Spectroscopic characterization of the Gefion Asteroid Family: implications for L-chondrite Link

Allison M. Mcgraw, Vishnu Reddy, Juan A. Sanchez

Research output: Contribution to journalArticlepeer-review

Abstract

Asteroid families are cosmic puzzles that help us understand the true nature of their original parent body. Ordinary chondrites are the most common types of meteorites that arrive to Earth and are composed of three subtypes: H, L, and LL chondrites. The Gefion Asteroid Family (GAF) has been proposed to be the source asteroids for the L chondrites. In this work, we present the results of a spectroscopic campaign of six dynamically defined members of the GAF to test the hypothesis if L chondrites come from this family. Our compositional analysis of these six asteroids shows a range of meteorite analogues from L- to LL chondrites. Combining these results with our previous work, we note that GAF asteroids span the entire ordinary chondrite range of H-, L-, and LL. The observed compositional heterogeneity in the GAF is likely due to largest members of the GAF consisting of interlopers. A more detailed spectroscopic survey of a large subset of asteroids in the GAF region is needed to further isolate true family members.

Original languageEnglish (US)
Pages (from-to)5211-5218
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume515
Issue number4
DOIs
StatePublished - Oct 1 2022

Keywords

  • meteorites, meteors, meteoroids
  • minor planets, asteroids: general
  • techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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