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This chapter provides an overview of the possibilities for transient and variable-source astrophysics with the Square Kilometre Array. While subsequent chapters focus on the astrophysics of individual events, we focus on the broader…

High Energy Astrophysical Phenomena · Physics 2015-07-06 Rob Fender , Adam Stewart , Jean-Pierre Macquart , Immacolata Donnarumma , Tara Murphy , Adam Deller , Zsolt Paragi , Shami Chatterjee

Low-frequency radio observations of neutral hydrogen during and before the epoch of cosmic reionization will provide hundreds of quasi-independent source planes, each of precisely known redshift, if a resolution of ~ 1 arcminutes or better…

Astrophysics · Physics 2010-11-11 R. Benton Metcalf

The Square Kilometer Array (SKA) has the potential to produce galaxy redshift surveys which will be competitive with other state of the art cosmological experiments in the next decade. In this chapter we summarise what capabilities the…

A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions of tens of milliarcseconds, which at submillimeter (submm) wavelengths requires baselines up to ~15 km. To develop and test…

Instrumentation and Methods for Astrophysics · Physics 2016-09-30 ALMA Partnership , E. B. Fomalont , C. Vlahakis , S. Corder , A. Remijan , D. Barkats , R. Lucas , T. R. Hunter , C. L. Brogan , Y. Asaki , S. Matsushita , W. R. F. Dent , R. E. Hills , N. Phillips , A. M. S. Richards , P. Cox , R. Amestica , D. Broguiere , W. Cotton , A. S. Hales , R. Hiriart , A. Hirota , J. A. Hodge , C. M. V. Impellizzeri , J. Kern , R. Kneissl , E. Liuzzo , N. Marcelino , R. Marson , A. Mignano , K. Nakanishi , B. Nikolic , J. E. Perez , L. M. Pérez , I. Toledo , R. Aladro , B. Butler , J. Cortes , P. Cortes , V. Dhawan , J. Di Francesco , D. Espada , F. Galarza , D. Garcia-Appadoo , L. Guzman-Ramirez , E. M. Humphreys , T. Jung , S. Kameno , R. A. Laing , S. Leon , J. Mangum , G. Marconi , H. Nagai , L. -A. Nyman , M. Radiszcz , J. A. Rodón , T. Sawada , S. Takahashi , R. P. J. Tilanus , T. van Kempen , B. Vila Vilaro , L. C. Watson , T. Wiklind , F. Gueth , K. Tatematsu , A. Wootten , A. Castro-Carrizo , E. Chapillon , G. Dumas , I. de Gregorio-Monsalvo , H. Francke , J. Gallardo , J. Garcia , S. Gonzalez , J. E. Hibbard , T. Hill , T. Kaminski , A. Karim , M. Krips , Y. Kurono , C. Lopez , S. Martin , L. Maud , F. Morales , V. Pietu , K. Plarre , G. Schieven , L. Testi , L. Videla , E. Villard , N. Whyborn , M. A. Zwaan , F. Alves , P. Andreani , A. Avison , M. Barta , F. Bedosti , G. J. Bendo , F. Bertoldi , M. Bethermin , A. Biggs , J. Boissier , J. Brand , S. Burkutean , V. Casasola , J. Conway , L. Cortese , B. Dabrowski , T. A. Davis , M. Diaz Trigo , F. Fontani , R. Franco-Hernandez , G. Fuller , R. Galvan Madrid , A. Giannetti , A. Ginsburg , S. F. Graves , E. Hatziminaoglou , M. Hogerheijde , P. Jachym , I. Jimenez Serra , M. Karlicky , P. Klaasen , M. Kraus , D. Kunneriath , C. Lagos , S. Longmore , S. Leurini , M. Maercker , B. Magnelli , I. Marti Vidal , M. Massardi , A. Maury , S. Muehle , S. Muller , T. Muxlow , E. O'Gorman , R. Paladino , D. Petry , J. Pineda , S. Randall , J. S. Richer , A. Rossetti , A. Rushton , K. Rygl , A. Sanchez Monge , R. Schaaf , P. Schilke , T. Stanke , M. Schmalzl , F. Stoehr , S. Urban , E. van Kampen , W. Vlemmings , K. Wang , W. Wild , Y. Yang , S. Iguchi , T. Hasegawa , M. Saito , J. Inatani , N. Mizuno , S. Asayama , G. Kosugi , K. -I. Morita , K. Chiba , S. Kawashima , S. K. Okumura , N. Ohashi , R. Ogasawara , S. Sakamoto , T. Noguchi , Y. -D. Huang , S. -Y. Liu , F. Kemper , P. M. Koch , M. -T. Chen , Y. Chikada , M. Hiramatsu , D. Iono , M. Shimojo , S. Komugi , J. Kim , A. -R. Lyo , E. Muller , C. Herrera , R. E. Miura , J. Ueda , J. Chibueze , Y. -N. Su , A. Trejo-Cruz , K. -S. Wang , H. Kiuchi , N. Ukita , M. Sugimoto , R. Kawabe , M. Hayashi , S. Miyama , P. T. P. Ho , N. Kaifu , M. Ishiguro , A. J. Beasley , S. Bhatnagar , J. A. Braatz , D. G. Brisbin , N. Brunetti , C. Carilli , J. H. Crossley , L. D'Addario , J. L. Donovan Meyer , D. T. Emerson , A. S. Evans , P. Fisher , K. Golap , D. M. Griffith , A. E. Hale , D. Halstead , E. J. Hardy , M. C. Hatz , M. Holdaway , R. Indebetouw , P. R. Jewell , A. A. Kepley , D. -C. Kim , M. D. Lacy , A. K. Leroy , H. S. Liszt , C. J. Lonsdale , B. Matthews , M. McKinnon , B. S. Mason , G. Moellenbrock , A. Moullet , S. T. Myers , J. Ott , A. B. Peck , J. Pisano , S. J. E. Radford , W. T. Randolph , U. Rao Venkata , M. G. Rawlings , R. Rosen , S. L. Schnee , K. S. Scott , N. K. Sharp , K. Sheth , R. S. Simon , T. Tsutsumi , S. J. Wood

The Square Kilometre Array (SKA) will produce spectroscopic surveys of tens to hundreds of millions of HI galaxies, eventually covering 30,000 sq. deg. and reaching out to redshift z~2. The huge volumes probed by the SKA will allow for some…

Cosmology and Nongalactic Astrophysics · Physics 2017-08-25 Stefano Camera , Mario G. Santos , Roy Maartens

The concept of a Square Kilometre Array was developed to ensure that progress in Radio Astronomy in the early 21st Century continued at the same impressive pace as was achieved during the first 50 years. The SKA telescope is designed to…

Instrumentation and Methods for Astrophysics · Physics 2012-12-11 Lisa Harvey-Smith

The generation of a sky model for calibration of Square Kilometre Array observations requires a fast method of automatic point source detection and characterisation. In recent years, point source detection in two-dimensional images has been…

Instrumentation and Methods for Astrophysics · Physics 2016-11-02 Siamak Dehghan , Melanie Johnston-Hollitt , Christopher Hollitt

The lunar technique is a method for maximising the collection area for ultra-high-energy (UHE) cosmic ray and neutrino searches. The method uses either ground-based radio telescopes or lunar orbiters to search for Askaryan emission from…

We briefly consider some design aspects of aperture arrays for use in radio astronomy, particularly contrasting the performance of dense and sparse aperture arrays. Recent insights have emerged in the final design phase of LOFAR which…

Astrophysics · Physics 2007-05-23 Robert Braun , Wim van Cappellen

The Athena+ X-ray mirror will provide a collecting area of 2 m^2 at 1 keV and an angular resolution of 5 arc seconds Half Energy Width. The manufacture and performance of this mirror is of paramount importance to the success of the mission.…

Instrumentation and Methods for Astrophysics · Physics 2013-07-09 Richard Willingale , Giovanni Pareschi , Finn Christensen , Jan-Willem den Herder

The future new-generation radio telescope SKA (Square Kilometre Array) and its precursors will provide a rapidly growing number of polarized radio sources. Hundred and thousands polarized background sources can be measured towards nearby…

Astrophysics · Physics 2007-12-03 T. G. Arshakian , R. Stepanov , R. Beck , P. Frick , M. Krause

Deep imaging of structures from the Cosmic Dawn (CD) and the Epoch of Reionization (EoR) in five targeted fields is one of the highest priority scientific objectives for the Square Kilometre Array (SKA). Selecting 'quiet' fields, which…

Instrumentation and Methods for Astrophysics · Physics 2025-07-14 Xueying Zhang , Qian Zheng , Linhui Wu , Quan Guo , Stefan W. Duchesne , Mengfan He , Huanyuan Shan , Xiang-ping Wu , Melanie Johnston-Hollitt , Feiyu Zhao , Qingyuan Ma

The Square Kilometer Array (SKA) would be the world's largest radio telescope with eventually over a square kilometer of collecting area. However, there are enormous challenges in its data processing. The using of modern distributed…

Instrumentation and Methods for Astrophysics · Physics 2021-06-02 Shoulin Wei , Kaida Luo , Feng Wang , Hui Deng , Ying Mei

The Square Kilometre Array (SKA) will operate in frequency ranges often used by military radar and other communications technology. It has been shown that if Extraterrestrial Intelligences (ETIs) communicate using similar technology, then…

Earth and Planetary Astrophysics · Physics 2015-05-19 D. H. Forgan , R. C. Nichol

We give an overview of complementarity and synergy in cosmology between the Square Kilometre Array and future survey projects in other wavelengths. In the SKA era, precision cosmology will be limited by systematic errors and cosmic…

Continuum and HI surveys with the Square Kilometre Array (SKA) will allow us to probe some of the most fundamental assumptions of modern cosmology, including the Cosmological Principle. SKA all-sky surveys will map an enormous slice of…

The Square Kilometer Array will be operating at the same time with several new large optical, X-ray and Gamma-ray facilities currently under construction or planned. Fostering synergies in astrophysical research made across different…

Astrophysics · Physics 2015-06-24 Andrei P. Lobanov

The Square Kilometre Array (SKA) will offer an unprecedented view onto the early Universe, using interferometric observations of the redshifted 21cm line. The 21cm line probes the thermal and ionization state of the cosmic gas, which is…

Cosmology and Nongalactic Astrophysics · Physics 2019-08-14 Andrei Mesinger , Andrea Ferrara , Bradley Greig , Ilian Iliev , Garrelt Mellema , Jonathan Pritchard , Mario G. Santos

Detection of the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn and the Epoch of Reionization is one of the final frontiers of modern observational cosmology. The inherently faint signal makes it susceptible to…

Instrumentation and Methods for Astrophysics · Physics 2023-03-29 Aishrila Mazumder , Abhirup Datta , Mayuri Sathyanarayana Rao , Arnab Chakraborty , Saurabh Singh , Anshuman Tripathi , Madhurima Choudhury

The Square Kilometre Array will revolutionize pulsar studies with its wide field-of-view, wide-band observation and high sensitivity, increasing the number of observable pulsars by more than an order of magnitude. Pulsars are of interest…