Prof. Roy Maartens
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| Position: | SKA / SARChI Professor in Atronomy & Astrophysics |
| Department: | Physics |
| Faculty: | Faculty of Natural Sciences |
| Qualifications: | PhD (Cape Town) |
| My publications in this repository | |
| Publications since 1995 | |
| More about me: | here , and here |
| Find out more about: | UWC Astrophysics |
| Tel: | 021 959 3693 |
| Fax: | 021 959 3474 |
| Email: | rmaartens@uwc.ac.za |
Recent Submissions
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The wide-field, multiplexed, spectroscopic facility weave: Survey design, overview, and simulated implementation
(Oxford University Press, 2024)WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, saw first light in late 2022. WEAVE comprises a new 2-deg field-of-view prime-focus corrector system, a ... -
Association between Physical Fitness and Cardiovascular
(MDPI, 2023)Firefighters perform strenuous work in dangerous and unpredictable environments requiring optimal physical conditioning. The aim of this study was to investigate the association between physical fitness and cardiovascular ... -
Physical and magnetic properties of biosynthesized ZnO/Fe2O3, ZnO/ZnFe2O4, and ZnFe2O4 nanoparticles
(Elsevier B.V., 2023)For the first time, the physical and magnetic properties of biosynthesized ZnO/Fe2O3, ZnO/ZnFe2O4, and ZnFe2O4 nanoparticles (NPs) from aqueous extract of rosemary leaves extract are reported. The findings demonstrated the ... -
Feature Reduction for the Classification of Bruise Damage to Apple Fruit Using a Contactless FT-NIR Spectroscopy with Machine Learning
(MDPI, 2023)Spectroscopy data are useful for modelling biological systems such as predicting quality parameters of horticultural products. However, using the wide spectrum of wavelengths is not practical in a production setting. Such ... -
Trust is personal and professional: The role of trust in the rise and fall of a South African civil society coalition
(SAGE Publications Ltd, 2023)This article explores trust dynamics among a coalition of civil society organizations called Unite Behind that formed in Cape Town, South Africa, in late 2017. Unite Behind was established to demand more accountability ... -
A wide-angle formulation of foreground filters for HI intensity mapping
(Institute of Physics, 2024)Neutral hydrogen intensity mapping can in principle deliver rapid and large-volume cosmological surveys with exquisitely accurate redshifts that are determined directly from imaging. However, intensity maps suffer from ... -
A wide-angle formulation of foreground filters for HI intensity mapping
(Springer Nature, 2024)The fluctuations generated by Inflation are nearly Gaussian in the simplest models, but may be non-Gaussian in more complex models, potentially leading to signatures in the late Universe. In particular, local-type primordial ... -
Nonlinear modulation of the HI power spectrum on ultra-large scales. I
(IOP Science, 2015)Intensity mapping of the neutral hydrogen brightness temperature promises to provide a three-dimensional view of the universe on very large scales. Nonlinear effects are typically thought to alter only the small-scale ... -
Hunting down horizon-scale effects with multi-wavelength surveys
(American Astronomical Society, 2015)Next-generation cosmological surveys will probe ever larger volumes of the universe, including the largest scales, near and beyond the horizon. On these scales, the galaxy power spectrum carries signatures of local primordial ... -
Probing the imprint of interacting dark energy on very large scales
(American Physical Society, 2015)The observed galaxy power spectrum acquires relativistic corrections from light-cone effects, and these corrections grow on very large scales. Future galaxy surveys in optical, infrared and radio bands will probe increasingly ... -
Model-independent constraints on dark energy and modified gravity with the SKA
(Proceedings of Science, 2014)Employing a nonparametric approach of the principal component analysis (PCA), we forecast the future constraint on the equation of state w(z) of dark energy, and on the effective Newton constant m(k; z), which parameterise ... -
Testing foundations of modern cosmology with SKA all-sky surveys
(Proceedings of Science, 2014)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 ... -
Measuring redshift-space distortion with future SKA surveys
(Proceedings of Science, 2014)The peculiar motion of galaxies can be a particularly sensitive probe of gravitational collapse. As such, it can be used to measure the dynamics of dark matter and dark energy as well the nature of the gravitational laws ... -
Cosmology on the largest scales with the SKA
(Proceedings of Science, 2014)The study of the Universe on ultra-large scales is one of the major science cases for the Square Kilometre Array (SKA). The SKA will be able to probe a vast volume of the cosmos, thus representing a unique instrument, ... -
Cosmology with a SKA HI intensity mapping survey
(Proceedings of Science, 2014)HI intensity mapping (IM) is a novel technique capable of mapping the large-scale structure of the Universe in three dimensions and delivering exquisite constraints on cosmology, by using HI as a biased tracer of the ... -
Cosmology from HI galaxy surveys with the SKA
(Proceedings of Science, 2014)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 ... -
Overview of Cosmology with the SKA
(Proceedings of Science, 2014)The new frontier of cosmology will be led by three-dimensional surveys of the large-scale structure of the Universe. Based on its all-sky surveys and redshift depth, the SKA is destined to revolutionize cosmology, in ...
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