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Heliocentric distribution of asteroid taxonomic classes
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Astronomy and Space Physics.
2006 (English)In: Astronomy and AstrophysicsArticle in journal (Other (popular scientific, debate etc.)) Published
Abstract [en]

A rigorous study of the heliocentric distribution of asteroid taxonomic classes for main belt objects larger than 25 km is performed, based on SMASSII spectra classified in the Gaia C1M system.

We estimate the number of classified main belt asteroids by correcting for observational bias effects and derive the estimated true distribution of fractional populations of asteroid classes.

C complex asteroids likely have a maximal fractional abundance in the middle part of the main belt at 2.8 AU, at the same location where B class objects are minimally abundant. The fractional distributions of S and L complexes are generally decreasing and the X complex generally increasing with heliocentric distance. Previously described small-scale variations in the distribution curves are sensitive on the taxonomic classification and cannot be considered statistically significant. The main belt on average is populated by 35% C, 32% X and 17% S class objects.

Place, publisher, year, edition, pages
2006.
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URN: urn:nbn:se:uu:diva-76524OAI: oai:DiVA.org:uu-76524DiVA: diva2:104436
Note
Part of ESA Gaia mission studyAvailable from: 2006-03-03 Created: 2006-03-03 Last updated: 2011-01-11

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Warell, JohanLagerkvist, Claes-Ingvar

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