ZTF中的首个潮汐撕裂耀发：从测光遴选到多波段表征
高能天体物理现象
2019-03-06 v2 星系天体物理
摘要
我们呈现Zwicky Transient Facility (ZTF)对Holoien等人报道并在ZTF调试期间探测到的潮汐撕裂耀发AT2018zr/PS18kh的观测。该潮汐撕裂事件(TDE)的ZTF光变曲线极好地采样了从上升到峰值的过程，在最大光度时刻前有50天的g波段与r波段探测。我们还呈现了我们的多波段后续观测，包括探测到一个热(kT~100 eV)X射线源，其比同时期的光学/UV黑体光度暗两个数量级，以及对射电辐射的严格上限。我们利用对128个已知活动星系核(AGN)的观测来评估ZTF天体测量的质量，发现真实核耀发的宿主-耀发距离中位数为0.2"。利用对已知AGN与超新星变化的ZTF观测，我们展示如何将这些源与TDE分离。光变曲线形状、颜色以及在宿主星系中的位置的组合可用于从ZTF或LSST等多波段光学巡天中遴选出干净的TDE样本。
引用
@article{arxiv.1809.02608,
title = {The first tidal disruption flare in ZTF: from photometric selection to multi-wavelength characterization},
author = {Sjoert van Velzen and Suvi Gezari and S. Bradley Cenko and Erin Kara and James C. Miller-Jones and Tiara Hung and Joe Bright and Nathaniel Roth and Nadejda Blagorodnova and Daniela Huppenkothen and Lin Yan and Eran Ofek and Jesper Sollerman and Sara Frederick and Charlotte Ward and Matthew J. Graham and Rob Fender and Mansi M. Kasliwal and Chris Canella and Robert Stein and Matteo Giomi and Valery Brinnel and Jakob Santen and Jakob Nordin and Eric C. Bellm and Richard Dekany and Christoffer Fremling and V. Zach Golkhou and Thomas Kupfer and Shrinivas R. Kulkarni and Russ R. Laher and Ashish Mahabal and Frank J. Masci and Adam A. Miller and James D. Neill and Reed Riddle and Mickael Rigault and Ben Rusholme and Maayane T. Soumagnac and Yutaro Tachibana},
journal= {arXiv preprint arXiv:1809.02608},
year = {2019}
}
备注
accepted to ApJ, updated with recent Swift data