Zobrazeno 1 - 10
of 70
pro vyhledávání: '"I. I. K. Pauliny-Toth"'
Autor:
Richard Schilizzi, Sándor Frey, A. P. Lobanov, L. I. Gurvits, I. I. K. Pauliny-Toth, Noriyuki Kawaguchi
Publikováno v:
The Astrophysical Journal. 547:714-721
We report results of a VLBI Space Observatory Programme (VSOP) observation of a high-redshift quasar, PKS 2215+020 (z = 3.57). The ~1 mas resolution image of the quasar reveals a prominent "core-jet" structure on linear scales from 5 h-1 to 300 h-1 p
Autor:
A. P. Lobanov, Yasuhiro Murata, Noriyuki Kawaguchi, Sándor Frey, I. I. K. Pauliny-Toth, L. I. Gurvits, H. Kobayashi, Kenneth I. Kellermann, Hisashi Hirabayashi, Richard Schilizzi
Publikováno v:
Advances in Space Research. 26:719-722
We present a report in progress on the VSOP study of extremely distant radio quasars. To date the project is less than 15% complete. By means of this contribution we demonstrate our early results in the form of sub-milliarcsecond radio images of thre
Publikováno v:
The Astrophysical Journal. 464:L55-L58
We present 43 GHz VLBA polarization observations of the quasar 3C 454.3 and discuss technical aspects concerning the calibration of millimeter VLBI polarimetry. Significant polarization fine structure is observed near the core of 3C 454.3, with a pre
Publikováno v:
Chinese Astronomy and Astrophysics. 18:20-28
This paper presents some preliminary results of an EVN-SHANGHAI VLBI observation of 4C 39.25 at 18 cm. Complicated morphology of the source on a scale of hundred parsecs and the possible existence of superluminal motion on this scale are indicated. A
Autor:
L. I. Matveenko, I. I. K. Pauliny-Toth
Publikováno v:
International Astronomical Union Colloquium. 164:71-72
The fine core-jet structure of 3C 345 and its low-frequency variability are discussed.
Autor:
B. O. Roênnaêng, D. A. Graham, Makoto Inoue, Norbert Bartel, I. I. K. Pauliny-Toth, Alan E. E. Rogers, Irwin I. Shapiro, Masaki Morimoto, J. H. Spencer, K. J. Johnston, Hisashi Hirabayashi, Thomas P. Krichbaum, V. Dhawan, Roy Booth, A. C. S. Readhead, Bernard F. Burke, J. M. Marcaide, A. Witzel, Charles R. Lawrence
Publikováno v:
The Astrophysical Journal. 360:L43
Second-epoch observations of the nuclear region of 0316 + 413 (3C 84, NGC 1275) were made at 7 mm wavelength with an angular resolution of 100 microarcsec. They confirm the existence of almost perpendicularly oriented components close to the core of
Autor:
D. B. Shaffer, E. Preuss, A. T. Moffet, Richard Schilizzi, R. P. Linfield, A. Witzel, Maurice Cohen, G. A. Seielstad, I. I. K. Pauliny-Toth, Kenneth I. Kellermann, B. J. Geldzahler, J. D. Romney
Publikováno v:
Nature. 268:405-409
Radio data from four extragalactic sources, three quasars and one galaxy, show evidence for an apparent expansion faster than the speed of light. The data on these ‘superluminal’ sources are reviewed, and their implications briefly discussed.
Publikováno v:
Chinese Astronomy and Astrophysics. 11:201-206
VLBI observations at wavelengths of 18 and 6 cm with baselines up to 15 and 23 million wavelengths have been made in a search for structures on scales of 10 to 100 milliarcseconds (mas) in the quasar 4C 39.25. No significant structure on these scales
Autor:
I. I. K. Pauliny-Toth, Kenneth J. Johnston, V. Dhawan, Charles R. Lawrence, A. C. S. Readhead, Bernard F. Burke, Masaki Morimoto, Irwin I. Shapiro, J. H. Spencer, Hisashi Hirabayashi, A. Witzel, Makoto Inoue, B. O. Ronnang, J. M. Marcaide, Thomas P. Krichbaum, Norbert Bartel, Roy Booth, D. A. Graham, Alan E. E. Rogers
Publikováno v:
Nature. 334:131-135
The investigation of the nuclei of galaxies and quasars has been central to modern astronomy. The application of the technique of very-long-baseline interferometry (VLBI) to such sources has allowed the mapping of their angular radio brightness distr
Publikováno v:
Annual Review of Astronomy and Astrophysics. 19:373-410