Global Millimeter VLBI Array Survey of Ultracompact Extragalactic Radio Sources at 86 GHz

Global Millimeter VLBI Array Survey of Ultracompact Extragalactic Radio Sources at 86 GHz PDF Author: Dhanya G. Nair
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Global Millimeter VLBI Array Survey of Ultracompact Extragalactic Radio Sources at 86 GHz

Global Millimeter VLBI Array Survey of Ultracompact Extragalactic Radio Sources at 86 GHz PDF Author: Dhanya G. Nair
Publisher:
ISBN:
Category :
Languages : en
Pages :

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VLBI and Compact Radio Sources

VLBI and Compact Radio Sources PDF Author: Roberto Fanti
Publisher: Springer Science & Business Media
ISBN: 9789027717399
Category : Science
Languages : en
Pages : 522

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Book Description
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.

86 GHz VLBI Survey of Compact Radio Sources

86 GHz VLBI Survey of Compact Radio Sources PDF Author: A. P. Lobanov
Publisher:
ISBN:
Category :
Languages : en
Pages : 22

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Extragalactic Radio Sources

Extragalactic Radio Sources PDF Author: D.S. Heeschen
Publisher: Springer Science & Business Media
ISBN: 9400977816
Category : Science
Languages : en
Pages : 484

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Book Description
IAU Symposium 97, Extragalactic Radio Sources, was held at Albuquerque, New Mexico August 3-7, 1981. It was co-sponsored by IAU Commissions 28, 40, 47 and 48 and by URSI Commission J. Financial and organizational support were provided by the National Radio Astronomy Observatory, the University of New Mexico, and the National Science Foundation. A wide variety of interesting objects and phenomena can be covered under the heading "Extragalactic Radio Sources", and a diverse set of topics was in fact discussed at the symposium. Radio galaxies, quasars, Seyfert galaxies and BL Lacertids received the most attention, but normal galaxies, the galactic center, and even SS433 were also discussed. While the unifying theme of the symposium was radio emission, studies at all wavelengths--X-ray, UV, optical, IR, and radio--were included. In general, the emphasis was on individual objects and the physical processes associated with them, but there were also papers on statistical studies and cosmology. The symposium was attended by 209 scientists from 18 countries.

I. a 22 GHZ VLBI Survey of 140 Compact Extragalactic Radio Sources

I. a 22 GHZ VLBI Survey of 140 Compact Extragalactic Radio Sources PDF Author: George A. Moellenbrock (III.)
Publisher:
ISBN:
Category : BL Lacertae objects
Languages : en
Pages : 183

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Extragalactic Radio Sources

Extragalactic Radio Sources PDF Author: R. Ekers
Publisher: Springer Science & Business Media
ISBN: 9400902956
Category : Science
Languages : en
Pages : 666

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Book Description
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.

VLBI and Compact Radio Sources

VLBI and Compact Radio Sources PDF Author: Roberto Fanti
Publisher: Springer
ISBN: 9789401099387
Category : Science
Languages : en
Pages : 0

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Book Description
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.

The Physics of Extragalactic Radio Sources

The Physics of Extragalactic Radio Sources PDF Author: David De Young
Publisher: University of Chicago Press
ISBN: 9780226144153
Category : Science
Languages : en
Pages : 588

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Book Description
Extragalactic radio sources are among the most unusual and spectacular objects in the universe, with sizes in excess of millions of light years, radiated energies over ten times those of normal galaxies, and a unique morphology. They reveal some of the most dramatic physical events ever seen and provide essential clues to the basic evolutionary tracks followed by all galaxies and groups of galaxies. In The Physics of Extragalactic Radio Sources, David De Young provides a clearly written overview of what is currently known about these objects. A unique feature of the book is De Young's emphasis on the physical processes associated with extragalactic radio sources: their evolution, their environment, and their use as probes to solve other astrophysical problems. He also makes extensive use of the large amount of data now available from observations at x-ray, optical, and radio wavelengths to illustrate his main points. The Physics of Extragalactic Radio Sources will be a comprehensive introduction to the field for graduate students and a useful summary for astrophysicists.

Extragalactic Radio Sources

Extragalactic Radio Sources PDF Author: Wolfgang Priester
Publisher:
ISBN:
Category : Quasars
Languages : en
Pages : 68

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A Northern 2 Jy Sample of Compact Extragalactic Radio Sources Suitable for Millimeter and Space VLBI Observations

A Northern 2 Jy Sample of Compact Extragalactic Radio Sources Suitable for Millimeter and Space VLBI Observations PDF Author: Esko Valtaoja
Publisher:
ISBN: 9789512209095
Category :
Languages : en
Pages : 17

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