000005544 001__ 5544
000005544 005__ 20220105120125.0
000005544 037__ $$aCTALK-2022-0001
000005544 100__ $$aDelbo, Marco
000005544 245__ $$aGaia spectroscopic view of the asteroid main belt and beyond 
000005544 260__ $$c2021
000005544 269__ $$c2021-09-21
000005544 520__ $$aAsteroids reflectance spectra in the visible light will be one of the novel products of the Gaia Data Release 3 (DR3). These spectra are produced from Gaia observations obtained by means of the blue and red photometers — the so-called BP and RP, respectively. We will review the strategy adopted to produce asteroid reflectance spectra from BP-RP data, focusing on the choice of spectro-photometric calibrations computed taking into account solar system object astrometry and suitable lists of solar-analog stars. Our preliminary investigation shows that we will be able to obtain reflectance spectra for asteroids as small as some km in the main belt, by exploiting the fact that each object has been observed multiple times by Gaia. We will show the capability of Gaia to probe the detailed compositional gradient of the main belt down to small sizes and to study correlations between spectral classes and other asteroid physical parameters, such as albedo and size. Concerning the brightest asteroids, we expect to have substantial signal at wavelengths shorter than 450 nm, allowing Gaia to examine this region of the spectrum that has been poorly investigated by ground-based asteroid spectroscopic surveys. This region is characterised by the presence of a reflectance downturn that is diagnostic for the composition of classes of primitive asteroids, for instance those including the parent bodies of carbonaceous chondrites. These asteroids may have played an important role for the delivery of prebiotic compounds to Earth during the early phases of solar system' s history and, as such, are at the center of attention of the planetary science community. 
000005544 536__ $$aGaia PRODEX/$$cGaia PRODEX/$$fGaia PRODEX
000005544 594__ $$aNO
000005544 6531_ $$aAsteroids
000005544 6531_ $$aSpectrophotometry
000005544 6531_ $$aGaia
000005544 700__ $$aGalluccio, Laurent
000005544 700__ $$aDe Angeli, Francesca
000005544 700__ $$aTanga, Paolo
000005544 700__ $$aCellino, Alberto 
000005544 700__ $$aPauwels, Thierry
000005544 700__ $$aMignard, Francois
000005544 773__ $$t15th Europlanet Science Congress 2021, held virtually, 13-24 September 2021
000005544 8560_ $$fthierry.pauwels@observatoire.be
000005544 85642 $$ahttps://meetingorganizer.copernicus.org/EPSC2021/session/41655#Oral_and_Poster_presentations_and_abstracts
000005544 906__ $$aContributed
000005544 980__ $$aCTALKCONT