Near-infrared spectroscopic characterization of the Pallas family
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511105" target="_blank" >RIV/00216208:11320/25:10511105 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=hMrxjbDT8V" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=hMrxjbDT8V</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202453489" target="_blank" >10.1051/0004-6361/202453489</a>
Alternative languages
Result language
angličtina
Original language name
Near-infrared spectroscopic characterization of the Pallas family
Original language description
Context. Asteroid families hold clues to the collisional processes that shaped the Solar System over billions of years. The Pallas collisional family, named after (2) Pallas, is notable for its high orbital inclination and the distinct blue color of Pallas and a few larger B-type family members. While Pallas itself, as one of the largest asteroids, has been studied in detail, most of its smaller family members still remain unexplored. Aims. This study aims to characterize the physical properties of medium- to small-sized Pallas family asteroids to investigate the origin of their unusual blueness. We seek to establish connections between asteroid spectra and meteorite analogs. Additionally, we explore the relationship between the Pallas family and the near-Earth object (NEO) (3200) Phaethon. Methods. We conducted near-infrared (NIR) spectroscopy with the NASA Infrared Telescope Facility (IRTF) to collect reflectance spectra for 22 asteroids, including one from the IRTF Legacy Archive. Spectroscopic and dynamical analyses were carried out to identify outliers, while additional data from NEOWISE and Gaia were incorporated to examine potential correlations among their physical properties. Meteorite analogs were identified through chi(2) matching using samples from the RELAB database. Results. The observed Pallas family asteroids exhibit nearly identical spectral profiles, suggesting a homogeneous composition of ejected material. Small variations in spectral slopes are observed, which may result from different levels of alteration experienced by individual asteroids, with some influence from variations in grain size. Most of the observed spectra of the Pallas asteroids, from 0.8 to 2.2 mu m, closely resemble those of the CY and CI meteorites. The blueness of asteroid surfaces is likely due to the presence of magnetite, troilite, or phyllosilicates, which are products of aqueous alteration. The striking spectral similarity between (3200) Phaethon and Pallas family members of comparable sizes suggests a potential common origin.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA25-16507S" target="_blank" >GA25-16507S: Early dynamics of planets and analysis of asteroid populations</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
1432-0746
Volume of the periodical
695
Issue of the periodical within the volume
brezen
Country of publishing house
FR - FRANCE
Number of pages
10
Pages from-to
A254
UT code for WoS article
001452581300001
EID of the result in the Scopus database
2-s2.0-105001368477