English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This paper investigates eleven (UV-)optical-infrared (IR) spectral energydistributions (SEDs) of six tidal disruption events (TDEs), which areASASSN-14li, ASASSN-15lh, ASASSN-18ul, ASASSN-18zj, PS18kh, and ZTF18acaqdaa.We find that all the SEDs show evident IR excesses. We invoke the blackbodyplus dust emission model to fit the SEDs, and find that the model can accountfor the SEDs. The derived masses of the dust surrounding ASASSN-14li,ASASSN-15lh, ASASSN-18ul, ASASSN-18zj, PS18kh, and ZTF18acaqdaa arerespectively $\sim0.7-1.0\,(1.5-2.2)\times10^{-4}\,M_\odot$,$\sim0.6-3.1\,(1.4-6.3)\times10^{-2}\,M_\odot$,$\sim1.0\,(2.8)\times10^{-4}\,M_\odot$,$\sim0.1-1.6\,(0.3-3.3)\times10^{-3}\,M_\odot$,$\sim1.0\,(2.0)\times10^{-3}\,M_\odot$, and $\sim1.1\,(2.9)\times10^{-3}\,M_\odot$, if the dust is graphite (silicate). Thetemperature of the graphite (silicate) dust of the six TDEs are respectively$\sim1140-1430\,(1210-1520)$\,K, $\sim1030-1380\,(1100-1460)$\,K,$\sim1530\,(1540)$\,K, $\sim960-1380\,(1020-1420)$\,K, $\sim900\,(950)$\,K, and$\sim1600\,(1610)$\,K. By comparing the derived temperatures to thevaporization temperature of graphite ($\sim 1900$\,K) and silicate ($\sim1100-1500$\,K), we suggest that the IR excesses of PS18kh can be explained byboth the graphite and silicate dust, the rest five TDEs favor the graphite dustwhile the silicate dust model cannot be excluded. Moreover, we demonstrate thelower limits of the radii of the dust shells surrounding the six TDEs aresignificantly larger than those of the radii of the photospheres at the firstepochs of SEDs, indicating that the dust might exist before the the TDEsoccurred.

The Study of Dust Formation of Six Tidal Disruption Events