56 citations · 229 across the 15 of their papers we have counts for
15 papers · 1 filter
Dust Emission and Dynamics
Jessica Agarwal, Yoonyoung Kim, Michael S. P. Kelley +1
When viewed from Earth, most of what we observe of a comet is dust. The influence of solar radiation pressure on the trajectories of dust particles depends on their cross-section t…
Neutral gas coma dynamics: modeling of flows and attempts to link inner coma structures to properties of the nucleus
Raphael Marschall, Björn J. R. Davidsson, Martin Rubin +1
Deriving properties of cometary nuclei from coma data is of significant importance for our understanding of cometary activity and has implications beyond. Ground-based data represe…
An inflationary disk phase to explain extended protoplanetary dust disks
Raphael Marschall, Alessandro Morbidelli
Understanding planetesimal formation is an essential first step to understanding planet formation. The distribution of these first solid bodies will drive the locations where plane…
Activity distribution of comet 67P/Churyumov-Gerasimenko from combined measurements of non-gravitational forces and torques
Nicholas Attree, Laurent Jorda, Olivier Groussin +5
Aims. Understanding the activity is vital for deciphering the structure, formation, and evolution of comets. We investigate models of cometary activity by comparing them to the dyn…
Implications for the collisional strength of Jupiter Trojans from the Eurybates family
Raphael Marschall, David Nesvorný, Rogerio Deienno +3
In this work, we model the collisional evolution of the Jupiter Trojans and determined under which conditions the Eurybates-Queta system survives. We show that the collisional stre…
Determining the dust environment of an unknown comet for a spacecraft fly-by: The case of ESA's Comet Interceptor mission
Raphael Marschall, Vladimir Zakharov, Cecilia Tubiana +12
We present a statistical approach to assess the dust environment for a yet unknown comet (or when its parameters are known only with large uncertainty). This is of particular impor…
Binary Planetesimal Formation from Gravitationally Collapsing Pebble Clouds
David Nesvorny, Rixin Li, Jacob B. Simon +4
Planetesimals are compact astrophysical objects roughly 1-1000 km in size, massive enough to be held together by gravity. They can grow by accreting material to become full-size pl…
The dust-to-gas ratio, size distribution, and dust fall-back fraction of comet 67P/Churyumov-Gerasimenko: Inferences from linking the optical and dynamical properties of the inner comae
Raphael Marschall, Johannes Markkanen, Selina-Barbara Gerig +3
In this work, we present results that simultaneously constrain the dust size distribution, dust-to-gas ratio, fraction of dust re-deposition, and total mass production rates for co…
Stability of Jovian Trojans and their collisional families
Timothy R. Holt, David Nesvorny, Jonathan Horner +6
The Jovian Trojans are two swarms of objects located around the L and L Lagrange points. The population is thought to have been captured by Jupiter during the Solar system'…
Limitations in the determination of surface emission distributions on comets through modelling of observational data -- A case study based on Rosetta observations
Raphael Marschall, Ying Liao, Nicolas Thomas +1
The European Space Agency's (ESA) Rosetta mission has returned a vast data set of measurements of the inner gas coma of comet 67P/Churyumov-Gerasimenko. These measurements have bee…
Superparticle Method for Simulating Collisions
David Nesvorny, Andrew N. Youdin, Raphael Marschall +1
For problems in astrophysics, planetary science and beyond, numerical simulations are often limited to simulating fewer particles than in the real system. To model collisions, the…
Migrating Scarps as a Significant Driver for Cometary Surface Evolution
Samuel Birch, Alexander Hayes, Orkan Umurhan +10
Rosetta observations of 67P/Churyumov-Gerasimenko (67P) reveal that most changes occur in the fallback-generated smooth terrains, vast deposits of granular material blanketing the…
Diurnal variation of dust and gas production in comet 67P/Churyumov-Gerasimenko at the inbound equinox as seen by OSIRIS and VIRTIS-M on board Rosetta
C. Tubiana, G. Rinaldi, C. Güttler +53
On 27 Apr 2015, when 67P/C-G was at 1.76 au from the Sun and moving towards perihelion, the OSIRIS and VIRTIS-M instruments on Rosetta observed the evolving dust and gas coma durin…
Local manifestations of cometary activity
Jean-Baptiste Vincent, Tony Farnham, Ekkehard Kührt +5
Comets are made of volatile and refractory material and naturally experience various degrees of sublimation as they orbit around the Sun. This gas release, accompanied by dust, rep…
Constraining spatial pattern of early activity of comet 67P/C-G with 3D modeling of the MIRO observations
Y. Zhao, L. Rezac, P. Hartogh +3
Our aim is to investigate early activity (July 2014) of 67P/CG with 3D coma and radiative transfer modeling of MIRO measurements, accounting for nucleus shape, illumination, and or…