A candidate of high-z central tidal disruption event in quasar SDSS J000118.70+003314.0

被引：1

作者：

Gu, Ying ^{[1
]}

Zhang, Xue-Guang ^{[1
]}

Chen, Xing-Qian ^{[1
]}

Yang, Xing ^{[1
]}

Liang, En-Wei ^{[1
]}

机构：

[1] Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2025年 / 537卷 / 01期

基金：

中国国家自然科学基金;

关键词：

galaxies: nuclei; quasars: emission lines; quasars: individual (SDSS J0001); transients: tidal disruption events; DIGITAL SKY SURVEY; EXTREME VARIABILITY QUASARS; SUPERMASSIVE BLACK-HOLES; X-RAY OUTBURSTS; DATA RELEASE; LUMINOSITY FUNCTION; STELLAR DISRUPTION; SPECTRAL EVOLUTION; ABUNDANCE RATIO; FOLLOW-UP;

D O I：

10.1093/mnras/stae2816

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report a high-redshift (z=1.404) tidal disruption event (TDE) candidate in SDSS J000118.70+003314.0 (SDSS J0001), which is a quasar with apparent broad Mg II emission line. The long-term variability in its nine-year photometric ugriz-band light curves, obtained from the SDSS Stripe82 and the PHOTOOBJALL data bases, can be described by the conventional TDE model. Our results suggest that the TDE is a main-sequence star with mass of 1.905(-0.009)(+0.023) M-circle dot tidally disrupted by a black hole (BH) with mass 6.5(-2.6)(+3.5)x 10(7 )M(circle dot). The BH mass is about 7.5 times smaller than the virial BH mass derived from the broad Mg ii emission line, which can be explained by non-virial dynamic properties of broad emission lines from TDEs debris. Furthermore, we examine the probability that the event results from intrinsic variability of quasars, which is about 0.009 per cent, through applications of the DRW/CAR process. Alternative explanations for the event are also discussed, such as the scenarios of dust obscurations, microlensing and accretion. Our results provide clues to support that TDEs could be detectable in broad line quasars as well as in quiescent galaxies, and to indicate the variability of some active galactic nuclei may be partly attributed to central TDEs.

引用

页码：84 / 96

页数：13

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