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SUMMARY:Magnetically Regulated Accretion and Orbital Evolution in Compact 
 Binary Systems [Astrophysics Seminar]
DTSTART:20260820T060000Z
DTEND:20260820T070000Z
DTSTAMP:20260825T103200Z
UID:indico-event-460@events.iiap.res.in
CONTACT:colloqm@iiap.res.in
DESCRIPTION:Speakers: Rahul Sharma (Inter-University Centre for Astronomy 
 and Astrophysics (IUCAA)\, Pune\, India)\n\nAbstractCompact binary systems
  hosting neutron stars and white dwarfs provide powerful laboratories for 
 studying accretion\, magnetism\, and orbital evolution under extreme physi
 cal conditions. In these systems\, the interaction between the accretion f
 low\, the compact object's magnetic field\, and the binary orbit governs t
 he observed emission\, variability\, and long-term dynamical behavior. Und
 erstanding how these processes operate across different magnetic field str
 engths and compact-object masses remains a key area of interest in high-en
 ergy astrophysics. In this talk\, I will present results from my research 
 on accreting neutron stars and magnetic white dwarf binaries\, based on X-
 ray timing and broadband spectral studies. Using observations from multipl
 e space-based X-ray observatories\, I will highlight how coherent pulsatio
 ns\, quasi-periodic oscillations\, broadband noise\, spectral state transi
 tions\, and accretion torque can be used to probe disc-magnetosphere inter
 actions and accretion geometry. I will also discuss how spin evolution and
  torque variability in neutron star systems provide insights into models o
 f magnetically regulated accretion. Beyond their role as high-energy labor
 atories\, compact binaries are also important sources of gravitational-wav
 e emission. I will highlight my work on orbital evolution in eclipsing neu
 tron star systems and double-degenerate white dwarf binaries. Precise timi
 ng measurements in these systems reveal secular orbital decay\, orbital ir
 regularities\, and signatures of complex angular momentum exchange. These 
 studies provide key constraints on mass transfer processes\, magnetic acti
 vity\, and gravitational radiation-driven evolution. I will conclude by ou
 tlining how future observations can further refine this unified picture an
 d advance our understanding of compact binary systems. \n\nhttps://events
 .iiap.res.in/event/460/
LOCATION:IIA Council Room
URL:https://events.iiap.res.in/event/460/
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