Event From Date:
Thursday, 12 April 2018
Event End Date:
Thursday, 12 April 2018
Event Title:
SPS organises a seminar by Prof. Ajit M Srivastava
Event Details:
School of Physical Sciences
Jawaharlal Nehru University, New Delhi
High density QCD phase transitions inside neutron stars:glitch and gravitational waves
Prof. Ajit M Srivastava
(IOP, Bhubaneswar)
Date: 12 April -2018
Time: 4 p.m, Thursday
Venue: Seminar Room, SPS
Abstract : During the evolution of a pulsar, various phase transitions may occur in its dense interior, such as transition to various exotic high density phases of QCD. We discuss a technique which allows to probe these phases and associated transitions by detecting changes in rotation of the star arising
from density changes and fluctuations during the transition affecting star's moment of inertia. These results suggest that these changes may be observable in the form of glitches and (recently observed) anti-glitches, and may be used to pin down the specific phase transition occurring inside the pulsar core. Interestingly, rapidly changing quadrupole moment arising from the density fluctuations during the phase transition may provide a new source for gravitational waves which may be detectable in LIGO (with upgrades).