Discovery of a compact hierarchical triple main-sequence star system while searching for binary stars with compact objects

该研究通过结合 Gaia 数据、多轮光谱观测及 TESS 光变曲线分析,发现并确认了一个名为 G1010 的紧凑层级三合星系统,纠正了此前关于其伴星为致密天体的推测,揭示了其真实结构为一个主星加内层食双星。

Ataru Tanikawa, Akito Tajitsu, Satoshi Honda, Hiroyuki Maehara, Bun'ei Sato, Kento Masuda, Masashi Omiya, Hideyuki IzumiuraWed, 11 Ma🔭 astro-ph

Worlds Next Door. IV. Mapping the Late Stages of Giant Planet Evolution with a Precise Dynamical Mass and Luminosity for ϵ\epsilon Ind Ab

该研究利用詹姆斯·韦伯太空望远镜(JWST)的 NIRCam 和 MIRI 仪器对邻近冷气体巨行星 ϵ\epsilon Ind Ab 进行了 4-25 μ\mum 波段成像与测光,结合长期径向速度及天体测量数据精确测定了其动力学质量(约 6.5 倍木星质量)和光度,构建了首份系外冷巨行星的完整光谱能量分布,并验证了其在低质量、低光度及高龄阶段的演化模型预测。

Aniket Sanghi, William Thompson, James Mang, Jerry Xuan, Dimitri Mawet, Jean-Baptiste Ruffio, Yapeng Zhang, Jason Wang, Caroline Morley, Eric Nielsen, William Roberson, Elisabeth Matthews, Aarynn Carter, Ian Crossfield, Mathilde Mâlin, Björn Benneke, Alexis Bidot, András Gáspár, Carrie He, Katelyn Horstman, Alexander Madurowicz, Christian Marois, Rebecca Oppenheimer, Marshall PerrinWed, 11 Ma🔭 astro-ph

Spitzer + HST parallaxes of 13 late T and Y dwarfs

该研究结合斯皮策望远镜存档数据与哈勃空间望远镜新观测,对 13 个邻近冷褐矮星进行了视差测量,证实了此类天体在近红外和中红外波段存在巨大的内禀弥散,表明仅靠测光估算距离并不可靠,必须依赖视差测量才能对其进行有效表征。

Federico Marocco (NOIRLab, US), J. Davy Kirkpatrick (NOIRLab, US), Richard L. Smart (INAF/OATo, IT), Adam C. Schneider (USNO, US), Dan Caselden (AMNH, US), Edgardo Costa (U. de Chile, CL), Michael C. Cushing (U. of Toledo, US), Maximiliano Dirk (U. of Hertfordshire, UK, INAF/OATo, IT), Peter R. M . Eisenhardt (NASA JPL, US), Jacqueline K. Faherty (AMNH, US), Christopher R. Gelino (NOIRLab, US), Marc J. Kuchner (NASA GSFC, US), Aaron M. Meisner (U. de Chile, CL), Rene A. Mendez (U. de Chile, CL), Robert A. Stiller (U. of Toledo, US), Edward L. Wright (UCLA, US)Wed, 11 Ma🔭 astro-ph

Variable magnetic field and adaptive mixing-length: reproducing Li abundances and constraining rotational evolution of solar-type stars in clusters

该研究通过引入随恒星参数动态变化的磁场强度和混合长参数,构建了旋转恒星模型,成功复现了类太阳恒星的锂丰度及旋转演化趋势,但指出当前模型在预测太阳当前自转速率和表面磁场强度时仍存在偏差,表明需要引入额外的角动量损失机制或改进磁饱和物理。

R. Caballero Navarro, A. García Hernández, J. C. SuárezWed, 11 Ma🔭 astro-ph

Joint Diagnostics of Circumsolar Sky Brightness Using Coronagraphic Measurements and Aerosol Optical Inversions at Mauna Loa

该研究利用莫纳克亚山观测站的日冕仪测量与气溶胶光学反演数据,验证了两者在太阳周围 1.54 度范围内天空亮度的定量一致性,从而建立了基于 AERONET 数据的长期日冕观测质量评估框架,并阐明了可见光日晕增强并不必然意味着红外日冕观测条件恶劣。

Thomas A. Schad, Paul Bryans, Andre Fehlmann, Sarah Gibson, David M. Harrington, Lucas A. Tarr, Steven Tomczyk, Jeffrey G. YepezWed, 11 Ma🔭 astro-ph

Detection and Astrometry of the Ba-Bb Subsystem in α\alpha Piscium: First Dual-Field Interferometry at the CHARA Array

该论文报告了 CHARA 阵列首次成功实施双场干涉观测,直接解析并确认了亮星α\alpha Piscium 中 B 分量内存在一个由两颗近等质量 F 型恒星组成的短周期(25 天)双星子系统(Ba-Bb),并通过结合干涉测量、VLTI 天体测量及光谱数据精确测定了其动力学质量,同时验证了该阵列在角秒级双星亚毫角秒级天体测量方面的新能力。

Narsireddy Anugu (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Robert Klement (European Organisation for Astronomical Research in the Southern Hemisphere, Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France, The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), John D. Monnier (Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA), Douglas R. Gies (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Gail H. Schaefer (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Stefan Kraus (Astrophysics Group, Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK), Sebastián Carrazco-Gaxiola (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Akshat S. Chaturvedi (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Mayra Gutierrez (Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA), Becky Flores (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Jeremy Jones (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Colin Kane (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Rainer Köhler (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Karolina Kubiak (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Olli W. Majoinen (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Nicholas J. Scott (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Kayvon Sharifi (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA)Wed, 11 Ma🔭 astro-ph

Multi-spacecraft constraints on relativistic solar energetic particle transport in the widespread 28 October 2021 event

该研究利用多航天器观测数据,通过反演建模和数值模拟揭示了 2021 年 10 月 28 日相对论性太阳高能粒子事件中,狭窄的注入区(20\leq 20^\circ)与显著的横向扩散共同作用导致了粒子在广阔空间范围内的广泛传播。

E. Lavasa, J. T. Lang, A. Papaioannou, R. D. Strauss, S. A. Mallios, A. Hillaris, A. Kouloumvakos, A. Anastasiadis, I. A. DaglisWed, 11 Ma🔭 astro-ph