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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP209%2F12%2F0229" target="_blank" >GAP209/12/0229: Studium negravitačních mechanismů vývoje asteroidů pomocí fotometrických pozorování</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Icarus

ISSN

0019-1035

e-ISSN

—

Svazek periodika

233

Číslo periodika v rámci svazku

květen

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

9-26

Kód UT WoS článku

000333729300002

EID výsledku v databázi Scopus

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