基于光学与中红外成像巡天的遥远类星体尘埃反响映射
星系天体物理
2020-09-09 v1
摘要
活动星系核(AGN)及其高光度对应体类星体的尘埃环尺寸，可由UV/光学吸积盘连续谱变率与中红外(MIR)环发射响应之间的时间延迟推断。这种尘埃反响映射(RM)技术已成功应用于约70个红移z≲0.3的AGN和类星体。本文展示了我们针对SDSS Stripe 82区域所覆盖遥远类星体的尘埃RM项目的首批结果，结合了约20年地基光学光变曲线与来自WISE卫星的10年中红外光变曲线。我们测量了587个红移0.3≲z≲2(平均红移⟨z⟩∼0.8)、光度跨越两个数量级的类星体在W1波段(3.4 μm)与g波段之间的高保真延迟。它们紧密遵循(延迟内禀弥散∼0.17 dex)z<0.3 AGN所观测到的红外延迟-光度关系，揭示了跨越AGN光度四个数量级以上的尘埃环显著尺寸-光度关系，且对爱丁顿比和变率幅度等附加类星体性质依赖甚微。本研究推动了尘埃RM在宇宙学应用中的进一步探索，并有力支持了将10年Vera C. Rubin天文台时空遗产巡天(光学)与5年Nancy Grace Roman空间望远镜2 μm光变曲线相结合的深层巡天科学案，以对低红移、光度更低且可测更短红外延迟的AGN进行尘埃RM。我们母样本中7384个类星体的汇编光学与中红外光变曲线随本文公开。
引用
@article{arxiv.2007.02402,
title = {Dust Reverberation Mapping in Distant Quasars from Optical and Mid-Infrared Imaging Surveys},
author = {Qian Yang and Yue Shen and Xin Liu and Michel Aguena and James Annis and Santiago Avila and Manda Banerji and Emmanuel Bertin and David Brooks and David Burke and Aurelio Carnero Rosell and Matias Carrasco Kind and Luiz da Costa and Juan De Vicente and Shantanu Desai and H. Thomas Diehl and Peter Doel and Brenna Flaugher and Pablo Fosalba and Joshua Frieman and Juan Garcia-Bellido and David Gerdes and Daniel Gruen and Robert Gruendl and Julia Gschwend and Gaston Gutierrez and Samuel Hinton and Devon L. Hollowood and Klaus Honscheid and Nikolay Kuropatkin and Marcio Maia and Marisa March and Jennifer Marshall and Paul Martini and Peter Melchior and Felipe Menanteau and Ramon Miquel and Francisco Paz-Chinchon and Andres Plazas Malagón and Kathy Romer and Eusebio Sanchez and Vic Scarpine and Michael Schubnell and Santiago Serrano and Ignacio Sevilla and Mathew Smith and Eric Suchyta and Gregory Tarle and Tamas Norbert Varga and Reese Wilkinson},
journal= {arXiv preprint arXiv:2007.02402},
year = {2020}
}
备注
Accepted for publication in ApJ