climate change and permafrost
- Astronomical and nuclear sciences
- Hydrocarbon exploration and reservoir analysis
- Landslides and related hazards
- Gamma-ray bursts and supernovae
- earthquake and tectonic studies
- Radioactive Decay and Measurement Techniques
- Isotope Analysis in Ecology
- Crystallization and Solubility Studies
University of Warsaw
2015-2024
Institute of Geophysics
2009-2023
Max Planck Institute for Solar System Research
1998-2014
Max Planck Society
1998-2005
Max Planck Institute for Astronomy
1999-2001
Thermal and mechanical material properties determine comet evolution even solar system formation because comets are considered remnant volatile-rich planetesimals. Using data from the Multipurpose Sensors for Surface Sub-Surface Science (MUPUS) instrument package gathered at Philae landing site Abydos on 67P/Churyumov-Gerasimenko, we found diurnal temperature to vary between 90 130 K. The surface emissivity was 0.97, local thermal inertia 85 ± 35 J m(-2) K(-1)s(-1/2). MUPUS probe did not...
From the operation of MUPUS thermal probe Spohn et al. (2015) concluded that material nucleus 67P/Churyumov–Gerasimenko is likely to have a high strength, at least locally Philae landing site. In this work we consider derived strength in order constrain its granulation. For purpose performed numerical simulations long-term sintering ice–dust granular mixtures different granulation, covered by dust mantle. The mantle has thickness 0–16 cm, and (pore size temperature-dependent) conductivity....
In this paper we presented the results of laboratory experiments dealing with sliding desiccated sand on inclined surfaces cometary analogs. The were performed in a vacuum, using porous mixtures water ice and quartz sand. inclination angle samples was about 10 degrees lower than repose angle. possible when mobility coefficient defined as ratio forces unity i.e. layer whole not fluidized. observed effect due to rolling, or grains present surface. It is important, that process can be caused by...
We present a minimal model for the global carbon cycle of Earth containing reservoirs mantle, ocean floor, continental crust, biosphere, and kerogen, as well aggregated reservoir atmosphere. This is coupled to parameterised mantle convection describing thermal degassing history Earth. In this study evolution mean surface temperature, biomass, sizes over whole future under maturing Sun investigated. obtain reasonable values distribution in find that parameterisation hydrothermal flux pH past...
The paper presents experimental studies on the degassing of porous ice and mixtures sand in a vacuum. study aims to find relationship between surface recession rate subsurface temperature gradient as well granulation composition material. We propose an empirical equation tested samples with mass fraction non-volatile material range 0–3.65. Based proposed equation, calculations were carried out, which indicate possibility landslides inclined areas comet 9P/Tempel 1.