Lazio, T.J.W. - Resultados da pesquisa

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The International Pulsar Timing Array second data release: Search for an isotropic Gravitational Wave Background / Antoniadis, J. (FORTH, Heraklion ; Bonn, Max Planck Inst., Radioastron. ; Argelander Inst. Astron.) ; Arzoumanian, Z. (NASA, Goddard) ; Babak, S. (APC, Paris) ; Bailes, M. (Swinburne U. Tech., Hawthorn ; ARC, CoEPP, Australia) ; Nielsen, A.-S. Bak (Bonn, Max Planck Inst., Radioastron. ; Bielefeld U.) ; Baker, P.T. (Widener U.) ; Bassa, C.G. (ASTRON, Dwingeloo) ; Becsy, B. (Montana State U.) ; Berthereau, A. (LPC2E, Orleans ; Station Radioastronomy, Nancay) ; Bonetti, M. (Milan Bicocca U. ; INFN, Milan Bicocca) et al.
We searched for an isotropic stochastic gravitational wave background in the second data release of the International Pulsar Timing Array, a global collaboration synthesizing decadal-length pulsar-timing campaigns in North America, Europe, and Australia. In our reference search for a power law strain spectrum of the form $h_c = A(f/1\,\mathrm{yr}^{-1})^{\alpha}$, we found strong evidence for a spectrally-similar low-frequency stochastic process of amplitude $A = 3.8^{+6.3}_{-2.5}\times10^{-15}$ and spectral index $\alpha = -0.5 \pm 0.5$, where the uncertainties represent 95% credible regions, using information from the auto- and cross-correlation terms between the pulsars in the array. [...]
arXiv:2201.03980.- 2022-01-27 - 15 p. - Published in : Mon. Not. R. Astron. Soc. 510 (2022) 4873 Fulltext: PDF;

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Parallax and Kinematics of PSR B0919+06 from VLBA Astrometry and Interstellar Scintillometry / Chatterjee, S (Cornell U.) ; Cordes, J M (Cornell U.) ; Lazio, T J W (Naval Research Lab, Wash., D.C.) ; Goss, W M (NRAO, Socorro) ; Fomalont, E B (NRAO, Charlottesville) ; Benson, J M (NRAO, Socorro)
Results are presented from a long-term astrometry program on PSR B0919+06 using the NRAO Very Long Baseline Array. With ten observations (seven epochs) between 1994--2000, we measure a proper motion of 18.35 +/- 0.06 mas/yr in RA, 86.56 +/- 0.12 mas/yr in Dec, and a parallax of 0.83 +/- 0.13 mas (68% confidence intervals). [...]
astro-ph/0010060.- 2001 - Published in : Astrophys. J. 550 (2001) 287 Access to fulltext document: PDF; External link: astro-ph/0010060 PDF

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