Thursday, November 18, 2010
The Chameleon and the Giant
A Chameleon scalar field in scalar-tensor gravity is a field that modifies the strength of gravity at low densities and large length scales. It disappears below a thin layer of high density material, so it would affect the structure of most stars. However, the outer layers of giant stars especially supergiants like Betelgeuse are essentially hot vacuums, so the chameleon would not be fully shielded here and would change the structure of these stars.
arXiv:1011.4107 [pdf, ps, other]
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