DELVE四星星系搜索I. 一颗透镜低亮度AGN
宇宙学与河外天体物理
2025-09-22 v2
摘要
使用DELVE调查和WISE W1-W2颜色发现了一颗四星透镜源J125856.3-031944。随后进行的Magellan Baade 6.5米望远镜直接成像和2.5米北欧光学望远镜的光谱分析均被分析。该透镜图像配置呈飞机形，其中透镜星系的主轴沿飞机形的对称轴，最淡的图像位于其尾部。6000Å以上的尾部图像与透镜星系强烈混合。使用Magellan的Sloan g波段直接成像可实现去混合。由于透镜图像配置近乎圆形，简单模型给出所有四个图像的高预测放大系数。该源在红移z=2.225处的窄发射线和低本征亮度使其符合类型2 AGN。Magellan图像显示显著的残差，暗示第二个透镜星系的存在。
引用
@article{arxiv.2404.14256,
title = {The DELVE Quadruple Quasar Search I. A Lensed Low Luminosity AGN},
author = {Paul L. Schechter and Dominique Sluse and Erik A. Zaborowski and Alex Drlica-Wagner and Cameron Lemon and Frederic Dux and Frederic Courbin and Angela Hempel and Martin Millon and Tommaso Treu and Raul Teixeira and Monika Adamów and Clecio R. Bom and Julio A. Carballo-Bello and Peter S. Ferguson and Robert A. Gruendl and David J. James and Clara E. Martínez-Vásquez and Pol Massana and Sidney Mau and Burçin Mutlu-Pakdil and Noëlia E. D. Noël and Andrew B. Pace and Joanna D. Sakowska and Guy S. Stringfellow and Erik J. Tollerud and A. Katherina Vivas and Alfredo Zenteno},
journal= {arXiv preprint arXiv:2404.14256},
year = {2025}
}
备注
Accepted for publication in AJ. New data, better model. See Fig. 3