论文标题
来自Movis目录的14个V型候选小行星的光谱表征
Spectral characterisation of 14 V-type candidate asteroids from the MOVIS catalogue
论文作者
论文摘要
据信目前大多数已知的玄武岩（V型）小行星被认为是维斯塔动态家庭的过去或现在成员。与Vesta家族无动态相关的V型小行星的不断增加的发现表明，在太阳系的早期阶段可能存在许多主要的玄武岩。在这项工作中，我们旨在对从Vista调查（MOVIS）目录中的移动对象中选择的各种动力学类型的14个V型候选物进行光谱分析。计算出的可见和近红外（NIR）光谱参数用于研究与预期的玄武岩组成的空间渗透或矿物学差异的证据。基于对它们可见光谱的分析，我们确认11种新的V型小行星：6个低I小行星 - （3188）Jekabsons，（3331）Kvistaberg，（4693）Drummond，Drummond，（7223），（7223）Dolgorukij，Dolgorukij，（9007）James Bond，（9007）James Bond，以及（29733）199999999999 BA4;以及四个内部的小行星 - （5524）Lecacheux，（19983）1990 DW，（51742）2001 ke $ _ {55} $，和（90023）2003 2003 bd $ _ {13} $;以及一个逃亡者 - （2275）Cuitlahuac。此外，我们根据其可见 + NIR光谱分析了三个特殊的外部主带候选者。我们确认了（2452）lyot的二源性类成分。小行星（7302）的光谱与玄武岩组成不一致，并且可能反映了S型体。 （14390）1990 QP $ _ {10} $的光谱显示出独特的功能，这些功能暗示了一个特殊的，未分类的构图。总体而言，我们的结果证明了Movis目录在识别V型物体中的效率，成功率超过85％。由于Vesta家族和附近的其他小行星的存在，在内部主带中的V型鉴定更有可能。在中部和外部主带，数据量更加有限的情况下，假阳性的比例增加。
Most of the currently known basaltic (V-type) asteroids are believed to be past or present members of the Vesta dynamical family. The rising discoveries of V-type asteroids that are not dynamically linked to the Vesta family suggest that a number of major basaltic bodies may have been present during the early stages of the solar system. In this work, we aim to provide a spectral analysis of 14 V-type candidates of various dynamical types, selected from the Moving Objects from VISTA Survey (MOVIS) catalogue. The computed visible and near-infrared (NIR) spectral parameters are used to investigate evidence of space-weathering or mineralogical differences from the expected basaltic composition. Based on the analysis of their visible spectra, we confirm 11 new V-type asteroids: six low-i asteroids - (3188) Jekabsons, (3331) Kvistaberg, (4693) Drummond, (7223) Dolgorukij, (9007) James Bond, and (29733) 1999 BA4; along with four inner-other asteroids - (5524) Lecacheux, (19983) 1990 DW, (51742) 2001 KE$_{55}$, and (90023) 2003 BD$_{13}$; as well as one fugitive - (2275) Cuitlahuac. Additionally, we analysed three peculiar outer main belt candidates based on their visible + NIR spectra. We confirm the diogenite-like composition of (2452) Lyot. The spectrum of asteroid (7302) is inconsistent with a basaltic composition and likely reflects an S-type body. The spectrum of (14390) 1990 QP$_{10}$ shows unique features that suggest a peculiar, unclassified composition. Overall, our results demonstrate the efficiency of the MOVIS catalogue in identifying V-type objects, with a success rate of over 85\%. The identification of V-types in the inner main-belt is more likely due to the presence of the Vesta family and other nearby asteroids that had escaped from the family. In the middle and outer main belt, where the amount of data is more limited, the proportion of false positives increases.
