J 2015

Braking index of isolated pulsars

URBANCOVÁ, Gabriela, Martin URBANEC, Oliver HAMIL and Jiřina ŘÍKOVSKÁ STONE

Basic information

Original name

Braking index of isolated pulsars

Authors

URBANCOVÁ, Gabriela, Martin URBANEC, Oliver HAMIL and Jiřina ŘÍKOVSKÁ STONE

Edition

Physical Review D, US - Spojené státy americké, 2015, 1550-7998

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Organization unit

Faculty of Philosophy and Science in Opava

UT WoS

000351428400001

Keywords in English

rotating relativistic stars; braking index; equation of state

Tags

International impact, Reviewed

Links

EE2.3.20.0071, research and development project. GPP209/12/P740, research and development project.
Změněno: 14/4/2021 15:45, Mgr. Pavlína Jalůvková

Abstract

V originále

Isolated pulsars are rotating neutron stars with accurately measured angular velocities Omega, and their time derivatives that show unambiguously that the pulsars are slowing down. Although the exact mechanism of the spin-down is a question of detailed debate, the commonly accepted view is that it arises through emission of magnetic dipole radiation (MDR) from a rotating magnetized body. The calculated energy loss by a rotating pulsar with a constant moment of inertia is assumed proportional to a modeldependent power of Omega. This relation leads to the power law (Omega) over dot = -K Omega^n where n is called the braking index. The aim of this work is to determine the deviation of the value of n from the canonical n = 3 for a star with a frequency dependent moment of inertia in the region of frequencies from zero (static spherical star) to the Kepler velocity (onset of mass shedding by a rotating deformed star), in the macroscopic MDR model. We use microscopic realistic equations of