Search for Signs of Sublimation-Driven Dust Activity of Primitive-Type Asteroids Near Perihelion

IF 0.8 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS Solar System Research Pub Date : 2023-10-02 DOI:10.1134/S0038094623050015

V. V. Busarev, E. V. Petrova, M. P. Shcherbina, S. Yu. Kuznetsov, M. A. Burlak, N. P. Ikonnikova, A. A. Savelova, A. A. Belinskii

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Abstract—

In December 2021 to February 2022, the UBVRI photometry of 29 primitive-type asteroids of the Main Belt, being near the perihelion distances, was carried out at the 0.6-meter RC600 semiautomatic telescope of the Caucasus Mountain Observatory (CMO) of the Sternberg Astronomical Institute, Moscow State University. These observations, as well as the data processing and analysis, were aimed at searching for supposed sublimation-driven dust activity on asteroids under maximal subsolar temperatures. Among the tasks to be accomplished was the comparison of the physical and dynamic parameters of active and inactive asteroids. The main result is that substantial spectral signs of quasi-simultaneous sublimation-driven dust activity were detected on six primitive-type asteroids of the Main Belt—145 Adeona, 302 Clarissa, 322 Phaeo, 435 Ella, 690 Wratislavia, and 779 Nina (on 302 Clarissa, 322 Phaeo, 435 Ella, and 690 Wratislavia—for the first time). These six asteroids represent ~21% of all bodies included in the observation program. Probable spectral manifestations of activity at a lower intensity level were detected for the first time on five more asteroids—424 Gratia, 751 Faina, 762 Pulcova, 778 Theobalda, and 859 Bouzaréah. On 145 Adeona and 779 Nina, sublimation-driven dust activity near perihelion was registered for the third time for the last ten years; this time interval corresponds to about three orbital periods of these asteroids around the Sun. We consider the circumstances due to which five of the listed asteroids possess families. General processes and conditions that could and/or can influence the portion of primitive-type asteroids that quasi-simultaneously show signs of sublimation-driven dust activity are discussed.

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在近日点附近寻找原始型小行星升华驱动尘埃活动的迹象

摘要——2021年12月至2022年2月，在莫斯科国立大学斯滕贝格天文研究所高加索山天文台（CMO）0.6米的RC600半自动望远镜上，对主带29颗接近近日点距离的原始型小行星进行了UBVRI测光。这些观测以及数据处理和分析的目的是寻找在最高亚极地温度下小行星上由升华驱动的尘埃活动。要完成的任务之一是比较活动小行星和非活动小行星的物理和动力学参数。主要结果是，在主带的六颗原始型小行星上——145颗阿代纳小行星、302颗克拉利萨小行星、322颗法欧小行星、435颗埃拉小行星、690颗雷蒂斯拉维亚小行星和779颗尼娜小行星上——首次探测到准同时升华驱动的尘埃活动的大量光谱迹象。这六颗小行星约占观测计划中所有天体的21%。在另外五颗小行星上，即424颗Gratia、751颗Faina、762颗Pulcova、778颗Theobalda和859颗Bouzaréah，首次检测到了可能的低强度活动光谱表现。在145 Adeona和779 Nina，近日点附近升华驱动的尘埃活动在过去十年中第三次被记录；这个时间间隔对应于这些小行星围绕太阳的大约三个轨道周期。我们考虑了所列小行星中有五颗拥有家族的情况。讨论了可能和/或可能影响原始型小行星部分的一般过程和条件，这些小行星几乎同时显示出升华驱动的尘埃活动的迹象。

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来源期刊

Solar System Research 地学天文-天文与天体物理

CiteScore

1.60

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Solar System Research publishes articles concerning the bodies of the Solar System, i.e., planets and their satellites, asteroids, comets, meteoric substances, and cosmic dust. The articles consider physics, dynamics and composition of these bodies, and techniques of their exploration. The journal addresses the problems of comparative planetology, physics of the planetary atmospheres and interiors, cosmochemistry, as well as planetary plasma environment and heliosphere, specifically those related to solar-planetary interactions. Attention is paid to studies of exoplanets and complex problems of the origin and evolution of planetary systems including the solar system, based on the results of astronomical observations, laboratory studies of meteorites, relevant theoretical approaches and mathematical modeling. Alongside with the original results of experimental and theoretical studies, the journal publishes scientific reviews in the field of planetary exploration, and notes on observational results.