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GR: Fachverband Gravitation und Relativitätstheorie

GR 12: Relativistic Astrophysics and Scalar Fields

GR 12.1: Talk

Thursday, March 23, 2023, 14:00–14:20, ZEU/0260

Testing scalar-tensor gravity with radio pulsars — •Alexander Batrakov¹, Huanchen Hu¹, Norbert Wex¹, Paulo Freire¹, Vivek Venkatraman Krishnan¹, and Michael Kramer^1,2 — ¹Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany — ²Jodrell Bank Centre for Astrophysics, The University of Manchester, M13 9PL, United Kingdom

The talk will highlight some of the latest results in testing the strong-field aspects of scalar-tensor gravity (STG) with radio pulsars, which include spontaneous scalarization, dipolar radiation, and the violation of the universality of free fall by strongly self-gravitating bodies. Some of these results are based on a new timing model that provides a fully consistent analysis of pulsar timing data for certain classes of STG theories.