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Abstract

Axial w-modes of neutron stars with exotic matter

We discuss the composition and equation of state of dense matter in neutron star interior using axial w-modes. We obtain complex frequencies of axial w-modes for equations of state involving hyperons as well as Bose-Einstein condensates of antikaons. The presence of condensates may lead to the appearance of a new stable branch of superdense stars beyond the neutron star branch called the third family. The existence of same mass compact stars in both branches are known as neutron star twins. Further we discuss first axial w-mode frequencies of superdense stars in the third family and those of the corresponding twins in the neutron star branch.

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