exoALMA. XVII. 表征尘埃不对称性周围气体动力学
地球与行星天体物理
2025-04-29 v1 太阳与恒星天体物理
摘要
原球体盘中的关键行星形成过程仍是活跃的研究课题。一个有前景的机制可径向和方位上捕获亚毫米发射尘埃颗粒，使其浓度增强并成长为行星状体，就是反气旋涡 vortices。虽然尘埃观测已在多个盘中揭示半圆结构，但其动力学特征的观测仍缺乏。研究气体动力学不仅是确认涡旋存在、理解其尘埃捕获特性的关键。本文利用exoALMA大型计划的高分辨率和高灵敏度观测，搜索四个具有方位尘埃不对称性的盘（HD 135344B、HD 143006、HD 34282和MWC 758）中此类特征。为评估涡旋特征，我们构建了解析涡旋模型并进行了流体动力学模拟。后者假设两种情景：一种是涡旋在死区边缘触发，另一种是由大质量嵌入行星创建的凹陷。这些模型揭示了涡旋的复杂动力学形貌。与数据比较后，我们发现None of the sources show a distinctive vortex signature around the dust crescents in the kinematics.（数据中没有任何来源在尘埃半圆附近显示明显的涡旋特征。）
引用
@article{arxiv.2504.20023,
title = {exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries},
author = {Lisa Wölfer and Marcelo Barraza-Alfaro and Richard Teague and Pietro Curone and Myriam Benisty and Misato Fukagawa and Jaehan Bae and Gianni Cataldi and Ian Czekala and Stefano Facchini and Daniele Fasano and Mario Flock and Maria Galloway-Sprietsma and Himanshi Garg and Cassandra Hall and Jane Huang and John D. Ilee and Andrés F. Izquierdo and Kazuhiro Kanagawa and Geoffroy Lesur and Cristiano Longarini and Ryan A. Loomis and Francois Menard and Anika Nath and Ryuta Orihara and Christophe Pinte and Daniel J. Price and Giovanni Rosotti and Jochen Stadler and Gaylor Wafflard-Fernandez and Andrew J. Winter and Hsi-Wei Yen and Tomohiro C. Yoshida and Brianna Zawadzki},
journal= {arXiv preprint arXiv:2504.20023},
year = {2025}
}
备注
19 pages, 8 figures, 1 table, This paper is part of the exoALMA Focus Issue of The Astrophysical Journal Letters