Hydrogen Epoch of Reionization Array (HERA)
| Autor: | Paul Alexander, Lourence Malan, David MacMahon, Daniel C. Jacobs, Jon Ringuette, C. H. Smith, Angelo Syce, Cresshim Malgas, Aaron R. Parsons, Nicolas Fagnoni, Joshua S. Dillon, Miguel F. Morales, Nithyanandan Thyagarajan, Richard F. Bradley, Peter Williams, Zaki S. Ali, Telalo Lekalake, Aaron Ewall-Wice, Nipanjana Patra, Eloy de Lera Acedo, Jonathan C. Pober, Nathan Mathison, Andrei Mesinger, Nima Razavi-Ghods, Gianni Bernardi, Bradley Greig, Steve R. Furlanetto, Jasper Grobbelaar, David DeBoer, Adrian Liu, Matthys Maree, Saul A. Kohn, Zachary E. Martinot, Anita Loots, Brian Glendenning, Carina Cheng, Judd D. Bowman, Raddwine Sell, Kathryn Rosie, Samantha Pieterse, Adam P. Beardsley, Gcobisa Fadana, Bryna J. Hazelton, Jacqueline N. Hewitt, Haoxuan Zheng, James E. Aguirre, James Robnett, Abraham R. Neben, Randall Fritz, Austin Julius, Chris L. Carilli, Jack Hickish, Eunice Matsetela, MacCalvin Kariseb, Max Tegmark |
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| Přispěvatelé: | ITA, USA, Deboer, David R., Parsons, Aaron R., Aguirre, James E., Alexander, Paul, Ali, Zaki S., Beardsley, Adam P., Bernardi, Gianni, Bowman, Judd D., Bradley, Richard F., Carilli, Chris L., Cheng, Carina, Acedo, Eloy de Lera, Dillon, Joshua S., Ewall-Wice, Aaron, Fadana, Gcobisa, Fagnoni, Nicola, Fritz, Randall, Furlanetto, Steve R., Glendenning, Brian, Greig, Bradley, Grobbelaar, Jasper, Hazelton, Bryna J., Hewitt, Jacqueline N., Hickish, Jack, Jacobs, Daniel C., Julius, Austin, Kariseb, Maccalvin, Kohn, Saul A., Lekalake, Telalo, Liu, Adrian, Loots, Anita, Macmahon, David, Malan, Lourence, Malgas, Cresshim, Maree, Matthy, Martinot, Zachary, Mathison, Nathan, Matsetela, Eunice, Mesinger, Andrei, Morales, Miguel F., Neben, Abraham R., Patra, Nipanjana, Pieterse, Samantha, Pober, Jonathan C., Razavi-Ghods, Nima, Ringuette, Jon, Robnett, Jame, Rosie, Kathryn, Sell, Raddwine, Smith, Craig, Syce, Angelo, Tegmark, Max, Thyagarajan, Nithyanandan, Williams, Peter K. G., Zheng, Haoxuan |
| Rok vydání: | 2016 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Bryna Dark age FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics 7. Clean energy 01 natural sciences Reionization Settore FIS/05 - Astronomia e Astrofisica First star 0103 physical sciences Physical Sciences and Mathematics Theology Telescope 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) Astrophysics::Galaxy Astrophysics biology 010308 nuclear & particles physics Philosophy Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics HERA biology.organism_classification Space and Planetary Science Interferometer [Instrumentation] Interferometric [Techniques] Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | DeBoer, David R; Parsons, Aaron R; Aguirre, James E; Alexander, Paul; Ali, Zaki S; Beardsley, Adam P; et al.(2017). Hydrogen Epoch of Reionization Array (HERA). Publications of the Astronomical Society of the Pacific, 129(974), 045001. doi: 10.1088/1538-3873/129/974/045001. UC Office of the President: Multicampus Research Programs and Initiatives (MRPI); a funding opportunity through UC Research Initiatives (UCRI). Retrieved from: http://www.escholarship.org/uc/item/4fc1r2np NASA Astrophysics Data System |
| DOI: | 10.48550/arxiv.1606.07473 |
| Popis: | The Hydrogen Epoch of Reionization Array (HERA) is a staged experiment to measure 21 cm emission from the primordial intergalactic medium (IGM) throughout cosmic reionization ($z=6-12$), and to explore earlier epochs of our Cosmic Dawn ($z\sim30$). During these epochs, early stars and black holes heated and ionized the IGM, introducing fluctuations in 21 cm emission. HERA is designed to characterize the evolution of the 21 cm power spectrum to constrain the timing and morphology of reionization, the properties of the first galaxies, the evolution of large-scale structure, and the early sources of heating. The full HERA instrument will be a 350-element interferometer in South Africa consisting of 14-m parabolic dishes observing from 50 to 250 MHz. Currently, 19 dishes have been deployed on site and the next 18 are under construction. HERA has been designated as an SKA Precursor instrument. In this paper, we summarize HERA's scientific context and provide forecasts for its key science results. After reviewing the current state of the art in foreground mitigation, we use the delay-spectrum technique to motivate high-level performance requirements for the HERA instrument. Next, we present the HERA instrument design, along with the subsystem specifications that ensure that HERA meets its performance requirements. Finally, we summarize the schedule and status of the project. We conclude by suggesting that, given the realities of foreground contamination, current-generation 21 cm instruments are approaching their sensitivity limits. HERA is designed to bring both the sensitivity and the precision to deliver its primary science on the basis of proven foreground filtering techniques, while developing new subtraction techniques to unlock new capabilities. The result will be a major step toward realizing the widely recognized scientific potential of 21 cm cosmology. Comment: 26 pages, 24 figures, 2 tables |
| Databáze: | OpenAIRE |
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