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SUMMARY:Infrared Dust Echoes and Extreme Coronal Lines: SMBH Environments 
 Unveiled by TDEs
DTSTART;VALUE=DATE-TIME:20230629T110000Z
DTEND;VALUE=DATE-TIME:20230629T111500Z
DTSTAMP;VALUE=DATE-TIME:20260306T085043Z
UID:indico-contribution-828@cern.ch
DESCRIPTION:Speakers: Megan Newsome (UC Santa Barbara\, Las Cumbres Observ
 atory)\nWhen stars approach the tidal radius of a supermassive black hole 
 (SMBH) and find themselves unraveled\, the resulting debris stream spirals
  toward the SMBH and creates a flare whose light can outshine the host gal
 axy. These tidal disruption events (TDEs) can be used for independent meas
 ures of black hole masses\, and they offer new windows to study accretion 
 onset and flaring mechanisms near SMBHs. Only recently\, though\, have TDE
 s offered us glimpses into the sub-parsec local environments near SMBHs. A
 T 2020mot is a typical UV/optical TDE\, but is uniquely bright in the near
 -infrared and even shows a later enhancement in brightness along the tail 
 of the light curve. This could be the first TDE to show two "dust echoes\,
 " indicative of concentric rings of thin dust within 0.1 parsecs of a SMBH
 \, among the smallest scales at which dust has been inferred near SMBHs. S
 imilarly\, the recent event AT 2022upj is an extreme coronal line emitter 
 (ECLE) that shares emission line diagnostics in common with the small subs
 et of ECLEs designated as TDEs. This class of events has been interpreted 
 as another form of a "light echo" of TDEs in gas-rich environments. Events
  like AT 2020mot and AT 2022upj are novel opportunities to peer into the c
 losest material of otherwise invisible black holes in quiet galaxies. Stud
 ying these events will explore the fundamental connections between superma
 ssive black holes\, galaxy evolution\, and accretion mechanics.\n\nhttps:/
 /indico.unina.it/event/61/contributions/828/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/828/
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