Detectability of Strongly Gravitationally Lensed Tidal Disruption Events

被引：3

作者：

Chen, Zhiwei ^{[1
,2
]}

Lu, Youjun ^{[1
,2
]}

Chen, Yunfeng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China

[2] Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2024年 / 962卷 / 01期

基金：

中国国家自然科学基金;

关键词：

VELOCITY DISPERSION FUNCTION; MASSIVE BLACK-HOLES; DIGITAL SKY SURVEY; LUMINOSITY FUNCTION; STELLAR; STARS; EVOLUTION; GALAXIES; RATES; PERFORMANCE;

D O I：

10.3847/1538-4357/ad19d3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

More than 100 tidal disruption events (TDEs) have been detected at multiple bands, which can be viewed as extreme laboratories to investigate the accretion physics and gravity in the immediate vicinity of massive black holes. Future transient surveys are expected to detect several tens of thousands of TDEs, among which a small fraction may be strongly gravitationally lensed by intervening galaxies. In this paper, we statistically estimate the detection rate of lensed TDEs, with dependence on the limiting magnitude of the transient all-sky surveys searching for them. We find that the requisite limiting magnitude for an all-sky transient survey to observe at least 1 yr-1 is greater than or similar to 21.3, 21.2, and 21.5 mag in the u, g, and z bands, respectively. If the limiting magnitude of the all-sky survey can reach similar to 25-26 mag in the u, g, and z bands, the detection rate can be up to about several tens to hundreds per year. The discovery and identification of the first image of the lensed TDE can be taken as an early warning of the second and other subsequent images, which may enable detailed monitoring of the pre-peak photometry and spectroscopy evolution of the TDE. The additional early-stage information may help to constrain the dynamical and radiation processes involved in the TDEs.

引用

页数：8

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