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SUMMARY:High-Energy Radiation from Magnetized Compact Objects: The Case of
  Ultraluminous X-ray Sources
DTSTART:20260824T090000Z
DTEND:20260824T110000Z
DTSTAMP:20260917T111600Z
UID:indico-event-9413@scitalks.tifr.res.in
DESCRIPTION:Speakers: Tanuman Ghosh (IUCAA)\n\nUltra luminous X-ray source
 s (ULXs) provide unique laboratories for studying accretion and radiation 
 under extreme conditions\, with luminosities exceeding the classical Eddin
 gton limit for stellar-mass compact objects. The discovery of pulsating UL
 Xs has established that at least a fraction of these systems host strongly
  magnetized accreting neutron stars. Yet the physical origin of the ubiqui
 tous high-energy spectral curvature around 10 keV in ULXs remains unclear.
  In this talk\, I will present a physically motivated\, angle-dependent sy
 nchrotron emission framework developed to explain the high-energy spectra 
 of magnetized ULXs. Unlike the conventional angle-averaged treatment\, the
  framework retains the intrinsic angular dependence of synchrotron emissio
 n\, allowing the observed spectrum to probe the geometry\, magnetic field\
 , and energetics of the emitting plasma. I will discuss the theoretical fo
 undations of the model and its application to broadband observations of pu
 lsating and hyper luminous ULXs. I will also briefly discuss some recent r
 esults on polarized radiation from strongly magnetized compact objects\, a
 long with multi-wavelength studies of a gamma-ray binary candidate. I will
  conclude by outlining my broader research direction toward relativistic p
 article acceleration\, gamma-ray emission\, and very-high-energy astrophys
 ics\, with future prospects for connecting multi-wavelength observations t
 o investigate radiation and particle acceleration in extreme astrophysical
  plasmas.\n\nhttps://scitalks.tifr.res.in/event/9413/
LOCATION:AG 66 (TIFR\, Mumbai)
URL:https://scitalks.tifr.res.in/event/9413/
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