Thin accretion disks around neutron and quark stars

Abstract

The possibility of observationally discriminating between various types of neutron stars, described by different equations of state of the nuclear matter, as well as differentiating neutron stars from other types of exotic objects, like, for example, quark stars, is one of the fundamental problems in contemporary astrophysics. We consider and investigate carefully the possibility that different types of rapidly rotating neutron stars, as well as other type of compact general relativistic objects, can be differentiated from the study of the emission properties of the accretion disks around them. We obtain the energy flux, the temperature distribution and the emission spectrum from the accretion disks around several classes of rapidly rotating neutron stars, described by different equations of state of the neutron matter, and for quark stars, described by the MIT bag model equation of state and in the CFL (Color-Flavor-Locked) phase, respectively. Particular signatures appear in the electromagnetic spectrum, thus leading to the possibility of directly testing the equation of state of the dense matter by using astrophysical observations of the emission spectra from accretion disks.

11 pages, accepted for publication in Astron. Astrophys

References in corpus (7)

• Color superconductivity in dense quark matter
• Thin accretion disks in stationary axisymmetric wormhole spacetimes
• Electromagnetic signatures of thin accretion disks in wormhole geometries
• Thin accretion disks in f(R) modified gravity models
• Thin accretion disks onto brane world black holes
• Accretion disk onto boson stars: a way to supplant black holes candidates
• Electron-positron pair production in the electrosphere of quark stars

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