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Constraining a possible time-variation of the gravitational constant through “gravitochemical heating” of neutron stars

Published online by Cambridge University Press:  21 October 2010

Andreas Reisenegger ,
Paula Jofré  and
Rodrigo Fernández
Andreas Reisenegger
Affiliation:
Depto. de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Santiago, Chile email: areisene@astro.puc.cl
Paula Jofré
Affiliation:
Max-Planck-Institut für Astrophysik, Garching, Germany
Rodrigo Fernández
Affiliation:
Department of Astronomy and Astrophysics, University of Toronto, Toronto, CanadaPresent address: Institute for Advanced Study, Princeton, USA
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Abstract

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A hypothetical time-variation of the gravitational constant G would produce gravitochemical heating of old (≳ 107−8 yr) neutron stars. It could produce detectable thermal ultraviolet emission from such stars for changes as small as |Ġ/G|~ 10−12 yr−1, comparable to the best existing upper limits from other methods.

Keywords

Stars: NeutronDense matterGravitationRelativityPulsars: generalPulsars: individual (PSR J0437-4715)Ultraviolet: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 314
Copyright
Copyright © International Astronomical Union 2010

References

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