Interstellar Comet 3I/ATLAS的时域光度测量与活动演化
地球与行星天体物理
2026-03-03 v1 星系天体物理
天体物理仪器与方法
摘要
时域光度监测对于表征彗星演化至关重要，尤其是对于机会有限的星际天体。我们旨在表征3I/ATLAS星际彗星在日食前的光度行为和尘埃活动，并测试Black Hole Target and Observation Manager（BHTOM）平台和望远镜网络进行协调高采样率非定向观测的能力。我们使用16台望远镜获取了2025年7月4日至9月11日的70天时间序列光度数据，共计1554幅图像。数据经BHTOM流水线处理和校准。采用高采样率、多波段成像测量旋转周期和颜色演化，同时通过Afp测量量化尘埃活动。我们呈现3I/ATLAS在日食前的光度曲线，日距（Rh）从3.18 au减至2.19 au，光度稳定增加约3个magnitude，未见异常行为。测得旋转周期为P_rot = 15.98 ± 0.08小时。相对尘埃生产从A(0)fp约600 - 1100 cm增加，尘埃质量损失率上限从≤ 217 kg/s增至≤ 328 kg/s。我们测得活动指数n = -1.24 ± 0.02，与成熟尘埃彗云相符。颜色在统计上无显著变化，仅在3.5 > Rh > 2.2 au时呈现微弱、非显著的变得更亮的趋势。
引用
@article{arxiv.2603.01383,
title = {Time-Domain Photometry and Activity Evolution of Interstellar Comet 3I/ATLAS with BHTOM},
author = {A. Fraser Gillan and Łukasz Wyrzykowski and Przemysław J. Mikołajczyk and Krzysztof Kotysz and Erica Bufanda and Colin O. Chandler and Süleyman Fişek and Henry H. Hsieh and Michael S. P. Kelley and Priscila J. Pessi and James E. Robinson and Sinan Aliş and Wieńczysław Bykowski and Richard E. Cannon and Martin Dominik and Barbara Handzlik and Mehmet İçen and Sebastian Kurowski and Ahmet Cem Kutluay and Joysankar Majumdar and Çağlayan Nehir and David O'Neill and Sibel Ötken and Kangming Pu and Özlem Şimşir and Colin Snodgrass and Cihan Tuğrul Tezcan and Fatma Tezcan and Mauritz Wicker and Fuat Korhan Yelkenci and Michał Żejmo and Kendall Ackley and M. Andersen and C. Ávalos-Vega and Sergey Belkin and V. Bozza and Rene P. Breton and M. J. Burgdorf and Jorge Casares and Vik Dhillon and A. Donaldson and Martin J. Dyer and R. Figuera Jaimes and Duncan K. Galloway and T. C. Hinse and M. Hundertmark and E. Khalouei and Thomas Killestein and Rubina Kotak and Amit Kumar and Feng-Yuan Frey Liu and P. Longa-Peña and Joe Lyman and Luigi Mancini and A. Moharana and V. Molina and Kanthanakorn Noysena and Laura Kate Nuttall and Paul O'Brien and V. Okoth and C. Opitom and Don Pollacco and M. Rabus and Gavin Ramsay and S. Sajadian and A. Salinas San Martin and J. Skottfelt and J. Southworth and Danny Steeghs and J. Tregloan-Reed and Krzysztof Ulaczyk and R. Vieliute},
journal= {arXiv preprint arXiv:2603.01383},
year = {2026}
}
备注
Comments welcome! To be submitted to Astronomy & Astrophysics