scispace - formally typeset
Search or ask a question
Author

Eberhard Grün

Bio: Eberhard Grün is an academic researcher from Max Planck Society. The author has contributed to research in topics: Cosmic dust & Interplanetary dust cloud. The author has an hindex of 68, co-authored 414 publications receiving 15918 citations. Previous affiliations of Eberhard Grün include University of Hawaii & University of Colorado Boulder.


Papers
More filters
Journal ArticleDOI
01 May 1985-Icarus
TL;DR: In this article, a detailed analysis of the effects of mutual collisions (i.e., destruction of meteoroids and production of fragment particles) and of radiation pressure has been performed which yielded a new picture of the balance of the meteoritic complex.

932 citations

Journal ArticleDOI
15 May 1986-Nature
TL;DR: The mass spectra of cometary dust particles measured by the PIA dust particle analyzer aboard the Giotto spacecraft showed some unexpected and striking features as mentioned in this paper, such as small particles below 10 to the -14th g are much more abundant than anticipated by models.
Abstract: Mass spectra of cometary dust particles measured by the PIA dust particle analyzer aboard the Giotto spacecraft show some unexpected and striking features. First, small particles below 10 to the -14th g are much more abundant than anticipated by models. Second, most of the particles are rich in light elements such as H, C, N, and O, suggesting the validity of models that describe the cometary dust as including organic material. Third, the light elements specifically seem to have a low ratio of mass to volume. Three examples of original mass spectra showing typical compositions are given; these have been measured, and are compared with a computer-simulated mass spectrum.

411 citations

Journal ArticleDOI
01 Apr 1993-Nature
TL;DR: Within 1 AU from Jupiter, the Ulysses spacecraft during the flyby on February 8, 1992 recorded periodic bursts of submicron dust particles with durations ranging from several hours to two days and occurring at about monthly intervals.
Abstract: Within 1 AU from Jupiter, the dust detector aboard the Ulysses spacecraft during the flyby on February 8, 1992 recorded periodic bursts of submicron dust particles with durations ranging from several hours to two days and occurring at about monthly intervals. These particles arrived at Ulysses in collimate streams radiating from close to the line-of-sight direction to Jupiter, suggesting a Jovian origin for the periodic bursts. Ulysses also detected a flux of micron-sized dust particles moving in high-velocity retrograde orbits. These grains are identified here as being of interstellar origin.

393 citations

Journal ArticleDOI
Alessandra Rotundi1, Alessandra Rotundi2, Holger Sierks3, Vincenzo Della Corte2, Marco Fulle2, Pedro J. Gutiérrez4, Luisa Lara4, Cesare Barbieri, Philippe Lamy5, Rafael Rodrigo6, Rafael Rodrigo4, Detlef Koschny7, Hans Rickman8, Hans Rickman9, H. U. Keller10, José Juan López-Moreno4, Mario Accolla2, Mario Accolla1, Jessica Agarwal3, Michael F. A'Hearn11, Nicolas Altobelli7, Francesco Angrilli12, M. Antonietta Barucci13, Jean-Loup Bertaux14, Ivano Bertini12, Dennis Bodewits11, E. Bussoletti1, Luigi Colangeli15, M. Cosi16, Gabriele Cremonese2, Jean-François Crifo14, Vania Da Deppo, Björn Davidsson8, Stefano Debei12, Mariolino De Cecco17, Francesca Esposito2, M. Ferrari1, M. Ferrari2, Sonia Fornasier13, F. Giovane18, Bo Å. S. Gustafson19, Simon F. Green20, Olivier Groussin5, Eberhard Grün3, Carsten Güttler3, M. Herranz4, Stubbe F. Hviid21, Wing Ip22, Stavro Ivanovski2, José M. Jerónimo4, Laurent Jorda5, J. Knollenberg21, R. Kramm3, Ekkehard Kührt21, Michael Küppers7, Monica Lazzarin, Mark Leese20, Antonio C. López-Jiménez4, F. Lucarelli1, Stephen C. Lowry23, Francesco Marzari12, Elena Mazzotta Epifani2, J. Anthony M. McDonnell20, J. Anthony M. McDonnell23, Vito Mennella2, Harald Michalik, A. Molina24, R. Morales4, Fernando Moreno4, Stefano Mottola21, Giampiero Naletto, Nilda Oklay3, Jose Luis Ortiz4, Ernesto Palomba2, Pasquale Palumbo1, Pasquale Palumbo2, Jean-Marie Perrin14, Jean-Marie Perrin25, J. E. Rodriguez4, L. Sabau26, Colin Snodgrass20, Colin Snodgrass3, Roberto Sordini2, Nicolas Thomas27, Cecilia Tubiana3, Jean-Baptiste Vincent3, Paul R. Weissman28, K. P. Wenzel7, Vladimir Zakharov13, John C. Zarnecki6, John C. Zarnecki20 
23 Jan 2015-Science
TL;DR: In this article, the GIADA (Grain Impact Analyser and Dust Accumulator) experiment on the European Space Agency's Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko was used to detect 35 outflowing grains of mass 10−10 to 10−7 kilograms.
Abstract: Critical measurements for understanding accretion and the dust/gas ratio in the solar nebula, where planets were forming 4.5 billion years ago, are being obtained by the GIADA (Grain Impact Analyser and Dust Accumulator) experiment on the European Space Agency’s Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko. Between 3.6 and 3.4 astronomical units inbound, GIADA and OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) detected 35 outflowing grains of mass 10−10 to 10−7 kilograms, and 48 grains of mass 10−5 to 10−2 kilograms, respectively. Combined with gas data from the MIRO (Microwave Instrument for the Rosetta Orbiter) and ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) instruments, we find a dust/gas mass ratio of 4 ± 2 averaged over the sunlit nucleus surface. A cloud of larger grains also encircles the nucleus in bound orbits from the previous perihelion. The largest orbiting clumps are meter-sized, confirming the dust/gas ratio of 3 inferred at perihelion from models of dust comae and trails.

373 citations

Journal ArticleDOI
10 Mar 2006-Science
TL;DR: During Cassini's close flyby of Enceladus on 14 July 2005, the High Rate Detector of the Cosmic Dust Analyzer registered micron-sized dust particles enveloping this satellite; this asymmetric signature is consistent with a locally enhanced dust production in the south polar region of Encesladus.
Abstract: During Cassini's close flyby of Enceladus on 14 July 2005, the High Rate Detector of the Cosmic Dust Analyzer registered micron-sized dust particles enveloping this satellite. The dust impact rate peaked about 1 minute before the closest approach of the spacecraft to the moon. This asymmetric signature is consistent with a locally enhanced dust production in the south polar region of Enceladus. Other Cassini experiments revealed evidence for geophysical activities near Enceladus' south pole: a high surface temperature and a release of water gas. Production or release of dust particles related to these processes may provide the dominant source of Saturn's E ring.

306 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: Gaia as discussed by the authors is a cornerstone mission in the science programme of the European Space Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach.
Abstract: Gaia is a cornerstone mission in the science programme of the EuropeanSpace Agency (ESA). The spacecraft construction was approved in 2006, following a study in which the original interferometric concept was changed to a direct-imaging approach. Both the spacecraft and the payload were built by European industry. The involvement of the scientific community focusses on data processing for which the international Gaia Data Processing and Analysis Consortium (DPAC) was selected in 2007. Gaia was launched on 19 December 2013 and arrived at its operating point, the second Lagrange point of the Sun-Earth-Moon system, a few weeks later. The commissioning of the spacecraft and payload was completed on 19 July 2014. The nominal five-year mission started with four weeks of special, ecliptic-pole scanning and subsequently transferred into full-sky scanning mode. We recall the scientific goals of Gaia and give a description of the as-built spacecraft that is currently (mid-2016) being operated to achieve these goals. We pay special attention to the payload module, the performance of which is closely related to the scientific performance of the mission. We provide a summary of the commissioning activities and findings, followed by a description of the routine operational mode. We summarise scientific performance estimates on the basis of in-orbit operations. Several intermediate Gaia data releases are planned and the data can be retrieved from the Gaia Archive, which is available through the Gaia home page.

5,164 citations

Journal ArticleDOI
01 Nov 1996-Icarus
TL;DR: In this article, the authors presented a self-consistent, interactive simulation of the formation of the giant planets, in which for the first time both the gas and planetesimal accretion rates were calculated in a selfconsistent and interactive fashion.

2,931 citations

Journal ArticleDOI
TL;DR: In this paper, the authors construct size distributions for carbonaceous and silicate grain populations in different regions of the Milky Way, LMC, and SMC, and adopt a fairly simple functional form for the size distribution, characterized by several parameters.
Abstract: We construct size distributions for carbonaceous and silicate grain populations in different regions of the Milky Way, LMC, and SMC. The size distributions include sufficient very small carbonaceous grains (including polycyclic aromatic hydrocarbon molecules) to account for the observed infrared and microwave emission from the diffuse interstellar medium. Our distributions reproduce the observed extinction of starlight, which varies depending on the interstellar environment through which the light travels. As shown by Cardelli, Clayton, and Mathis in 1989, these variations can be roughly parameterized by the ratio of visual extinction to reddening, RV. We adopt a fairly simple functional form for the size distribution, characterized by several parameters. We tabulate these parameters for various combinations of values for RV and bC, the C abundance in very small grains. We also find size distributions for the line of sight to HD 210121 and for sight lines in the LMC and SMC. For several size distributions, we evaluate the albedo and scattering asymmetry parameter and present model extinction curves extending beyond the Lyman limit.

2,667 citations

Journal ArticleDOI
TL;DR: In this article, the authors survey the observed properties of interstellar dust grains: the wavelength-dependent extinction of starlight, including absorption features, from UV to infrared; optical luminescence; and optical luminance.
Abstract: ▪ Abstract This review surveys the observed properties of interstellar dust grains: the wavelength-dependent extinction of starlight, including absorption features, from UV to infrared; optical lum...

2,288 citations

Journal ArticleDOI
TL;DR: In this paper, a balance of dust particle inertia and plasma pressure is investigated and it is shown that these waves can propagate linearly as a normal mode in a dusty plasma, and non-linearly as supersonic solitons of either positive or negative electrostatic potential.

1,940 citations