Zobrazeno 1 - 10
of 394
pro vyhledávání: '"Yardley D"'
Autor:
Keith, M. J., Coles, W., Shannon, R. M., Hobbs, G. B., Manchester, R. N., Bailes, M., Bhat, N. D. R., Burke-Spolaor, S., Champion, D. J., Chaudhary, A., Hotan, A. W., Khoo, J., Kocz, J., Oslowski, S., Ravi, V., Reynolds, J. E., Sarkissian, J., van Straten, W., Yardley, D. R. B.
Signals from radio pulsars show a wavelength-dependent delay due to dispersion in the interstellar plasma. At a typical observing wavelength, this delay can vary by tens of microseconds on five-year time scales, far in excess of signals of interest t
Externí odkaz:
http://arxiv.org/abs/1211.5887
Autor:
Barroso-Sousa, R. †, Barry, W.T., Guo, H., Dillon, D., Tan, Y.B., Fuhrman, K., Osmani, W., Getz, A., Baltay, M., Dang, C., Yardley, D., Moy, B., Marcom, P.K., Mittendorf, E.A., Krop, I.E., Winer, E.P., Tolaney, S.M. *
Publikováno v:
In Annals of Oncology April 2019 30(4):575-581
Autor:
Manchester, R. N., Hobbs, G., Bailes, M., Coles, W. A., van Straten, W., Keith, M. J., Shannon, R. M., Bhat, N. D. R., Brown, A., Burke-Spolaor, S. G., Champion, D. J., Chaudhary, A., Edwards, R. T., Hampson, G., Hotan, A. W., Jameson, A., Jenet, F. A., Kesteven, M. J., Khoo, J., Kocz, J., Maciesiak, K., Oslowski, S., Ravi, V., Reynolds, J. R., Sarkissian, J. M., Verbiest, J. P. W., Wen, Z. L., Wilson, W. E., Yardley, D., Yan, W. M., You, X. P.
A "pulsar timing array" (PTA), in which observations of a large sample of pulsars spread across the celestial sphere are combined, allows investigation of "global" phenomena such as a background of gravitational waves or instabilities in atomic times
Externí odkaz:
http://arxiv.org/abs/1210.6130
Autor:
Ravi, V., Wyithe, J. S. B., Hobbs, G., Shannon, R. M., Manchester, R. N., Yardley, D. R. B., Keith, M. J.
We investigate the effects of gravitational waves (GWs) from a simulated population of binary super-massive black holes (SMBHs) on pulsar timing array datasets. We construct a distribution describing the binary SMBH population from an existing semi-a
Externí odkaz:
http://arxiv.org/abs/1210.3854
Autor:
Hobbs, G., Coles, W., Manchester, R. N., Keith, M. J., Shannon, R. M., Chen, D., Bailes, M., Bhat, N. D. R., Burke-Spolaor, S., Champion, D., Chaudhary, A., Hotan, A., Khoo, J., Kocz, J., Levin, Y., Oslowski, S., Preisig, B., Ravi, V., Reynolds, J. E., Sarkissian, J., van Straten, W., Verbiest, J. P. W., Yardley, D., You, X. P.
Using observations of pulsars from the Parkes Pulsar Timing Array (PPTA) project we develop the first pulsar-based timescale that has a precision comparable to the uncertainties in international atomic timescales. Our ensemble of pulsars provides an
Externí odkaz:
http://arxiv.org/abs/1208.3560
Publikováno v:
Published in the Astrophysical Journal (ApJ, 2011, 730, 29)
Pulsar timing observations are used to place constraints on the rate of coalescence of supermassive black-hole (SMBH) binaries as a function of mass and redshift. In contrast to the indirect constraints obtained from other techniques, pulsar timing o
Externí odkaz:
http://arxiv.org/abs/1103.2808
Autor:
Yardley, D. R. B., Coles, W. A., Hobbs, G. B., Verbiest, J. P. W., Manchester, R. N., van Straten, W., Jenet, F. A., Bailes, M., Bhat, N. D. R., Burke-Spolaor, S., Champion, D. J., Hotan, A. W., Oslowski, S., Reynolds, J. E., Sarkissian, J. M.
We search for the signature of an isotropic stochastic gravitational-wave background in pulsar timing observations using a frequency-domain correlation technique. These observations, which span roughly 12 yr, were obtained with the 64-m Parkes radio
Externí odkaz:
http://arxiv.org/abs/1102.2230
Autor:
Champion, D. J., Hobbs, G. B., Manchester, R. N., Edwards, R. T., Backer, D. C., Bailes, M., Bhat, N. D. R., Burke-Spolaor, S., Coles, W., Demorest, P. B., Ferdman, R. D., Folkner, W. M., Hotan, A. W., Kramer, M., Lommen, A. N., Nice, D. J., Purver, M. B., Sarkissian, J. M., Stairs, I. H., van Straten, W., Verbiest, J. P. W., Yardley, D. R. B.
High-precision pulsar timing relies on a solar-system ephemeris in order to convert times of arrival (TOAs) of pulses measured at an observatory to the solar system barycenter. Any error in the conversion to the barycentric TOAs leads to a systematic
Externí odkaz:
http://arxiv.org/abs/1008.3607
Autor:
Yardley, D. R. B., Hobbs, G. B., Jenet, F. A., Verbiest, J. P. W., Wen, Z. L., Manchester, R. N., Coles, W. A., van Straten, W., Bailes, M., Bhat, N. D. R., Burke-Spolaor, S., Champion, D. J., Hotan, A. W., Sarkissian, J. M.
We present the sensitivity of the Parkes Pulsar Timing Array to gravitational waves emitted by individual super-massive black-hole binary systems in the early phases of coalescing at the cores of merged galaxies. Our analysis includes a detailed stud
Externí odkaz:
http://arxiv.org/abs/1005.1667
Autor:
Verbiest, J. P. W., Bailes, M., Bhat, N. D. R., Burke-Spolaor, S., Champion, D. J., Coles, W., Hobbs, G. B., Hotan, A. W., Jenet, F., Khoo, J., Lee, K. J., Lommen, A., Manchester, R. N., Oslowski, S., Reynolds, J., Sarkissian, J., van Straten, W., Yardley, D. R. B., You, X. P.
Publikováno v:
Class.Quant.Grav.27:084015,2010
The Parkes Pulsar Timing Array project aims to make a direct detection of a gravitational-wave background through timing of millisecond pulsars. In this article, the main requirements for that endeavour are described and recent and ongoing progress i
Externí odkaz:
http://arxiv.org/abs/0912.2692