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Title: THE WISE DETECTION OF AN INFRARED ECHO IN TIDAL DISRUPTION EVENT ASASSN-14li

Abstract

We report the detection of a significant infrared variability of the nearest tidal disruption event (TDE) ASASSN-14li using Wide-field Infrared Survey Explorer and newly released Near-Earth Object WISE Reactivation data. In comparison with the quiescent state, the infrared flux is brightened by 0.12 and 0.16 mag in the W1 (3.4 μ m) and W2 (4.6 μ m) bands at 36 days after the optical discovery (or ∼110 days after the peak disruption date). The flux excess is still detectable ∼170 days later. Assuming that the flare-like infrared emission is from the dust around the black hole, its blackbody temperature is estimated to be ∼2.1 × 10{sup 3} K, slightly higher than the dust sublimation temperature, indicating that the dust is likely located close to the dust sublimation radius. The equilibrium between the heating and radiation of the dust claims a bolometric luminosity of ∼10{sup 43}–10{sup 45} erg s{sup −1}, comparable with the observed peak luminosity. This result has for the first time confirmed the detection of infrared emission from the dust echoes of TDEs.

Authors:
; ; ; ;  [1];  [2]
  1. Key laboratory for Research in Galaxies and Cosmology, Department of Astronomy, The University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026 (China)
  2. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
Publication Date:
OSTI Identifier:
22654231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 828; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; BOLOMETERS; COMPARATIVE EVALUATIONS; DETECTION; DUSTS; EMISSION; EQUILIBRIUM; GALAXIES; GALAXY NUCLEI; INFRARED SURVEYS; LUMINOSITY; REGENERATION; SUBLIMATION

Citation Formats

Jiang, Ning, Dou, Liming, Wang, Tinggui, Yang, Chenwei, Zhou, Hongyan, and Lyu, Jianwei, E-mail: jnac@ustc.edu.cn. THE WISE DETECTION OF AN INFRARED ECHO IN TIDAL DISRUPTION EVENT ASASSN-14li. United States: N. p., 2016. Web. doi:10.3847/2041-8205/828/1/L14.
Jiang, Ning, Dou, Liming, Wang, Tinggui, Yang, Chenwei, Zhou, Hongyan, & Lyu, Jianwei, E-mail: jnac@ustc.edu.cn. THE WISE DETECTION OF AN INFRARED ECHO IN TIDAL DISRUPTION EVENT ASASSN-14li. United States. doi:10.3847/2041-8205/828/1/L14.
Jiang, Ning, Dou, Liming, Wang, Tinggui, Yang, Chenwei, Zhou, Hongyan, and Lyu, Jianwei, E-mail: jnac@ustc.edu.cn. Thu . "THE WISE DETECTION OF AN INFRARED ECHO IN TIDAL DISRUPTION EVENT ASASSN-14li". United States. doi:10.3847/2041-8205/828/1/L14.
@article{osti_22654231,
title = {THE WISE DETECTION OF AN INFRARED ECHO IN TIDAL DISRUPTION EVENT ASASSN-14li},
author = {Jiang, Ning and Dou, Liming and Wang, Tinggui and Yang, Chenwei and Zhou, Hongyan and Lyu, Jianwei, E-mail: jnac@ustc.edu.cn},
abstractNote = {We report the detection of a significant infrared variability of the nearest tidal disruption event (TDE) ASASSN-14li using Wide-field Infrared Survey Explorer and newly released Near-Earth Object WISE Reactivation data. In comparison with the quiescent state, the infrared flux is brightened by 0.12 and 0.16 mag in the W1 (3.4 μ m) and W2 (4.6 μ m) bands at 36 days after the optical discovery (or ∼110 days after the peak disruption date). The flux excess is still detectable ∼170 days later. Assuming that the flare-like infrared emission is from the dust around the black hole, its blackbody temperature is estimated to be ∼2.1 × 10{sup 3} K, slightly higher than the dust sublimation temperature, indicating that the dust is likely located close to the dust sublimation radius. The equilibrium between the heating and radiation of the dust claims a bolometric luminosity of ∼10{sup 43}–10{sup 45} erg s{sup −1}, comparable with the observed peak luminosity. This result has for the first time confirmed the detection of infrared emission from the dust echoes of TDEs.},
doi = {10.3847/2041-8205/828/1/L14},
journal = {Astrophysical Journal Letters},
number = 1,
volume = 828,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}