CARRY , Benoît

The ESA Euclid mission has been designed to map the geometry of thedark Universe. Scheduled for launch in 2020, it will conduct asix-years visible and near-infrared imaging and spectroscopic surveyover 15,000 deg ^{2} down to V_{AB}˜24.5. Although the survey will avoidecliptic latitudes below 15°, the survey pattern in repeated sequencesof four...

The asteroid main belt between Mars and Jupiter holds evidences fromthe early Solar System history. Built from the originally thin andstratified accretion disk, it has been scrambled by planetary migrations,resulting in a dynamical excitement and radial mixing of compositions.Since the 1970s,spectral surveys have characterized the surface...

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The space astrometry Gaia mission is operating since July 2014 (Gaia Collaboration; Brown, A. et al., 2016; Gaia Collaboration; Prusti, T et al., 2016). As planned, Gaia detects many moving objects in its fields of view during its scanning process of the sky. Several months were necessary to tune the different parameters for filtering these...

The study of the physical properties of asteroids, spin and 3-D shape, is the first step in understanding their formation and the mechanisms that dictate their evolution. The 3-D shape is indeed required to compute precisely the density, the only quantity that tells us about the internal structure from remote sensing, which is at the crux of...

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Knowing the asteroid belt is the key to provide a reliable history ofour solar system. The main question which has been raised in the lastyears is: given our available data, does our classification ofasteroid into families provide a reliable history of the collisionalevolution of our solar system?We have done huge steps forward, but the real...

Convex shape models and spin vectors of asteroids are now routinely derived from their disk-integrated lightcurves by the lightcurve inversion method of Kaasalainen et al. (2001, Icarus 153, 37). These shape models can be then used in combination with thermal infrared data and a thermophysical model to derive other physical parameters - size,...

The vast majority of the geological constraints (i.e., internal structure via the density, cratering history) for main belt asteroids have so far been obtained via dedicated interplanetary missions (e.g., Rosetta, DAWN). The high angular resolution of SPHERE/ZIMPOL (one pixel represents 3.6 x 3.6 mas on sky), the new-generation visible...

We describe here a methodology to identify asteroids serendipitously observed in large-area astronomical surveys using Virtual Observatory tools such as SkyBoT, TOPCAT, and STILTS. The application of this method on the WFCAM Transit Survey is demonstrated. We provide almost 15,000 accurate positions (mean RMS 0.15 arcsec) and J-band magnitudes...

The article presents the concept of a new spectrograph designed to observe asteroids. The main objective of this instrument is the coverage in one shot of the wavelengths interval of the visible and near-infrared, between 0.5 and 1.6 μm. The spectrograph is designed to observe in low resolution and to characterize the minerals at the surface of...

As part of our ESO large program (ID 199.C-0074), we observed asteroid (7) Iris with the VLT/SPHERE/ZIMPOL instrument throughout its rotation during two consecutive nights in October 2017 (five different epochs). Iris, which is one of the four D>200 km S-type main belt asteroids along with (3) Juno, (15) Eunomia and (29) Amphitrite, is an...

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Since October 2016, the short term (ST) processing of Solar System Objects (SSOs) by Gaia is up and running, and it has produced almost 600 alerts. A crucial point in the chain is the possibility of performing a short arc orbit determination as soon as the object has been detected, which allows the follow up of the object from the ground.The...

Differentiated asteroids are rare in the main asteroid belt despite evidence for ˜100 distinct differentiated bodies in the meteorite record. We have sought to understand why so few main belt asteroids differentiated and where those differentiated bodies or fragments reside. Using the Sloan Digital Sky Survey (SDSS) to search for a needle in a...

Near-Earth asteroid (NEA) 162173 (1999 JU3) (hereafter 1999 JU3) is the primary target of JAXA's Hayabusa 2 mission and also a backup target of NASA's OSIRIS-REx mission, not only because of its accessibility but also because it would be the first C-type asteroid for exploration missions. Knowing the information about spin status, such as...

Large (D>100km) asteroids are the most direct remnants of the building blocks of planets. (2) Pallas is the third largest asteroid and the parent body of a small collisional family. Its spectral properties indicate a B-type surface, meaning Pallas is most likely linked to carbonaceous chondrite meteorites. Disc-resolved images have revealed a...

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