Publications (25)
Tensile Strength of 67P/Churyumov-Gerasimenko Nucleus Material from Overhangs
N. Attree, O. Groussin, L. Jorda +52
We directly measure twenty overhanging cliffs on the surface of comet 67P/Churyumov-Gerasimenko extracted from the latest shape model and estimate the minimum tensile strengths nee…
Detection of a Satellite of the Trojan Asteroid (3548) Eurybates -- A Lucy Mission Target
K. S. Noll, M. E. Brown, H. A. Weaver +8
We describe the discovery of a satellite of the Trojan asteroid (3548) Eurybates in images obtained with the Hubble Space Telescope. The satellite was detected on three separate ep…
Comet 67P/Churyumov-Gerasimenko: Constraints on its origin from OSIRIS observations
H. Rickman, S. Marchi, M. F. A'Hearn +12
One of the main aims of the ESA Rosetta mission is to study the origin of the solar system by exploring comet 67P/Churyumov-Gerasimenko at close range. In this paper we discuss the…
The Cratering History of Asteroid (21) Lutetia
S. Marchi, M. Massironi, J. -B. Vincent +9
The European Space Agency's Rosetta spacecraft passed by the main belt asteroid (21) Lutetia the 10th July 2010. With its ~100km size, Lutetia is one of the largest asteroids ever…
A re-assessment of the Kuiper belt size distribution for sub-kilometer objects, revealing collisional equilibrium at small sizes
A. Morbidelli, D. Nesvorny, W. F. Bottke +1
We combine several constraints provided by the crater records on Arrokoth and the worlds of the Pluto system to compute the size-frequency distribution (SFD) of the crater producti…
A Crater Chronology for the Jupiter's Asteroids
S. Marchi, D. Nesvorný, D. Vokrouhlický +2
We present a new crater chronology for Jupiter's Trojan asteroids. This tool can be used to interpret the collisional history of the bodies observed by NASA's Lucy mission. The Luc…
The timeline of the Lunar bombardment - revisited
A. Morbidelli, D. Nesvorny, V. Laurenz +5
The timeline of the lunar bombardment in the first Gy of the Solar System remains unclear. Some basin-forming impacts occurred 3.9-3.7Gy ago. Many other basins formed before, but t…
Heating of near-Earth objects and meteoroids due to close approaches to the Sun
S. Marchi, M. Delbo', A. Morbidelli +2
It is known that near-Earth objects (NEOs) during their orbital evolution may often undergo close approaches to the Sun. Indeed it is estimated that up to ~70% of them end their or…
The orbit and density of the Jupiter Trojan satellite system Eurybates-Queta
M. E. Brown, H. F. Levison, K. S. Noll +8
We report observations of the Jupiter Trojan asteroid (3548) Eurybates and its satellite Queta with the Hubble Space Telescope and use these observations to perform an orbital fit…
Footprints of a possible Ceres asteroid paleo-family
V. Carruba, D. Nesvorný, S. Marchi +1
Ceres is the largest and most massive body in the asteroid main belt. Observational data from the Dawn spacecraft reveal the presence of at least two impact craters about 280~km in…
Type II Supernovae as Distance Indicators at Near-IR Wavelengths
Ã. RodrÃguez, G. Pignata, M. Hamuy +13
Motivated by the advantages of observing at near-IR wavelengths, we investigate Type II supernovae (SNe II) as distance indicators at those wavelengths through the Photospheric Mag…
I. Collisional evolution and reddening of asteroid surfaces: The problem of conflicting timescales and the role of size-dependent effects
S. Marchi, P. Paolicchi, D. C. Richardson
Space weathering is the generic term used for processes that modify the optical properties of surfaces of atmosphereless rocky bodies under exposure to the space environment. The g…
On the puzzle of space weathering alteration of basaltic asteroids
S. Marchi, M. C. De Sanctis, M. Lazzarin +1
The majority of basaltic asteroids are found in the inner main belt, although a few have also been observed in the outer main belt and near-Earth space. These asteroids -referred t…
On the various origins of close-in extrasolar planets
S. Marchi, S. Ortolani, M. Nagasawa +1
The extrasolar planets (EPs) so far detected are very different to the planets in our own Solar System. Many of them have Jupiter-like masses and close-in orbits (the so-called hot…
Gravitational slopes, geomorphology, and material strengths of the nucleus of comet 67P/Churyumov-Gerasimenko from OSIRIS observations
O. Groussin, L. Jorda, A. -T. Auger +49
We study the link between gravitational slopes and the surface morphology on the nucleus of comet 67P/Churyumov-Gerasimenko and provide constraints on the mechanical properties of…
The effects of the target material properties and layering on the crater chronology: the case of Raditladi and Rachmaninoff basins on Mercury
S. Marchi, M. Massironi, G. Cremonese +3
In this paper we present a crater age determination of several terrains associated with the Raditladi and Rachmaninoff basins. These basins were discovered during the first and thi…
Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko
O. Groussin, H. Sierks, C. Barbieri +45
We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko, in the smooth terrains of the Imhotep region.…
Field Camera Unit for WSO-UV: Phase A Study Report
I. Pagano, F. Bacciotti, L. Bedin +33
World Space Observatory UltraViolet (WSO-UV) is a multipurpose space observatory, made by a 170 cm aperture telescope, capable of UV high-resolution spectroscopy, long slit low-res…
Transparent and conductive graphene oxide-polyethylenglycol diacrylate coatings obtained by photopolymerization
M. Sangermano, S. Marchi, L. Valentini +2
Water dispersed graphene oxide sheets were used to prepare graphene-polyethylenglycol diacrylate resin composites by photopolymerization. It was found that graphene sheets undergo…
Mercury's geochronology revised by applying Model Production Functions to Mariner 10 data: geological implications
M. Massironi, G. Cremonese, S. Marchi +3
Model Production Function chronology uses dynamic models of the Main Belt Asteroids (MBAs) and Near Earth Objects (NEOs) to derive the impactor flux to a target body. This is conve…
Inhomogeneities on the surface of 21 Lutetia, the asteroid target of the Rosetta mission
D. Perna, E. Dotto, M. Lazzarin +6
CONTEXT: In July 2010 the ESA spacecraft Rosetta will fly-by the main belt asteroid 21 Lutetia. Several observations of this asteroid have been so far performed, but its surface co…
The Cratering History of Asteroid (2867) Steins
S. Marchi, C. Barbieri, M. Kueppers +8
The cratering history of main belt asteroid (2867) Steins has been investigated using OSIRIS imagery acquired during the Rosetta flyby that took place on the 5th of September 2008.…
A new chronology for the Moon and Mercury
S. Marchi, S. Mottola, G. Cremonese +2
In this paper we present a new method for dating the surface of the Moon, obtained by modeling the incoming flux of impactors and converting it into a size distribution of resultin…
Trails of Solar System Minor Bodies on WFC/ACS Images
S. Marchi, Y. Momany, L. R. Bedin
In this paper we analyse very short arcs of minor bodies of the Solar System detected on Hubble Space Telescope (HST) Wide Field Channel ACS images. In particular, we address how t…
Small crater populations on Vesta
S. Marchi, W. F. Bottke, D. P. O'Brien +7
The NASA Dawn mission has extensively examined the surface of asteroid Vesta, the second most massive body in the main belt. The high quality of the gathered data provides us with…