Phase transitions in neutron star and magnetars and their connection with high energetic bursts in astrophysics
arXiv:1208.2499 · doi:10.1016/j.nuclphysa.2013.11.009
Abstract
The phase transition from normal hadronic matter to quark matter in neutron stars (NS) could give rise to several interesting phenomena. Compact stars can have such exotic states up to their surface (called strange stars (SS)) or they can have quark core surrounded by hadronic matter, known as hybrid stars (HS). As the state of matter of the resultant SS/HS is different from the initial hadronic matter, their masses also differ. Therefore, such conversion leads to huge energy release, sometimes of the order of ergs. In the present work we study the qualitative energy released by such conversion. Recent observations reveal huge surface magnetic field in certain stars, termed magnetars. Such huge magnetic fields can modify the equations of state (EOS) of the matter describing the star. Therefore, the mass of magnetars are different from normal NS. The energy released during the conversion process from neutron magnetar (NM) to strange magnetar/hybrid magnetar (SS/HS) is different from normal NS to SS/HS conversion. In this work we calculate the energy release during the phase transition in magnetars. The energy released during NS to SS/HS conversion exceeds the energy released during NM to SM/HM conversion. The energy released during the conversion of NS to SS is always of the order of ergs. The amount of energy released during such conversion can only be compared to the energy observed during the gamma ray bursts (GRB). The energy liberated during NM to HM conversion is few times lesser, and is not likely to power GRB at cosmological distances. However, the magnetars are more likely to lose their energy from the magnetic poles and can produce giant flares, which are usually associated with magnetars.
14 pages, 4 figures, 4 tables
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Cited by in corpus (14)
- Effects of the quark-hadron phase transition on highly magnetized neutron stars
- Studies of the structure of massive hybrid stars within a modified NJL model
- Studies of two-solar-mass hybrid stars within the framework of Dyson-Schwinger equations
- Studies of the hybrid star structure within 2+1 flavors NJL model
- Dynamical phase transition in neutron stars
- Phase transition in compact stars due to a violent shock
- Effect of strong magnetic field on competing order parameters in two-flavor dense quark matter
- Recent progresses in strange quark stars
- A Hydrodynamical Study on the Conversion of Hadronic Matter to Quark Matter: I. Shock-Induced Conversion
- Spin-down induced quark-hadron phase transition in cold isolated neutron stars
- Effect of magnetic field on the burning of a neutron star
- Maximum mass of hybrid star formed via shock induced phase transition in cold neutron stars
- Effects of Nontrivial Topology on Neutron Star Rotation and its Potential Observational Implications
- Magnetized taub adiabat and the PT of magnetic neutron stars