A5080499966- Astro and Planetary Science
- Planetary Science and Exploration
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Laser-induced spectroscopy and plasma
- Mass Spectrometry Techniques and Applications
- Isotope Analysis in Ecology
- Ion-surface interactions and analysis
- Atmospheric Ozone and Climate
- Stellar, planetary, and galactic studies
- Nuclear Physics and Applications
- Astrophysics and Star Formation Studies
- Space Exploration and Technology
- Spacecraft and Cryogenic Technologies
- Atomic and Molecular Physics
- Space Science and Extraterrestrial Life
- Geomagnetism and Paleomagnetism Studies
- Diamond and Carbon-based Materials Research
- Analytical chemistry methods development
- Fullerene Chemistry and Applications
- Spacecraft Design and Technology
- Geophysics and Gravity Measurements
- Plasma Diagnostics and Applications
- Scientific Research and Discoveries
- Atomic and Subatomic Physics Research
University of Bern
2016-2025
International Space Science Institute
2016-2025
Janssen (France)
2018
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2018
University of New Hampshire at Manchester
2012
Swedish Institute of Space Physics
2004-2011
University of New Hampshire
1998-2010
Institute of Space and Astronautical Science
2004-2010
Vikram Sarabhai Space Centre
2010
Centre National d'Études Spatiales
2004-2010
The Sun moves through the local interstellar medium, continuously emitting ionized, supersonic solar wind plasma and carving out a cavity in space called heliosphere. recently launched Interstellar Boundary Explorer (IBEX) spacecraft has completed its first all-sky maps of interaction at edge heliosphere by imaging energetic neutral atoms (ENAs) emanating from this region. We found bright ribbon ENA emission, unpredicted prior models or theories, that may be ordered magnetic field...
The detection of glycine and phosphorus in the coma 67P shows that comets contain all ingredients to help spark life on Earth.
The provenance of water and organic compounds on Earth other terrestrial planets has been discussed for a long time without reaching consensus. One the best means to distinguish between different scenarios is by determining deuterium-to-hydrogen (D/H) ratios in reservoirs comets Earth’s oceans. Here, we report direct situ measurement D/H ratio Jupiter family comet 67P/Churyumov-Gerasimenko ROSINA mass spectrometer aboard European Space Agency’s Rosetta spacecraft, which found be (5.3 ± 0.7)...
The Plasma and Suprathermal Ion Composition (PLASTIC) investigation provides the in situ solar wind low energy heliospheric ion measurements for NASA Solar Terrestrial Relations Observatory Mission, which consists of two spacecraft (STEREO-A, STEREO-B). PLASTIC-A PLASTIC-B are identical. Each PLASTIC is a time-of-flight/energy mass spectrometer designed to determine elemental composition, ionic charge states, bulk flow parameters major ions range from hydrogen iron. has nearly complete...
The Interstellar Boundary Explorer (IBEX) is a small explorer mission that launched on 19 October 2008 with the sole, focused science objective to discover global interaction between solar wind and interstellar medium. IBEX designed achieve this by answering four fundamental questions: (1) What strength structure of termination shock, (2) How are energetic protons accelerated at (3) properties flow beyond shock in heliotail, (4) does interact heliosphere heliopause? answers these questions...
Comets contain the best-preserved material from beginning of our planetary system. Their nuclei and comae composition reveal clues about physical chemical conditions during early solar system when comets formed. ROSINA (Rosetta Orbiter Spectrometer for Ion Neutral Analysis) onboard Rosetta spacecraft has measured coma comet 67P/Churyumov-Gerasimenko with well-sampled time resolution per rotation. Measurements were made over many rotation periods a wide range latitudes. These measurements...
The Solar Orbiter mission seeks to make connections between the physical processes occurring at Sun or in solar corona and nature of wind created by those which is subsequently observed spacecraft. also targets itself during its journey from source To meet specific science goals, will be equipped with both remote-sensing in-situ instruments unprecedented measurements atmosphere inner heliosphere. A crucial set provided Wind Analyser (SWA) suite instruments. This consists an Electron System...
Molecular nitrogen (N2) is thought to have been the most abundant form of in protosolar nebula. It main N-bearing molecule atmospheres Pluto and Triton probably reservoir from which giant planets formed. Yet comets, often considered primitive bodies solar system, N2 has not detected. Here we report direct situ measurement Jupiter family comet 67P/Churyumov-Gerasimenko, made by Rosetta Orbiter Spectrometer for Ion Neutral Analysis mass spectrometer aboard spacecraft. A N2/CO ratio (5.70 ±...
The origin of cometary matter and the potential contribution comets to inner-planet atmospheres are long-standing problems. During a series dedicated low-altitude orbits, Rosetta Orbiter Spectrometer for Ion Neutral Analysis (ROSINA) on spacecraft analyzed isotopes xenon in coma comet 67P/Churyumov-Gerasimenko. isotopic composition shows deficits heavy matches that primordial atmospheric component. present-day Earth atmosphere contains 22 ± 5% xenon, addition chondritic (or solar) xenon.
The Interstellar Mapping and Acceleration Probe (IMAP) is a revolutionary mission that simultaneously investigates two of the most important overarching issues in Heliophysics today: acceleration energetic particles interaction solar wind with local interstellar medium. While seemingly disparate, these are intimately coupled because accelerated inner heliosphere play critical roles outer heliospheric interaction. Selected by NASA 2018, IMAP planned to launch 2024. spacecraft simple...
ABSTRACT Comets are considered to be some of the most pristine and unprocessed Solar system objects accessible in situ exploration. Investigating their molecular elemental composition takes us on a journey back early period our possibly even further. In this work, we deduce bulk abundances major volatile species comet 67P/Churyumov-Gerasimenko, target European Space Agency’s (ESA) Rosetta mission. The basis measurements obtained with ROSINA instrument suite board orbiter during suitable high...
The Analyzer of Space Plasma and Energetic Atoms (ASPERA) on board the Mars Express spacecraft found that solar wind plasma accelerated ionospheric ions may be observed all way down to pericenter 270 kilometers above dayside planetary surface. This is very deep in ionosphere, implying direct exposure martian topside atmosphere forcing. low-altitude penetration energization due irregularities or perturbations, magnetic anomalies at Mars, both.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-yield synthesis, separation, and mass-spectrometric characterization of fullerenes C60 to C266Deborah Holmes Parker, Peter Wurz, Kuntal Chatterjee, Keith R. Lykke, Jerry E. Hunt, Michael J. Pellin, John C. Hemminger, Dieter M. Gruen, Leon StockCite this: Am. Chem. Soc. 1991, 113, 20, 7499–7503Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1 September...
Neutral atom imaging of the interstellar gas flow in inner heliosphere provides most detailed information on physical conditions surrounding medium (ISM) and its interaction with heliosphere. The Interstellar Boundary Explorer (IBEX) measured neutral H, He, O, Ne for three years. We compare He combined O+Ne distributions two passages 2009 2010 an analytical calculation, which is simplified because IBEX orientation observations at almost exactly perihelion trajectories. This method allows...
The dominant feature in Interstellar Boundary Explorer (IBEX) sky maps of heliospheric energetic neutral atom (ENA) flux is a ribbon enhanced that extends over broad range ecliptic latitudes and longitudes. It narrow (approximately 20 degrees average width) but long (extending 300 the sky) observed at energies from 0.2 to 6 kilo-electron volts. We demonstrate factor 2 3 times higher than more diffuse, globally distributed ENA flux. most pronounced approximately 1 volt. width nearly constant,...