Download or read book 6 cm VLBI Observations of Compact Radio Sources written by and published by . This book was released on 1981 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLBI and Compact Radio Sources written by Roberto Fanti and published by Springer Science & Business Media. This book was released on 1984-05-31 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: I.A.U. symposium No. 110 on VLBI and Compact Radio Sources was held in Bologna, Italy from June 27 to July 1, 1983. 166 participants from 19 countries were registered and 106 invited and contributed papers were registered. The scientific presentations and discussion concentrated on VLBI observation and interpretation of galactic and extragalactic radio sour ces, including topics as diverse as quasars and galactic nuclei, inter stellar masers, pulsars, and astrometry. Geodetic applications and tech nical development were treated only briefly, as these topics have been the subject of other recent international symposia. Since the first VLBI observations in 1967, sensitivity, resolution, and image quality have improved dramatically. Radio maps shown at the symposium were of comparable quality to conventional synthesis maps be ing made at the time of the first VLBI experiments 15 years ago, but with a resolution more than a factor of 1000 better. We wanted to accommodate the large number of contributed papers in this rapidly developing field, but there was inadequate time for normal oral presentations and discussion. We therefore asked that all contrib uted papers be put on display for at least 24 hours prior to a brief oral summary. A question and discussion period followed groups of oral pres entations on the same or similar topic. In this way the opportunity for interactive discussion, not available in conventional poster displays, was preserved.
Download or read book VLBI and Compact Radio Sources written by Roberto Fanti and published by Springer. This book was released on 1984-06-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: I.A.U. symposium No. 110 on VLBI and Compact Radio Sources was held in Bologna, Italy from June 27 to July 1, 1983. 166 participants from 19 countries were registered and 106 invited and contributed papers were registered. The scientific presentations and discussion concentrated on VLBI observation and interpretation of galactic and extragalactic radio sour ces, including topics as diverse as quasars and galactic nuclei, inter stellar masers, pulsars, and astrometry. Geodetic applications and tech nical development were treated only briefly, as these topics have been the subject of other recent international symposia. Since the first VLBI observations in 1967, sensitivity, resolution, and image quality have improved dramatically. Radio maps shown at the symposium were of comparable quality to conventional synthesis maps be ing made at the time of the first VLBI experiments 15 years ago, but with a resolution more than a factor of 1000 better. We wanted to accommodate the large number of contributed papers in this rapidly developing field, but there was inadequate time for normal oral presentations and discussion. We therefore asked that all contrib uted papers be put on display for at least 24 hours prior to a brief oral summary. A question and discussion period followed groups of oral pres entations on the same or similar topic. In this way the opportunity for interactive discussion, not available in conventional poster displays, was preserved.
Download or read book VLBI Observations of Compact Double Radio Sources written by Mark Warren Hodges and published by . This book was released on 1984 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLBI Observations of the Compact Radio Source in the Center of the Galaxy written by K. Y. Lo and published by . This book was released on 1975 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The detection of a compact radio source in the direction of the Galactic Center during VLBI observations at 3.7 cm on 19 May, 1975 between the Owens Valley Radio Observatory 40-m telescope and the Goldstone 64-m telescope is reported. The recording of the signals and the subsequent cross-correlation were made with the standard MkII VLBI system with a bandwidth of 2 MHz.
Download or read book VLBI Observations of a Flux limited Sample of Compact Radio Sources written by Antonios G. Polatidis and published by . This book was released on 1993 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Observations of Compact Radio Sources at 6 and 18 CM written by K. I. Kellermann and published by . This book was released on 1971 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The small scale structure of extragalactic radio sources has been studied at 18 and 6 cm wavelengths using a tape recording interferometer. At the longest antenna spacing, 10,536 km, the baselines at 6 cm was 176 million wavelengths and the resolution was about 0.0004 arc seconds for the stronger sources. Many sources, including optically identified galaxies and quasars, are found to have several distinct components of widely differing size in the range from the few hundredths of a second of arc to the limit of our resolution. Many sources, including 0106+01, 3C 273, 3C279, 1555+00, 2145+06, 3C 446, 3C 454.3, and 2345-16 all contain components which are unresolved on the longest baseline are less than .0004 arc sec. in diameter. Observations at shorter wavelengths are required to resolve these sources. Because the maximum brightness temperature is limited to 10 to the 12th power K, by inverse Compton scattering, baselines no greater than the diameter of the earth are probably adequate to resolve all of the stronger extragalactic sources. (Author).
Download or read book High Resolution Observations of Compact Radio Sources at Thirteen Centimeters Part Two written by John J. Broderick and published by . This book was released on 1972 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLBI and Compact Radio Sources written by Roberto Fanti and published by . This book was released on 1984 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reprints National Radio Astronomy Observatory Green Bank W Va written by National Radio Astronomy Observatory (U.S.) and published by . This book was released on 1977 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parsec Scale Radio Jets written by J. Anton Zensus and published by Cambridge University Press. This book was released on 1990-08-16 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quasars and active galaxies are the most powerful emitters of radiation in the universe. Modern radio telescope arrays have shown that the ultimate energy source resides in the central few parsecs of the galactic nucleus, and powers the emitting regions by way of two oppositely-directed relativistic jets of energy. This volume presents the latest observations and theories of these remarkable objects. Topics discussed include superluminal motions, the physics of jets and shock fronts in jets, related optical observations, and cosmic evolution. Particular attention is given to the "unified theories," which attempt to show that many of the phenomena in powerful extragalactic objects are different aspects of a single, basic mechanism; the main difference in their appearance is a result of their different orientation with respect to the observer.
Download or read book Extragalactic Radio Sources written by R. Ekers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the 100th anniversary of Marconi's successful experiment on radio broadcasting, 250 astronomers from all over the world met in Bologna (Italy) for five days, to update their knowledge of the physics and statistical properties of powerful extragalactic radio sources. Since their discovery in the fifties enormous progress has been made. The existence of superluminal motions in the cores of radio sources, the presence there of a black hole surrounded by an absorbing dust torus, as inferred mostly from studies at other wavelengths, are now accepted ideas. Nevertheless, in spite of these efforts, there are many questions still unanswered. For instance we do not know which mechanism produces the huge amount of energy supplied to radio sources, how the jets connecting the `engine' to the lobes are formed and collimated, which of the differences observed among the various classes of radio sources are apparent and which are real. These and other related topics are discussed in this book.
Download or read book A Northern 2 Jy Sample of Compact Extragalactic Radio Sources Suitable for Millimeter and Space VLBI Observations written by Esko Valtaoja and published by . This book was released on 1991 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 22 2 GHz VLBI Observations of the Radio Source 0552 398 DA 193 written by Alan Lee Fey and published by . This book was released on 1984 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLBI and Compact Radio Sources written by Roberto Fanti and published by . This book was released on 1984 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Literature 1981 Part 1 written by Siegfried Böhme and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:
