Precision timing of PSR J1012+5307 and strong-field GR tests
Kosmas Lazaridis, Norbert Wex, Axel Jessner, Michael Kramer, J. Anton, Zensus, Ben W. Stappers, Gemma H. Janssen, Mark B. Purver, Andrew G. Lyne,, Christine A. Jordan, Gregory Desvignes, Ismael Cognard, Gilles Theureau
TL;DR
This paper presents high-precision timing of the pulsar-white dwarf binary PSR J1012+5307 over 15 years, providing new tests of strong-field gravity and limits on alternative gravitational theories.
Contribution
It offers the first long-term, multi-telescope timing analysis of PSR J1012+5307, enabling theory-independent constraints on dipole radiation and gravitational constant variation.
Findings
Measurement of orbital period variation
Limits on dipole radiation
Constraints on gravitational constant variation
Abstract
We report on the high precision timing analysis of the pulsar-white dwarf binary PSR J1012+5307. Using 15 years of multi-telescope data from the European Pulsar Timing Array (EPTA) network, a significant measurement of the variation of the orbital period is obtained. Using this ideal strong-field gravity laboratory we derive theory independent limits for both the dipole radiation and the variation of the gravitational constant.
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