Improved Universality in the Neutron Star Three-Hair Relations

Show simple item record Majumder, Barun Yagi, Kent Yunes, Nicolas 2015-04-26T17:34:05Z 2015-04-26T17:34:05Z 2015-04
dc.identifier.citation Majumder, Barun; Yagi, Kent and Yunes, Nicolas, “Improved Universality in the Neutron Star Three-Hair Relations”, arXiv, Cornell University Library, DOI: arXiv:1504.02506, Apr. 2015. en_US
dc.description.abstract No-hair like relations between the multipole moments of the exterior gravitational field of neutron stars have recently been found to be approximately independent of the star's internal structure. This approximate, equation-of-state universality arises after one adimensionalizes the multipole moments appropriately, which then begs the question of whether there are better ways to adimensionalize the moments to obtain stronger universality. We here investigate this question in detail by considering slowly-rotating neutron stars both in the non-relativistic limit and in full General Relativity. We find that there exist normalizations that lead to stronger equation-of-state universality in the relations among the moment of inertia and the quadrupole, octopole and hexadecapole moments of neutron stars. We determine the optimal normalization that minimizes the equation-of-state dependence in these relations. The results found here may have applications in the modeling of X-ray pulses and atomic line profiles from millisecond pulsars with NICER and LOFT. en_US
dc.description.statementofresponsibility by Barun Majumder, Kent Yagi and Nicolas Yunes
dc.language.iso en en_US
dc.publisher Cornell University Library en_US
dc.subject Adimensionalizes en_US
dc.subject Hexadecapole en_US
dc.subject Multipole moments en_US
dc.subject Octopole en_US
dc.title Improved Universality in the Neutron Star Three-Hair Relations en_US
dc.type Preprint en_US

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