2023-2050年木星、土星、天王星、海王星、土卫六和海卫一的地基恒星掩星预测
Earth-based Stellar Occultation Predictions for Jupiter, Saturn, Uranus, Neptune, Titan, and Triton: 2023-2050
AI总结：
本研究基于Gaia DR3星表与2MASS近红外K波段测光数据，给出2023-2050年六颗外太阳系天体的地基恒星掩星预测，统计了事件数量、可观测区域等信息，为外太阳系大气与环系统的十年尺度演化研究提供支撑。
摘要：
为支持外太阳系大气和环系统的十年尺度演化研究，我们基于Gaia DR3（盖亚第三批数据发布）星表以及2MASS星表的近红外K波段测光数据，给出了2023-2050年木星、土星、天王星、海王星、土卫六（Titan）和海卫一（Triton）的详细地基恒星掩星预测结果。我们按年份和星等区间统计了可观测事件的数量，反映出高信噪比（SNR）事件的发生频率差异极大，这取决于目标天体相对于银河系恒星密集区域的运行路径。我们确定了地球上每个事件具备潜在观测条件的区域，并且针对大气掩星事件，测定了掩始和掩终事件的纬度。对于土星、天王星和海王星，我们还计算了预测的环掩星事件发生时间。我们展示了预测事件的代表性子集，并重点介绍了极具观测价值的事件。K星等≤7的木星掩星发生频率约为每年一次，在2031年和2043年亮星掩星事件的发生频率更高。土星掩星则要罕见得多，在2032年和2047年仅预测到2起K星等≤5的事件。2023年至2050年期间，预测会发生10起K星等≤10的天王星环掩星事件。海王星在2068年之前都会运行在恒星稀疏的天区，这导致2023年至2050年间仅预测到13起K星等≤12的掩星事件。土卫六在2029-2031年间会发生多起高信噪比事件，而海卫一在2023年至2050年间总共仅有22起K星等≤15的掩星事件。所有预测事件的详细信息都包含在在线补充材料中。
英文摘要：
In support of studies of decadal-timescale evolution of outer solar system atmospheres and ring systems, we present detailed Earth-based stellar occultation predictions for Jupiter, Saturn, Uranus, Neptune, Titan, and Triton for 2023-2050, based on the Gaia DR3 star catalog and near-IR K-band photometry from the 2MASS catalog. We tabulate the number of observable events by year and magnitude interval, reflecting the highly variable frequency of high-SNR events depending on the target's path relative to the star-rich regions of the Milky Way. We identify regions on Earth where each event is potentially observable, and for atmospheric occultations, we determine the latitude of the ingress and egress events. For Saturn, Uranus, and Neptune, we also compute the predicted ring occultation event times. We present representative subsets of the predicted events and highlights particularly promising events. Jupiter occultations with K $\leq$7 occur at a cadence of about one per year, with bright events at higher frequency in 2031 and 2043. Saturn occultations are much rarer, with only two predicted events with K $\leq$5 in 2032 and 2047. Ten Uranus ring occultations are predicted with K$\leq$10 for the period 2023 to 2050. Neptune traverses star-poor regions of the sky until 2068, resulting in only 13 predicted occultations for K$\leq$12 between 2023 and 2050. Titan has several high-SNR events between 2029--2031, whereas Triton is limited to a total of 22 occultations with K$\leq$15 between 2023 and 2050. Details of all predicted events are included in the Supplementary Online Material.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
