Observations of "fresh" and weathered surfaces on asteroid pairs and their implications on the rotational-fission mechanism

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10286611" target="_blank" >RIV/00216208:11320/14:10286611 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.icarus.2014.01.014" target="_blank" >http://dx.doi.org/10.1016/j.icarus.2014.01.014</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2014.01.014" target="_blank" >10.1016/j.icarus.2014.01.014</a>

Result language

angličtina

Original language name

Observations of "fresh" and weathered surfaces on asteroid pairs and their implications on the rotational-fission mechanism

Original language description

The rotational-fission of a "rubble-pile" structured asteroid can result in an "asteroid pair" - two unbound asteroids sharing nearly identical heliocentric orbits. Models suggest that this mechanism exposes material from below the progenitor surface that previously had never have been exposed to the weathering conditions of space. Therefore, the surfaces of asteroid pairs offer the opportunity to observe non-weathered "fresh" spectra. Here we report near-infrared spectroscopic observations of 31 asteroids in pairs. In order to search for spectral indications of fresh surfaces we analyze their spectral slopes, parameters of their 1 ?m absorption band and taxonomic classification. Additionally, through backward dynamical integration we estimate the timeelapsed since the disintegration of the pairs' progenitors. Analyzing the 19 ordinary chondrite-like (S-complex) objects in our sample, we find two Q-type Asteroids (19289 and 54827) that are the first of their kind to be observed in the

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GAP209%2F12%2F0229" target="_blank" >GAP209/12/0229: Study of non-gravitational asteroid evolution processes via photometric observations</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Icarus

ISSN

0019-1035

e-ISSN

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Volume of the periodical

233

Issue of the periodical within the volume

květen

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

9-26

UT code for WoS article

000333729300002

EID of the result in the Scopus database

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