GRAVITATIONAL WAVES FROM PULSARS AND THEIR BRAKING INDICES: THE ROLE OF A TIME DEPENDENT MAGNETIC ELLIPTICITY

ABSTRACT We study the role of time dependent magnetic ellipticities ( ) on the calculation of the braking index of pulsars. Moreover, we study the consequences of such a on the amplitude of gravitational waves (GWs) generated by pulsars with measured braking indices. We show that, since the elliptic...

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Bibliographic Details
Published in:The Astrophysical journal 2016-11, Vol.831 (1), p.35
Main Authors: de Araujo, José C. N., Coelho, Jaziel G., Costa, César A.
Format: Article
Language:English
Subjects:
Amplitudes
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Braking
Ellipticity
GRAVITATIONAL WAVES
Gravity waves
MAGNETIC DIPOLES
NEUTRON STARS
PULSARS
pulsars: general
stars: neutron
TIME DEPENDENCE
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Summary:ABSTRACT We study the role of time dependent magnetic ellipticities ( ) on the calculation of the braking index of pulsars. Moreover, we study the consequences of such a on the amplitude of gravitational waves (GWs) generated by pulsars with measured braking indices. We show that, since the ellipticity generated by the magnetic dipole is extremely small, the corresponding amplitude of GWs is much smaller than the amplitude obtained via the spindown limit.
ISSN:0004-637X
1538-4357
DOI:10.3847/0004-637X/831/1/35