In-Situ Mass Spectrometry of Atmosphereless Planetary Objects

Mass Spectrometry of Atmosphereless Planetary Objects

Max-Planck-Institut für Kernphysik, Heidelberg, Germany LASP, University of Colorado, Boulder, CO, USA Institut fuer Planetologie, Westfälische Wilhelms-Universität, Münster, Germany IGEP, Universität Braunschweig, Braunschweig, Germany Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany Institut für Raumfahrtsysteme, Universität Stuttgart, Germany Department of the Geophy...

Cr (VI)/Cr (III) SPECIATION BY IN SITU ELECTRODEPOSITION ONTO TUBE PRIOR TO ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY

Unambiguous quasar microlensing

Microlensing studies of quasars can reveal dark matter lumps over a broad mass spectrum; we highlight the importance of monitoring quasars which are seen through the halos of low-redshift galaxies. For these configurations microlensing by planetary-mass objects will manifest itself as isolated events which are only weakly chromatic. Statistical comparison of the observed optical depths with the...

Dating the Martian meteorite Zagami by the 87Rb-87Sr isochron method with a prototype in situ resonance ionization mass spectrometer

RATIONALE The geologic history of the Solar System builds on an extensive record of impact flux models, crater counts, and ~270 kg of lunar samples analyzed in terrestrial laboratories. However, estimates of impactor flux may be biased by the fact that most of the dated Apollo samples were only tenuously connected to an assumed geologic context. Moreover, uncertainties in the modeled cratering ...

The Substellar Mass Function in σ Orionis

We combine results from imaging searches for substellar objects in the σ Orionis cluster and follow-up photometric and spectroscopic observations to derive a census of the brown dwarf population in a region of 847 arcmin 2. We identify 64 very low-mass cluster member candidates in this region. We – 2 – have available three color (IZ and J) photometry for all of them, spectra for 9 objects, and ...