Measuring the Gravitational Constant in the Large Magellanic Cloud

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Astrophysics of Galaxies

Solar and Stellar Astrophysics

General Relativity and Quantum Cosmology

High Energy Physics - Phenomenology

Measuring the Gravitational Constant in the Large Magellanic Cloud

A 5% measurement of the gravitational constant in the Large Magellanic Cloud

We perform a novel test of general relativity by measuring the gravitational constant in the large magellanic cloud (lmc).

The lmc contains six well-studied cepheid variable stars in detached eclipsing binaries.

Radial velocity and photometric observations enable a complete orbital solution, and precise measurements of the periods permit detailed stellar modelling.

We jointly fit the observations for stellar parameters and the gravitational constant, and constrain the gravitational constant in the large magellanic cloud relative to the solar system to be.

We discuss the implications of this 5% measurement of newton s constant in another galaxy for dark energy and modified gravity theories.

Authors

Harry Desmond, Jeremy Sakstein, Bhuvnesh Jain

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