双透镜事件微透镜像的首次分辨
太阳与恒星天体物理
2024-12-25 v3 星系天体物理
天体物理仪器与方法
摘要
我们使用甚大望远镜干涉仪（VLTI）的GRAVITY仪器分辨了双透镜微透镜事件ASASSN-22av的多个像。光变曲线显示出微弱的双透镜扰动，使分析变得复杂，但与VLTI数据的联合建模打破了几个简并，得到了一个强烈偏好的解。得益于对角爱因斯坦半径 mas 和微透镜视差的精确测量，我们确定该透镜系统由两颗M矮星组成，质量分别为 和 ，投影间距为 au，距离为 kpc。对ASASSN-22av的成功VLTI观测为研究中等间距（即几个天文单位）的恒星质量双星开辟了新途径，包括那些包含中子星和恒星质量黑洞等暗致密天体的双星。
关键词
引用
@article{arxiv.2409.13015,
title = {First Resolution of Microlensed Images of a Binary-Lens Event},
author = {Zexuan Wu and Subo Dong and A. Mérand and Christopher S. Kochanek and Przemek Mróz and Jinyi Shangguan and Grant Christie and Thiam-Guan Tan and Thomas Bensby and Joss Bland-Hawthorn and Sven Buder and Frank Eisenhauer and Andrew P. Gould and Janez Kos and Tim Natusch and Sanjib Sharma and Andrzej Udalski and J. Woillez and David A. H. Buckley and I. B. Thompson and Karim Abd El Dayem and Anthony Berdeu and Jean-Philippe Berger and Guillaume Bourdarot and Wolfgang Brandner and Richard I. Davies and Denis Defrère and Catherine Dougados and Antonia Drescher and Andreas Eckart and Maximilian Fabricius and Helmut Feuchtgruber and Natascha M. Förster Schreiber and Paulo Garcia and Reinhard Genzel and Stefan Gillessen and Gernot Heißel and Sebastian Hönig and Mathis Houlle and Pierre Kervella and Laura Kreidberg and Sylvestre Lacour and Olivier Lai and Romain Laugier and Jean-Baptiste Le Bouquin and James Leftley and Bruno Lopez and Dieter Lutz and Felix Mang and Florentin Millour and Miguel Montargès and Hugo Nowacki and Mathias Nowak and Thomas Ott and Thibaut Paumard and Karine Perraut and Guy Perrin and Romain Petrov and Pierre-Olivier Petrucci and Nicolas Pourre and Sebastian Rabien and Diogo C. Ribeiro and Sylvie Robbe-Dubois and Matteo Sadun Bordoni and Daryl Santos and Jonas Sauter and Jules Scigliuto and Taro T. Shimizu and Christian Straubmeier and Eckhard Sturm and Matthias Subroweit and Calvin Sykes and Linda Tacconi and Frédéric Vincent and Felix Widmann},
journal= {arXiv preprint arXiv:2409.13015},
year = {2024}
}
备注
Published in ApJ. See the ancillary file for animation associated with Fig. 8