Tests of Gravitational Symmetries with Pulsar Binary J1713+0747

Zhu WW, Desvignes G, Wex N, Caballero RN, Champion DJ, Demorest PB, Ellis JA, Janssen GH, Kramer M, Krieger A, Lentati L, et al. (2019)
Monthly Notices of the Royal Astronomical Society 482(3): 3249-3260.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Symmetries play an important role in modern theories of gravity. The strong equivalence principle (SEP) constitutes a collection of gravitational symmetries which are all implemented by general relativity. Alternative theories, however, are generally expected to violate some aspects of SEP. We test three aspects of SEP using observed change rates in the orbital period and eccentricity of binary pulsar J1713+0747: 1. the gravitational constant's constancy as part of locational invariance of gravitation; 2. the post-Newtonian parameter $\hat{\alpha}_3$ in gravitational Lorentz invariance; 3. the universality of free fall (UFF) for strongly self-gravitating bodies. Based on the pulsar timing result of the combined dataset from the North American Nanohertz Gravitational Observatory (NANOGrav) and the European Pulsar Timing Array (EPTA), we find $\dot{G}/G = (-0.1 \pm 0.9) \times 10^{-12}\,{\rm yr}^{-1}$, which is weaker than Solar system limits, but applies for strongly self-gravitating objects. Furthermore, we obtain the constraints $|\Delta|< 0.002$ for the UFF test and $-3\times10^{-20} < \hat{\alpha}_3 < 4\times10^{-20}$ at 95% confidence. These are the first direct UFF and $\hat{\alpha}_3$ tests based on pulsar binaries, and they overcome various limitations of previous tests.
Erscheinungsjahr
2019
Zeitschriftentitel
Monthly Notices of the Royal Astronomical Society
Band
482
Ausgabe
3
Seite(n)
3249-3260
ISSN
0035-8711
eISSN
1365-2966
Page URI
https://pub.uni-bielefeld.de/record/2918523

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Zhu WW, Desvignes G, Wex N, et al. Tests of Gravitational Symmetries with Pulsar Binary J1713+0747. Monthly Notices of the Royal Astronomical Society. 2019;482(3):3249-3260.
Zhu, W. W., Desvignes, G., Wex, N., Caballero, R. N., Champion, D. J., Demorest, P. B., Ellis, J. A., et al. (2019). Tests of Gravitational Symmetries with Pulsar Binary J1713+0747. Monthly Notices of the Royal Astronomical Society, 482(3), 3249-3260. doi:10.1093/mnras/sty2905
Zhu, W. W., Desvignes, G., Wex, N., Caballero, R. N., Champion, D. J., Demorest, P. B., Ellis, J. A., Janssen, G. H., Kramer, M., Krieger, A., et al. (2019). Tests of Gravitational Symmetries with Pulsar Binary J1713+0747. Monthly Notices of the Royal Astronomical Society 482, 3249-3260.
Zhu, W.W., et al., 2019. Tests of Gravitational Symmetries with Pulsar Binary J1713+0747. Monthly Notices of the Royal Astronomical Society, 482(3), p 3249-3260.
W.W. Zhu, et al., “Tests of Gravitational Symmetries with Pulsar Binary J1713+0747”, Monthly Notices of the Royal Astronomical Society, vol. 482, 2019, pp. 3249-3260.
Zhu, W.W., Desvignes, G., Wex, N., Caballero, R.N., Champion, D.J., Demorest, P.B., Ellis, J.A., Janssen, G.H., Kramer, M., Krieger, A., Lentati, L., Nice, D.J., Ransom, S.M., Stairs, I.H., Stappers, B.W., Verbiest, J., Arzoumanian, Z., Bassa, C.G., Burgay, M., Cognard, I., Crowter, K., Dolch, T., Ferdman, R.D., Fonseca, E., Gonzalez, M.E., Graikou, E., Guillemot, L., Hessels, J.W.T., Jessner, A., Jones, G., Jones, M.L., Jordan, C., Karuppusamy, R., Lam, M.T., Lazaridis, K., Lazarus, P., Lee, K.J., Levin, L., Liu, K., Lyne, A.G., McKee, J.W., McLaughlin, M.A., Oslowski, S., Pennucci, T., Perrodin, D., Possenti, A., Sanidas, S., Shaifullah, G., Smits, R., Stovall, K., Swiggum, J., Theureau, G., Tiburzi, C.: Tests of Gravitational Symmetries with Pulsar Binary J1713+0747. Monthly Notices of the Royal Astronomical Society. 482, 3249-3260 (2019).
Zhu, W. W., Desvignes, G., Wex, N., Caballero, R. N., Champion, D. J., Demorest, P. B., Ellis, J. A., Janssen, G. H., Kramer, M., Krieger, A., Lentati, L., Nice, D. J., Ransom, S. M., Stairs, I. H., Stappers, B. W., Verbiest, Joris, Arzoumanian, Z., Bassa, C. G., Burgay, M., Cognard, I., Crowter, K., Dolch, T., Ferdman, R. D., Fonseca, E., Gonzalez, M. E., Graikou, E., Guillemot, L., Hessels, J. W. T., Jessner, A., Jones, G., Jones, M. L., Jordan, C., Karuppusamy, R., Lam, M. T., Lazaridis, K., Lazarus, P., Lee, K. J., Levin, L., Liu, K., Lyne, A. G., McKee, J. W., McLaughlin, M. A., Oslowski, Stefan, Pennucci, T., Perrodin, D., Possenti, A., Sanidas, S., Shaifullah, Golam, Smits, R., Stovall, K., Swiggum, J., Theureau, G., and Tiburzi, Caterina. “Tests of Gravitational Symmetries with Pulsar Binary J1713+0747”. Monthly Notices of the Royal Astronomical Society 482.3 (2019): 3249-3260.

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