Journal
SCIENCE
Volume 340, Issue 6131, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1233232
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Funding
- European Research Council for the ERC Starting Grant BEACON [279702]
- West Virginia Experimental Program to Stimulate Competitive Research Challenge Grant
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fonds Quebecois de la Recherche sur la Nature et les Technologies via le Centre de Recherche Astrophysique du Quebec
- Canadian Institute for Advanced Research
- NSERC
- Science and Technology Facilities Council
- VLT of the European Southern Observatory (ESO) [088.D-0138A]
- Science and Technology Facilities Council [ST/K002783/1, ST/J001589/1, ST/I001719/1] Funding Source: researchfish
- STFC [ST/I001719/1, ST/J001589/1, ST/K002783/1] Funding Source: UKRI
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Many physically motivated extensions to general relativity (GR) predict substantial deviations in the properties of spacetime surrounding massive neutron stars. We report the measurement of a 2.01 +/- 0.04 solar mass (M-circle dot) pulsar in a 2.46-hour orbit with a 0.172 +/- 0.003 M-circle dot white dwarf. The high pulsar mass and the compact orbit make this system a sensitive laboratory of a previously untested strong-field gravity regime. Thus far, the observed orbital decay agrees with GR, supporting its validity even for the extreme conditions present in the system. The resulting constraints on deviations support the use of GR-based templates for ground-based gravitational wave detectors. Additionally, the system strengthens recent constraints on the properties of dense matter and provides insight to binary stellar astrophysics and pulsar recycling.
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