Gravitational antiscreening in stellar interiors
Abstract
A new class of relativistic stellar structure equations which include the effects of an energydependent Newton coupling is presented. Significant modifications in the massradius relation for neutron stars are possible only if the running of the Newton coupling due to quantum gravity occurs at low energies. A new Buchdahl limit is derived and its physical implications are discussed. In particular, subPlanckian selfgravitating objects with arbitrarily small radii are possible.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 January 2020
 DOI:
 10.1088/14757516/2020/01/022
 arXiv:
 arXiv:1910.11393
 Bibcode:
 2020JCAP...01..022B
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena;
 High Energy Physics  Theory
 EPrint:
 19 pages, 3 figures. V2: minor changes, references added. Matches published version