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SUMMARY:Low to high frequency QPOs from sources containing stellar mass bl
 ack holes
DTSTART:20260724T060000Z
DTEND:20260724T070000Z
DTSTAMP:20260803T014300Z
UID:indico-event-9390@scitalks.tifr.res.in
DESCRIPTION:Speakers: Indranil Chattopadhyay (ARIES\, Nainital)\n\nBlack-h
 ole microquasars generally show low frequency quasi periodic oscillations 
 (LFQPO) in their hard and intermediate spectral states. LFQPO are oscillat
 ions in the hard-powerlaw part of the X-ray spectra\, where the oscillatio
 n frequencies are in the range of just under 1 Hz to about 20 Hz\, but gen
 erally around few Hz. LFQPOs have been extensively studied. Even relations
  between QPO frequency and the spectral index of the power law tail have b
 een emperically obtained by numerous observations.  However  HFQPO (>50
  Hz) have been detected only in a few observations. In this talk we show t
 hat shock oscillations in transonic accretion discs around rapidly rotatin
 g blackholes can explain both low- and high-frequency QPOs.\n\nhttps://sci
 talks.tifr.res.in/event/9390/
LOCATION:AG-69 (https://tifr-res-in.zoom.us/j/97278721020?pwd=IMBfajtfounN
 28rlGpTC0Gg4SDaalO.1  Meeting ID: 972 7872 1020 Passcode: 659023)
URL:https://scitalks.tifr.res.in/event/9390/
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