Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Bester, Hertzog L."'
Autor:
Roth, Jakob, Frank, Philipp, Bester, Hertzog L., Smirnov, Oleg M., Westermann, Rüdiger, Enßlin, Torsten A.
Context: Interferometric imaging is algorithmically and computationally challenging as there is no unique inversion from the measurement data back to the sky maps, and the datasets can be very large. Many imaging methods already exist, but most of th
Externí odkaz:
http://arxiv.org/abs/2406.09144
Autor:
Sejake, Precious K., White, Sarah V., Heywood, Ian, Thorat, Kshitij, Bester, Hertzog L., Makhathini, Sphesihle, Fanaroff, Bernie
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 518, 2023, Issue 3, pp.4290-4309
We present the results from studying 140 radio sources in the GLEAM (GaLactic and Extragalactic All-sky MWA [Murchison Widefield Array]) 4-Jy (G4Jy) Sample. These sources were followed-up with MeerKAT to assess their radio morphology and enable host-
Externí odkaz:
http://arxiv.org/abs/2211.12242
The celebrated CLEAN algorithm has been the cornerstone of deconvolution algorithms in radio interferometry almost since its conception in the 1970s. For all its faults, CLEAN is remarkably fast, robust to calibration artefacts and in its ability to
Externí odkaz:
http://arxiv.org/abs/2101.08072
Autor:
Arras, Philipp, Bester, Hertzog L., Perley, Richard A., Leike, Reimar, Smirnov, Oleg, Westermann, Rüdiger, Enßlin, Torsten A.
Publikováno v:
A&A 646, A84 (2021)
CLEAN, the commonly employed imaging algorithm in radio interferometry, suffers from a number of shortcomings: in its basic version it does not have the concept of diffuse flux, and the common practice of convolving the CLEAN components with the CLEA
Externí odkaz:
http://arxiv.org/abs/2008.11435
We use a direct observational approach to investigate the possibility of testing the Copernican principle with data from upcoming radio surveys. In particular we illustrate the importance of measuring derivatives transverse to the past light-cone whe
Externí odkaz:
http://arxiv.org/abs/1705.00994
We give an outline of an algorithm designed to reconstruct the background cosmological metric within the class of spherically symmetric dust universes that may include a cosmological constant. Luminosity and age data are used to derive constraints on
Externí odkaz:
http://arxiv.org/abs/1601.07362
Publikováno v:
Monthly Notices of the Royal Astronomical Society 2015 453 (3): 2364-2377
We present a new algorithm that can reconstruct the full distributions of metric components within the class of spherically symmetric dust universes that may include a cosmological constant. The algorithm is capable of confronting this class of solut
Externí odkaz:
http://arxiv.org/abs/1506.01591
Publikováno v:
JCAP02(2014)009
We investigate the possibility of using Gaussian process regression to smooth data on the current past null-cone for use as the input to a relativistic integration scheme. The algorithm we present is designed to reconstruct the metric of spacetime wi
Externí odkaz:
http://arxiv.org/abs/1312.1081
Publikováno v:
ASP Conference Series; 2024, Vol. 535, p343-346, 4p
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