Search Publications
Survey of 1-Hz waves in the near-Venusian space: Venus Express observations
Zhang, T. L.; Chen, Y. Q.; Wang, G. Q. +2 more
With 32 Hz magnetic field data of Venus Express from May 2006 to August 2012, the global spatial distributions of 1-Hz waves in the near-Venusian space are presented in this paper. The occurrence rate of 1-Hz waves is maximized near the Venusian bow shock and decreases in the upstream with the distance away from the shock. Downstream of Venusian b…
Frontal Aureole Deposit on Acheron Fossae ridge as evidence for landslide-generated tsunami on Mars
De Blasio, Fabio Vittorio
The recurrent failures of the 8 to 10-km high basal scarp of the Olympus Mons volcano on Mars has resulted in enormous landslides merging into a composite deposit known as the aureole. The largest of these landslides, the western (W) aureole, appears as a hummocky and extensive tongue reaching the distance of 700 km from the present Olympus Mons e…
Electron dynamics near diamagnetic regions of comet 67P/Churyumov- Gerasimenko
Goldstein, R.; Mokashi, P.; Richter, I. +8 more
The Rosetta spacecraft detected transient and sporadic diamagnetic regions around comet 67P/Churyumov-Gerasimenko. In this paper we present a statistical analysis of bulk and suprathermal electron dynamics, as well as a case study of suprathermal electron pitch angle distributions (PADs) near a diamagnetic region. Bulk electron densities are corre…
Improved calibrations of the stellar occultation data accumulated by the SPICAV UV onboard Venus Express
Montmessin, Franck; Bertaux, Jean-Loup; Korablev, Oleg +2 more
Stellar occultation is a powerful method to study vertical structure of the Venus night mesosphere. The UV channel of SPICAV spectrometer, operated in 2006-2014 on board ESA's Venus Express orbiter, allowed retrieval profiles of atmospheric gases (CO2, SO2, and O3) and aerosols. It was also able to register differe…
The Zelima asteroid family: Resonant configuration and rotational fission clusters
Carruba, V.; Ribeiro, J. V.
Asteroid families are groups of asteroids that are identifiable in domains of proper elements. They may be the outcome of a collision, or the product of rotational fission. Among collisional families, young asteroid families are of interest because they preserve information on the original ejection velocity field with which the asteroid fragments …
The correlation length of ULF waves around Venus: VEX observations
Fränz, M.; Zhang, T. L.; Bolzan, M. J. A. +2 more
A study of the correlation length of ultra-low frequency (ULF) waves around Venus was developed using electron density and magnetic field data obtained from the Analyzer of Space Plasmas and Energetic Atoms (ASPERA-4) and magnetometer (MAG), respectively, on board of the mission Venus Express (VEX). The analysis was conducted using the whole inter…
Micro- and nanolander on the surface of Ryugu - Commonalities, differences and lessons learned for future microgravity exploration
Ulamec, Stephan; Ho, Tra-Mi; Lange, Caroline +2 more
Recent Space missions to the small bodies in our Solar System have shown an increasing importance of in-situ investigations. Philae, the comet lander of the ESA Rosetta mission performed the first landing on such a small body and its results clearly enhanced the overall scientific output of the Rosetta mission. While Philae was a rather heavy (~10…
Dust extinction towards the type Ia supernova 2012cu in NGC 4772
Gao, Jian; Jiang, Biwei; Li, Jun +2 more
Using photometric and spectroscopic data of Supernova (SN) 2012cu, a fairly reddened type Ia supernova, we derived its color excess curves and probed the dust extinction in its host galaxy, NGC 4772. In order to derive the extinction as a function of wavelength (i.e., Aλ), we model the color excess curves of SN 2012cu in terms of dust m…
Spin pairs in the Koronis asteroid family
Carruba, V.; Aljbaae, S.; Martins, B. +4 more
Asteroid groups may either form because of collisions or the rotational failure of a parent body. Collisional asteroid families tend to be more spread in proper element domains, while young spin clusters are usually much more compact. Recently, it has been shown that young spin clusters may form at higher rates in extremely young asteroid families…
Electrical properties of cometary dust particles derived from line shapes of TOF-SIMS spectra measured by the ROSETTA/COSIMA instrument
Langevin, Yves; Fischer, Henning; Koch, Andreas +21 more
Between Aug. 2014 and Sept. 2016, while ESA's cornerstone mission Rosetta was operating in the vicinity of the nucleus and in the coma of comet 67P/Churyumov-Gerasimenko, the COSIMA instrument collected a large number of dust particles with diameters up to a millimeter. Positive or negative ions were detected by a time-of-flight secondary ion mass…