Abstract Details
| Name: Sarmistha Banik Affiliation: BITS Pilani, Hyderabad Campus Conference ID: ASI2016_946 Title : Deformation properties of rotating neutron stars with exotic equation of state with density dependent couplings Authors and Co-Authors : 1.Krishna Prakash Nunna BITS Pilani Hyderabad Campus 2. Prasanta Char Saha Institute of Nulcear Physics, Kolkata Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : Pulsars are rotating neutron stars with period ranging from seconds to sub -milliseconds. A small degree of asymmetry arises as a consequence of their rapid rotation. This asymmetry in the spherical mass distribution, in turn creates a distortion in the gravitational field outside the star [1]. The moment of inertia (I), rotational to gravitational energy ratio (T/|W|) and quadrupole moment tensor (φ) are some of the parameters that lead to explore the deformation properties of the neutron stars. The exceptionally dense cores of neutron stars led scientists to believe that apart from neutrons, protons and electrons, these stars are also composed of other sub-atomic strange particles such as hyperons, pion and kaon condensates [2]. Usually, the strangeness degree of freedom softens the Equation of state (EoS), lowering the maximum mass of the compact stars. However, it was shown in Ref [3], that the DD2 models[4] have scope to accommodate strange hyperons and anti-kaon condensates within the observational mass limit. We consider a phase transition from hadronic to anti-kaon condensed matter and study its effect on the bulk properties such as quadrupole moment, moment of inertia and the ratio of rotational energy to gravitational energy for the rotating neutron stars. References: 1.N. Stergioulas, Living Review, 6 (2003), 3. 2. N.K. Glendenning, Compact stars, (Springer, New York, 1997). 3.P. Char, & S. Banik. Phy RevC, 90, 015801 (2014). 4.S. Typel and H. H. Wolter, Nucl. Phys. A656, 331 (1999). |