1 / 13

Prof. Steven Tingay (ICRAR, Curtin University) Workshop on East-Asian Collaboration on the SKA

A long baseline SKA that connects Asia and Oceania:. Prof. Steven Tingay (ICRAR, Curtin University) Workshop on East-Asian Collaboration on the SKA Daejeon, Korea, November 30 – December 2, 2011. Reprise of presentation from:

halle
Download Presentation

Prof. Steven Tingay (ICRAR, Curtin University) Workshop on East-Asian Collaboration on the SKA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A long baseline SKA that connects Asia and Oceania: Prof. Steven Tingay (ICRAR, Curtin University) Workshop on East-Asian Collaboration on the SKA Daejeon, Korea, November 30 – December 2, 2011

  2. Reprise of presentation from: Advances in Asia and Oceania Toward Very Long Baseline Interferometry in the Age of the Square Kilometre Array Perth, Australia: May 4 – 6, 2011

  3. SKA context • SKA project enters “pre-construction” phase in 2012. Some partners on board, some yet to come on board. • Exact scope and design to be defined over next three to four years. Open questions in science case and technical requirements. • High angular resolution science for the SKA has great potential beyond the nominal 3000 km baseline (Memo #135); • What are the opportunities to extend SKA beyond 3000 km? • Science case? • Telescope locations? Existing telescopes? • Network connectivity?

  4. Pulsars – key driver for SKA Phase 1; • Galactic magnetic fields; • Proto-planetary disks at cm • wavelengths; • Resolving AGN and star formation • in galaxies; • The first generation of AGN jets; • X-ray binary systems; • Mapping high mass star formation; • ……….. Science case for long baselines Godfrey et al. 2011, PASA, in press arXiv:1111.6398

  5. Parallax distances to pulsars: • Pulsar binary systems. Tests of • GR limited by availability of independent measurements of distance (Deller, Bailes & Tingay, 2009, Science, 323, 1327); • SKA Phase 1 pulsar timing will need SKA sensitivity long baseline astrometry. • Mapping the ionised galactic medium • and galactic magnetic fields from pulsar DM measurements and distance measurements; • And many other aspects of pulsar science…. Pulsars are the stand-out sciencefor SKA long baselines ~3000 km baseline ~9000 km baseline Increases number of pulsar parallaxes with better than 20% error by ~4500 (50%) Smits, Tingay, Wex, Kramer & Stappers, 2011, A&A, 528, 108

  6. Geographic advantage and Maximum Discovery An SKA built in Australia and New Zealand (Oceania) couples two significant geographic advantages: • A Southern Hemisphere radio quiet site that can support a full range of baseline lengths from 0 km to 5500 km; • Proximity to the fastest growing region in the world in terms of radio astronomy capability, encompasing China, Japan, India, Korea (Asia). Connecting Oceania and Asia could very effectively extending SKA baselines to ~9000 km.

  7. The Asian capacity Existing and planned/proposed Chinese, Indian, Japanese and Korean facilities total over 100,000 m2, comparable to the total collecting area for the SKA remote stations. Perth Indian, Chinese, Japanese and Korean radio telescopes >20 m in diameter. Australian Institute of Aboriginal and Torres Strait Islander Studies

  8. δ= -30 δ=0 Australia and New Zealand SKA Take six SKA stations from Australia and place them in Asia? + China (3) + Japan/Korea (2) ν=1.4 GHz; Δν=350 MHz. ~25% fractional bandwidth + India (1) (u,v) coverages by Dr Leith Godfrey.

  9. Networks and data transport 10 Gbps intercontinental networking is required, and is on the way

  10. Australia’s $43b National Broadband Network

  11. e-VLBI as an SKA trail-blazar KVN – EVN, Oct 2011 First ever VLBI using the GMRT, 2011 Australia – India. June 2008. China, Japan, Australia. ~1 Gbps ASKAP first e-VLBI – June 2011

  12. Questions/challenges • What science would an extended Asia-Oceania SKA excel at? • How many telescopes would be needed, how large and with what geographic distribution? • Existing telescopes or SKA stations? • What coordination in international networking is required?

  13. Summary • SKA Phase 1 science driver for pulsars calls for long baseline astrometry – the longer the baselines the better; • An Oceania (Australia – New Zealand) SKA naturally connects to Asia (China, Japan, Korea, and India). These countries can derive direct benefits from involvement in the SKA project. • Requires an extension of the e-VLBI technique to 10 Gbps and beyond, which looks feasible in the near future – SKA may help drive international research connectivity.

More Related