Institution
International Space Science Institute
Nonprofit•Bern, Switzerland•
About: International Space Science Institute is a nonprofit organization based out in Bern, Switzerland. It is known for research contribution in the topics: Solar wind & Comet. The organization has 120 authors who have published 858 publications receiving 25772 citations. The organization is also known as: ISSI.
Topics: Solar wind, Comet, Stars, Galaxy, Population
Papers published on a yearly basis
Papers
More filters
••
National Central University1, University of Padua2, Macau University of Science and Technology3, University of Bern4, Ames Research Center5, Max Planck Society6, Aix-Marseille University7, International Space Science Institute8, Spanish National Research Council9, European Space Research and Technology Centre10, Uppsala University11, Braunschweig University of Technology12, University of Maryland, College Park13, Pierre-and-Marie-Curie University14, INAF15, University of Trento16, German Aerospace Center17, European Space Agency18
TL;DR: In this paper, the authors provide geomorphological maps of the Southern hemisphere of the comet 67P/Churyumov-Gerasimenko with the distinction of both geological units and linear features.
Abstract: In 2015 May, the Southern hemisphere of comet 67P/Churyumov–Gerasimenko became visible by the OSIRIS cameras on-board the Rosetta spacecraft. The resolution was high enough to carry out a detailed analysis of the surface morphology, which is quite different from the Northern hemisphere. Previous works show that fine particle deposits are the most extensive geological unit in the Northern hemisphere. In contrast, the Southern hemisphere is dominated by outcropping consolidated terrain. In this work, we provide geomorphological maps of the Southern hemisphere with the distinction of both geological units and linear features. The geomorphological maps described in this study allow us to gain a better understanding of the processes shaping the comet nucleus and the distribution of primary structures such as fractures and strata.
28 citations
••
TL;DR: Based on Data Release 1 of the VISTA Variables in the V\'ia L\'actea survey, the authors have discovered four new, faint and heavily reddened OC Cepheids, including the longest-period OC cepheid known, ASAS J180342$-$2211.0 in Teutsch 14a.
Abstract: Classical Cepheids are among the most useful Galactic and nearby extragalactic distance tracers because of their well-defined period--luminosity relations (PLRs). Open cluster (OC) Cepheids are important objects to independently calibrate these PLRs. Based on Data Release 1 of the {\sl VISTA} Variables in the V\'ia L\'actea survey, we have discovered four new, faint and heavily reddened OC Cepheids, including the longest-period OC Cepheid known, ASAS J180342$-$2211.0 in Teutsch 14a. The other OC--Cepheid pairs include NGC 6334 and V0470 Sco, Majaess 170 and ASAS J160125$-$5150.3, and Teutsch 77 and BB Cen. ASAS J180342$-$2211.0, with a period of $\log P = 1.623$ [days] is important to constrain the slope of the PLR. The currently most complete $JHK_{\rm s}$ Galactic Cepheid PLRs are obtained based on a significantly increased sample of 31 OC Cepheids, with associated uncertainties that are improved by 40 per cent compared with previous determinations (in the $J$ band). The NIR PLRs are in good agreement with previous PLRs determined based on other methods.
28 citations
••
INAF1, Spanish National Research Council2, Max Planck Society3, Parthenope University of Naples4, International Space Science Institute5, European Space Research and Technology Centre6, Polish Academy of Sciences7, Braunschweig University of Technology8, Centre national de la recherche scientifique9, University of Trento10, Paris Diderot University11, Instituto Nacional de Técnica Aeroespacial12
TL;DR: In this article, the rotational and translational motion of rotating aspherical dust grains with different cross sections in flow conditions corresponding to the coma of 67P/Churyumov-Gerasimenko qualitatively and quantitatively was analyzed.
Abstract: Context. During September and October 2014, the OSIRIS cameras onboard the ESA Rosetta mission detected millions of single particles. Many of these dust particles appear as long tracks (due to both the dust proper motion and the spacecraft motion during the exposure time) with a clear brightness periodicity. Aims. We interpret the observed periodic features as a rotational and translational motion of aspherical dust grains. Methods. By counting the peaks of each track, we obtained statistics of a rotation frequency. We compared these results with the rotational frequency predicted by a model of aspherical dust grain dynamics in a model gas flow. By testing many possible sets of physical conditions and grain characteristics, we constrained the rotational properties of dust grains. Results. We analyzed on the motion of rotating aspherical dust grains with different cross sections in flow conditions corresponding to the coma of 67P/Churyumov-Gerasimenko qualitatively and quantitatively. Based on the OSIRIS observations, we constrain the possible physical parameters of the grains.
28 citations
••
TL;DR: The origin of the Moon by a giant impact is currently the most widely accepted theory of lunar origin this paper, which is consistent with the major lunar observations: its exceptionally large size relative to the host planet, the high angular momentum of the Earth-Moon system, the extreme depletion of volatile elements, and the delayed accretion, quickly followed by the formation of a global crust and mantle.
Abstract: An origin of the Moon by a Giant Impact is presently the most widely accepted theory of lunar origin. It is consistent with the major lunar observations: its exceptionally large size relative to the host planet, the high angular momentum of the Earth–Moon system, the extreme depletion of volatile elements, and the delayed accretion, quickly followed by the formation of a global crust and mantle.
28 citations
••
Harvard University1, INAF2, University of Geneva3, University of St Andrews4, University of California, Berkeley5, University of Hawaii6, University of Birmingham7, Aarhus University8, University of Sydney9, University of Edinburgh10, University of Porto11, Yale University12, Iowa State University13, International Space Science Institute14
TL;DR: In this paper, the authors estimate the stellar temperature to be 5687 +/- 50 K, its metallicity to be [m/H] = 0.32 +/- 0.08, and the projected rotational velocity to be v sin i 10 years and mass > 12.1M_J.
Abstract: Kepler-454 (KOI-273) is a relatively bright (V = 11.69 mag), Sun-like starthat hosts a transiting planet candidate in a 10.6 d orbit. From spectroscopy, we estimate the stellar temperature to be 5687 +/- 50 K, its metallicity to be [m/H] = 0.32 +/- 0.08, and the projected rotational velocity to be v sin i 10 years and mass >12.1M_J . The twelve exoplanets with radii <2.7 R_Earth and precise mass measurements appear to fall into two populations, with those <1.6 R_Earth following an Earth-like composition curve and larger planets requiring a significant fraction of volatiles. With a density of 2.76 +/- 0.73 g cm-3, Kepler-454b lies near the mass transition between these two populations and requires the presence of volatiles and/or H/He gas.
28 citations
Authors
Showing all 122 results
Name | H-index | Papers | Citations |
---|---|---|---|
Franz E. Bauer | 118 | 939 | 58465 |
Gilles Chabrier | 95 | 384 | 40066 |
Tamas I. Gombosi | 84 | 612 | 26497 |
André Balogh | 81 | 546 | 22494 |
Isabelle Baraffe | 72 | 287 | 21612 |
Anny Cazenave | 72 | 276 | 20198 |
Travis S. Metcalfe | 70 | 239 | 17016 |
Mark Sargent | 66 | 217 | 14925 |
Nathan A. Schwadron | 65 | 495 | 16768 |
G. Paschmann | 61 | 185 | 15887 |
Joachim Wambsganss | 59 | 310 | 13732 |
J. Geiss | 56 | 191 | 9427 |
Tilman Spohn | 56 | 195 | 9042 |
Lennart Bengtsson | 55 | 210 | 13109 |
Rudolf A. Treumann | 50 | 311 | 9004 |