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26 April 2024 |
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Cosmic Web Research with KAT-7, MeerKAT & FAST | | Claude Carignan
; | | Date: |
12 Oct 2015 | | Abstract: | The seven-dish KAT-7 array was built as an engineering test-bed for the
64-dish Karoo Array Telescope, known as MeerKAT, which is the South African
precursor of the Square Kilometre Array (SKA). KAT-7 and MeerKAT are located
close to the South African SKA core site in the Northern Cape’s Karoo desert
region. Construction of the KAT-7 array was completed in December 2010. The
short baselines (26 to 185 m) and low system temperature (T$_{
m sys} sim$ 26
K) of the telescope make it very sensitive to large-scale,
low-surface-brightness emission, which is one of the HI science driver for
MeerKAT and one of the future strength of FAST. While the main purpose of KAT-7
was to test technical solutions for MeerKAT and the SKA, scientific targets
were also observed during commissioning to test the HI line mode and the first
results obtained are presented. A description of MeerKAT and an update on its
construction is also given. Early science should start in mid-2016 with a
partial array and the full array should be completed at the end of 2017. For
cosmic-web research (detection of low column density HI), a future combination
of data from FAST and MeerKAT should allow to explore the unknown territory of
$< 10^{18}$ cm$^{-2}$ surface densities and the possible connection between
spiral galaxies and the surrounding cosmic web. | | Source: | arXiv, 1510.3462 | | Services: | Forum | Review | PDF | Favorites | |
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