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33 results on '"SCHILIZZI, RICHARD T."'

1. Site Selection Story, 2002–2006: Shortlist

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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2. SKA Headquarters: Another Two-Stage Site Selection Tussle

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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3. Large Radio Telescopes and the Emergence of the SKA, 1957–1993

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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4. Concluding Remarks

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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5. Site Selection Story, 2006–2012: Decision

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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6. Innovation Meets Reality: The SKA Design

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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7. Evolution of the SKA Science Case

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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8. Introduction

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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9. Transition to a Science Mega-Project, 2006–2012

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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10. Global Collaboration on Science and Technology, 1993–2006

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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11. Industry Engagement

Author

Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., Crosby, Philip, Orchiston, Wayne, Series Editor, Rothenberg, Marc, Series Editor, Cunningham, Clifford, Series Editor, Bell, Trudy, Editorial Board Member, Devorkin, David, Editorial Board Member, Evans, James, Editorial Board Member, Goss, Miller, Editorial Board Member, Hamacher, Duane, Editorial Board Member, Lequeux, James, Editorial Board Member, Mitton, Simon, Editorial Board Member, Ruggles, Clive, Editorial Board Member, Trimble, Virginia, Editorial Board Member, Wolfschmidt, Gudrun, Editorial Board Member, Schilizzi, Richard T., Ekers, Ronald D., Dewdney, Peter E., and Crosby, Philip

Published
2024
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12. The GHz-Peaked Spectrum radio galaxy 2021+614: Detection of slow motion in a compact symmetric object

Author

Tschager, Wolfgang, Schilizzi, Richard T., R"ottgering, Huub J. A., Snellen, Ignas A. G., and Miley, George K.

Subjects
Astrophysics
Abstract

We have analysed VSOP (VLBI Space Observatory Programme) data at 5 GHz and ground-based VLBI (Very Long Baseline Interferometry) data at 15 GHz for the GHz-Peaked Spectrum (GPS) radio galaxy 2021+614. Its morphology is consistent with it being a compact symmetric source extending over 30 h^-1 pc (H_0 = 100 h km s^-1 Mpc^-1, q_0 = 0.5). From a comparison with earlier observations we have detected an increase in the separation and a decrease in the size of the two most prominent components. We determine the projected speed with which these two components recede from each other to be 0.12+/-0.02 h^-1 c. Given the projected separation of the two components of 16.1 h^-1 pc, the infered kinematic age is 440+/-80 years, measured in the source reference frame. These results provide additional support for the contention that compact symmetric radio objects are young and the precursors of the classical FR I or FR II radio sources. The sizes of individual components appear to contract with time which is not consistent with the self-similar evolution model for peaked spectrum sources. In order to overcome problems related to the estimation of uncertainties for separation measurements between source components, we have developed and applied a method that compares two uv-data sets obtained at different epochs. This method parametrizes the most important structural change, the increase in separation between components, by rescaling the u and v axis of the amplitude interference pattern. It provides best-fit values for the parameters and uses a bootstrap method to estimate the errors in the parameters., Comment: 10 pages, 5 figures, A&A accepted

Published
2000

14. Constraining the radio jet proper motion of the high-redshift quasar J2134−0419 at z = 4.3

Author

Perger, Krisztina, primary, Frey, Sándor, additional, Gabányi, Krisztina É, additional, An, Tao, additional, Britzen, Silke, additional, Cao, Hong-Min, additional, Cseh, Dávid, additional, Dennett-Thorpe, Jane, additional, Gurvits, Leonid I, additional, Hong, Xiao-Yu, additional, Hook, Isobel M, additional, Paragi, Zsolt, additional, Schilizzi, Richard T, additional, Yang, Jun, additional, and Zhang, Yingkang, additional

Published
2018
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16. Constraining the radio jet proper motion of the high-redshift quasar J2134-0419 at z = 4.3.

Author

Perger, Krisztina, Frey, Sándor, Gabányi, Krisztina É., Tao An, Britzen, Silke, Hong-Min Cao, Cseh, Dávid, Dennett-Thorpe, Jane, Gurvits, Leonid I., Xiao-Yu Hong, Hook, Isobel M., Paragi, Zsolt, Schilizzi, Richard T., Jun Yang, and Yingkang Zhang

Subjects
RADIO jets (Astrophysics), PROPER motion of stars, QUASARS, GALACTIC redshift, ASTRONOMICAL models, VERY long baseline interferometry
Abstract

To date, PMN J2134-0419 (at a redshift z = 4.33) is the second most distant quasar known with a milliarcsecond-scale morphology permitting direct estimates of the jet proper motion. Based on two-epoch observations, we constrained its radio jet proper motion using the very long baseline interferometry (VLBI) technique. The observations were conducted with the European VLBI Network (EVN) at 5 GHz on 1999 November 26 and 2015 October 6. We imaged the central 10-pc scale radio jet emission and modelled its brightness distribution. By identifying a jet component at both epochs separated by 15.86 yr, a proper motion of μ = 0.035 ± 0.023 mas yr-1 is found. It corresponds to an apparent superluminal speed of βa = 4.1 ± 2.7 c. Relativistic beaming at both epochs suggests that the jet viewing angle with respect to the line of sight is smaller than 20°, with a minimum bulk Lorentz factor Γ = 4.3. The small value of the proper motion is in good agreement with the expectations from the cosmological interpretation of the redshift and the current cosmological model. Additionally we analysed archival Very Large Array observations of J2143-0419 and found indication of a bent jet extending to ∼30 kpc. [ABSTRACT FROM AUTHOR]

Published
2018
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22. A very brief description of LOFAR – the Low Frequency Array

Author

Falcke, Heino D., primary, van Haarlem, Michiel P., additional, de Bruyn, A. Ger, additional, Braun, Robert, additional, Röttgering, Huub J.A., additional, Stappers, Benjamin, additional, Boland, Wilfried H.W.M., additional, Butcher, Harvey R., additional, de Geus, Eugène J., additional, Koopmans, Leon V., additional, Fender, Robert P., additional, Kuijpers, H. Jan M.E., additional, Miley, George K., additional, Schilizzi, Richard T., additional, Vogt, Corina, additional, Wijers, Ralph A.M.J., additional, Wise, Michael W., additional, Brouw, Willem N., additional, Hamaker, Johan P., additional, Noordam, Jan E., additional, Oosterloo, Thomas, additional, Bähren, Lars, additional, Brentjens, Michiel A., additional, Wijnholds, Stefan J., additional, Bregman, Jaap D., additional, van Cappellen, Wim A., additional, Gunst, André W., additional, Kant, G.W. (Dion), additional, Reitsma, Jan, additional, van der Schaaf, Kjeld, additional, and de Vos, Cornelis M., additional

Published
2006
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24. The VLBI Space Observatory Programme and the Radio-Astronomical Satellite HALCA

Author

Hirabayashi, Hisashi, primary, Hirosawa, Haruto, additional, Kobayashi, Hideyuki, additional, Murata, Yasuhiro, additional, Asaki, Yoshiharu, additional, Avruch, Ian M., additional, Edwards, Philip G., additional, Fomalont, Edward B., additional, Ichikawa, Tsutomu, additional, Kii, Tsuneo, additional, Okayasu, Rikako, additional, Wajima, Kiyoaki, additional, Inoue, Makoto, additional, Kawaguchi, Noriyuki, additional, Chikada, Yoshihiro, additional, Bushimata, Takeshi, additional, Fujisawa, Kenta, additional, Horiuchi, Shinji, additional, Kameno, Seiji, additional, Miyaji, Takeshi, additional, Shibata, Kazunori M., additional, Shen, Zhi-Qiang, additional, Umemoto, Tomofumi, additional, Kasuga, Takashi, additional, Nakajima, Jun'ichi, additional, Takahashi, Yukio, additional, Enome, Shinzou, additional, Morimoto, Masaki, additional, Ellis, Jordan, additional, Meier, David L., additional, Murphy, David W., additional, Preston, Robert A., additional, Smith, Joel G., additional, Wietfeldt, Rick D., additional, Benson, John M., additional, Claussen, Mark J., additional, Flatters, Chris, additional, Moellenbrock, George A., additional, Romney, Jonathan D., additional, Ulvestad, James S., additional, Langston, Glen I., additional, Minter, Anthony H., additional, D'Addario, Larry R., additional, Dewdney, Peter E., additional, Dougherty, Sean M., additional, Jauncey, David L., additional, Lovell, James E. J., additional, Tingay, Steven J., additional, Tzioumis, Anastasios K., additional, Taylor, A. Russell, additional, Cannon, Wayne H., additional, Gurvits, Leonid I., additional, Schilizzi, Richard T., additional, Booth, Roy S., additional, and Popov, Misha V., additional

Published
2000
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25. The VSOP 5 GHz AGN Survey I. Compilation and Observations

Author

Hirabayashi, Hisashi, primary, Fomalont, Edward B., additional, Horiuchi, Shinji, additional, Lovell, James E. J., additional, Moellenbrock, George A., additional, Inoue, Makoto, additional, Burke, Bernard F., additional, Dewdney, Peter E., additional, Gurvits, Leonid I., additional, Kobayashi, Hideyuki, additional, Jauncey, David L., additional, Murata, Yasuhiro, additional, McCulloch, Peter, additional, Preston, Robert A., additional, Avruch, Ian M., additional, Edwards, Philip G., additional, Dougherty, Sean M., additional, Scott, William K., additional, Frey, Sandor, additional, Paragi, Zsolt, additional, Kovalev, Yuri A., additional, Popov, Misha, additional, Romney, Jonathan D., additional, Schilizzi, Richard T., additional, Shen, Zhi-Qiang, additional, Nicolson, George, additional, Quick, Jonathan, additional, Costa, Marco, additional, Dodson, Richard, additional, Reynolds, John E., additional, Tzioumis, Anastasios K., additional, Tingay, Steven J., additional, Hong, Xiao-Yu, additional, Liang, Shi-Guang, additional, Huang, Xin-Yong, additional, Wei, Wen-Ren, additional, Trigilio, Corrado, additional, Tuccari, Gino, additional, Nakajima, Jun'ichi, additional, Kawai, Eiji, additional, Umemoto, Tomofumi, additional, Miyaji, Takeshi, additional, Fujisawa, Kenta, additional, Kawaguchi, Noriyuki, additional, Kus, Andrzej, additional, Ghigo, Frank, additional, Salter, Chris, additional, Ghosh, Tapasi, additional, Kanevsky, Boris, additional, Slysh, Vyacheslav, additional, Gunn, Alastair, additional, Burgess, Paul, additional, Carlson, Brent, additional, Del Rizzo, David, additional, Taylor, Russell, additional, Cannon, Wayne, additional, Kameno, Seiji, additional, Shibata, Kazunori M., additional, Benson, John, additional, Flatters, Chris, additional, Hale, Andrew, additional, Lewis, Craig, additional, Langston, Glen, additional, Minter, Anthony, additional, Miller, Kevin, additional, Smith, Joel, additional, Wietfeldt, Richard, additional, Altunin, Valery, additional, Meier, David L., additional, Murphy, David W., additional, Resch, George, additional, Lister, Matthew L., additional, Piner, B. Glenn, additional, Jenkins, Robert, additional, Border, James, additional, and Gimeno, Jesus, additional

Published
2000
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29. The Square Kilometre Array.

Author

DEWDNEY, PETER E., HALL, PETER J., SCHILIZZI, RICHARD T., and LAZIO, T. JOSEPH L. W.

Subjects
RADIO telescopes, COSMOGONY, DIGITAL signal processing, SURVEYS, ANTENNA arrays, ASTROPHYSICS, METAPHYSICAL cosmology, ASTRONOMY
Abstract

The Square Kilometre Array (SKA) will be an ultrasensitive radio telescope, built to further the understanding of the most important phenomena in the Universe, including some pertaining to the birth and eventual death of the Universe itself. Over the next few years, the SKA will make the transition from an early formative to a well-defined design. This paper outlines how the scientific challenges are translated into technical challenges, how the application of recent technology offers the potential of affordably meeting these challenges, and how the choices of technology will ultimately be made. The SKA will be an array of coherently connected antennas spread over an area about 3000 km in extent, with an aggregate antenna collecting area of up to 106 m² at centimeter and meter wavelengths. A key scientific requirement is the ability to carry out sensitive observations of the sky over large areas (surveys). The "survey speed" of the SKA will be enabled by the application of the most up-to-date signal-processing technology available. The SKA science impact will be widely felt in astroparticle physics and cosmology, fundamental physics, galactic and extragalactic astronomy, solar system science, and astrobiology. [ABSTRACT FROM AUTHOR]

Published
2009
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30. The 18CM Visibility Functions of High Frequency Compact Sources, (11)

Author

OWENS VALLEY RADIO OBSERVATORY PASADENA CALIF, Shaffer,David B., Schilizzi,Richard T., OWENS VALLEY RADIO OBSERVATORY PASADENA CALIF, Shaffer,David B., and Schilizzi,Richard T.

Abstract

Observations at 18 cm, with an angular resolution of approximately 0.01 sec., of the strongest compact radio sources with milliarcsecond structure at shorter wavelengths (6-2 cm) show that most of the sources are only slightly resolved, and most of the 18 cm radiation comes from quite small components, probably the same components seen at the short wavelengths. Some sources have brightness temperatures > 10 to the 12th power K. Weak emissions were detected from the nucleus of Centaurus A. The May, 1974 radio outburst of Cyg X-3 appears to have had an expansion velocity of about 0.2 c., Sponsored in part by Grant NSF-GP-19400.

Published
1975

33. DIVISION X / COMMISSION 40 / WORKING GROUP GLOBAL VERY LONG BASELINE INTERFEROMETRY.

Author

Romney, Jonathan D., Schilizzi, Richard T., Garrington, Simon T., Gurvits, Leonid I., Hong, Xiaoyu, Jauncey, David L., Kobayashi, Hideyuki, Porcas, Richard, Preston, Robert A., Salter, Christopher John, Szomoru, Arpad, Tsuboi, Masato, Ulvestad, James S., and Whitney, Alan R.

Abstract

This triennium began with an action to re-create the Terms of Reference for the Working Group Global VLBI (WG-GV). These had been lost over the years since the Group was established in 1990. Fortunately, the personal archive of one long-term member yielded a copy of the original memorandum by R. D. Ekers, which was found to coincide quite well with current practice and areas of interest. New Terms of Reference, based on modern conditions, were drafted and accepted by both IAU and URSI. [ABSTRACT FROM PUBLISHER]

Published
2008
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