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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

THE EUPHROSYNE FAMILY'S CONTRIBUTION TO THE LOW ALBEDO NEAR-EARTH ASTEROIDS

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Author(s):
Masiero, Joseph R. [1] ; Carruba, V. [2] ; Mainzer, A. [1] ; Bauer, J. M. [1] ; Nugent, C. [3]
Total Authors: 5
Affiliation:
[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 - USA
[2] Univ Estadual Paulista, Dept Matemat, BR-12516410 Guaratingueta, SP - Brazil
[3] CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 - USA
Total Affiliations: 3
Document type: Journal article
Source: ASTROPHYSICAL JOURNAL; v. 809, n. 2 AUG 20 2015.
Web of Science Citations: 8
Abstract

The Euphrosyne asteroid family is uniquely situated at high inclination in the outer Main Belt, bisected by the n6 secular resonance. This large, low albedo family may thus be an important contributor to specific subpopulations of the near-Earth objects. We present simulations of the orbital evolution of Euphrosyne family members from the time of breakup to the present day, focusing on those members that move into near-Earth orbits. We find that family members typically evolve into a specific region of orbital element-space, with semimajor axes near similar to 3 AU, high inclinations, very large eccentricities, and Tisserand parameters similar to Jupiter family comets. Filtering all known Near-Earth objects (NEOs) with our derived orbital element limits, we find that the population of candidate objects is significantly lower in albedo than the overall NEO population, although many of our candidates are also darker than the Euphrosyne family, and may have properties more similar to comet nuclei. Followup characterization of these candidates will enable us to compare them to known family properties, and confirm which ones originated with the breakup of (31) Euphrosyne. (AU)

FAPESP's process: 14/06762-2 - Secular families
Grantee:Valerio Carruba
Support type: Regular Research Grants