Speaker
Dr
V. Sreekanth
(Amrita Vishwa Vidyapeethom, Coimbatore)
Description
A rotating neutron star with hyperonic core described by an effective chiral model with $\sigma-\rho$ cross coupling within mean field approximation is considered. The hyperonic bulk viscosity coefficient caused by non-leptonic weak interactions is calculated and its role in suppressing the gravitationally driven $r$-modes is investigated. Various other relevant damping timescales are calculated and are used to obtain the $r$-mode instability window. Our model predicts a significant reduction of the unstable region between $10^8 - 10^9$ K due to hyperon bulk viscosity alone.
| Session | Heavy Ions and QCD |
|---|
Authors
Ms
O. P. Jyothilakshmi
(Amrita Vishwa Vidyapeethom, Coimbatore)
Mr
P. E. Sravan Krishnan
(Amrita Vishwa Vidyapeethom, Coimbatore)
Mr
Prashant Thakur
(BITS-Pilani Goa)
Dr
V. Sreekanth
(Amrita Vishwa Vidyapeethom, Coimbatore)
Dr
T. K. Jha
(BITS-Pilani, Goa)
