Zobrazeno 1 - 10
of 164
pro vyhledávání: '"J. -P. Macquart"'
Autor:
J-P, Macquart, J X, Prochaska, M, McQuinn, K W, Bannister, S, Bhandari, C K, Day, A T, Deller, R D, Ekers, C W, James, L, Marnoch, S, Osłowski, C, Phillips, S D, Ryder, D R, Scott, R M, Shannon, N, Tejos
Publikováno v:
Nature. 581(7809)
More than three-quarters of the baryonic content of the Universe resides in a highly diffuse state that is difficult to detect, with only a small fraction directly observed in galaxies and galaxy clusters
Publikováno v:
The Astrophysical Journal. 715:939-946
We report results from a deep high-frequency search for pulsars within the central parsec of Sgr A* using the Green Bank Telescope. The observing frequency of 15 GHz was chosen to maximize the likelihood of detecting normal pulsars (i.e. with periods
Autor:
W. F. Brisken, J.-P. Macquart, J. J. Gao, B. J. Rickett, W. A. Coles, A. T. Deller, S. J. Tingay, C. J. West
Publikováno v:
The Astrophysical Journal. 708:232-243
We have invented a novel technique to measure the radio image of a pulsar scattered by the interstellar plasma with 0.1 mas resolution. We extend the "secondary spectrum" analysis of parabolic arcs by Stinebring et al. (2001) to very long baseline in
Autor:
Juergen Ott, Tim J. Cornwell, J. P. Macquart, Melanie Johnston-Hollitt, Enno Middelberg, Ron Ekers, Tara Murphy, Ray P. Norris, Ilana Feain, Bryan Gaensler
Publikováno v:
The Astrophysical Journal. 707:114-125
We present the results of an Australia Telescope Compact Array 1.4 GHz spectropolarimetric aperture synthesis survey of 34 square degrees centred on Centaurus A - NGC 5128. A catalogue of 1005 extragalactic compact radio sources in the field to a con
Autor:
James E. J. Lovell, C. Senkbeil, Simon Ellingsen, Giuseppe Cimo, J. P. Macquart, D. L. Jauncey
Publikováno v:
The Astrophysical Journal. 672:L95-L98
We present observations of a rare, rapid, high amplitude Extreme Scattering Event toward the compact BL-Lac AO 0235+164 at 6.65 GHz. The ESE cloud is compact; we estimate its diameter between 0.09 and 0.9 AU, and is at a distance of less than 3.6 kpc
Autor:
J.-P. Macquart
Publikováno v:
The Astrophysical Journal. 658:L1-L4
Both induced Compton scattering and induced Raman scattering strongly limit the observability of the extremely bright ( 10^3 (D/100 Mpc), or if the intrinsic opening angle of the emission is extremely small. Thus the presence or absence of such radio
Publikováno v:
Astronomy & astrophysics, 396(2), 615-621. EDP Sciences
We report the detection of circular polarization during the 1994 outburst of the Galactic microquasar GRO J1655-40. The circular polarization is clearly detected at 1.4 and 2.4 GHz, but not at 4.8 and 8.4 GHz, where its magnitude never exceeds 5 mJy.
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Akademický článek
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Autor:
J. P. Macquart, James E. J. Lovell, Anastasios Tzioumis, D. L. Jauncey, Lucyna Kedziora-Chudczer, Hayley Bignall
We report measurements of time delays of up to 8 minutes in the centimeter wavelength variability patterns of the intra-hour scintillating quasar PKS 1257-326 as observed between the VLA and the ATCA on three separate epochs. These time delays confir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f5ee45749a41d34c1602902e38ab34e
http://arxiv.org/abs/astro-ph/0608619
http://arxiv.org/abs/astro-ph/0608619