SARAO and UWC are offering an exciting postdoctoral opportunity for a researcher interested ingaining experience in the science operations of the MeerKAT telescope. In this role, the successful candidates will support MeerKAT telescope operations, its users, and havethe opportunity to carry out their own research (up to 50 %). The SKA precursor MeerKAT is a …
The Centre for Radio Cosmology at the University of the Western Cape invites applications fora postdoctoral fellowship in areas of research relevant to its faculty members. These include:observational and theoretical Cosmology related to MeerKAT/SKAO and its synergies withother telescopes (with particular emphasis on the MeerKAT HI intensity mapping project), HIgalaxy science, machine learning, and radio …
Measurements of the dependence of stellar specific angular momentum (j∗) on stellar mass (M∗) are presented for large samples of ALFALFA galaxies spanning the stellar mass range ∼108-1011 M⊙. Accurate estimates of j∗ are generated using measurements of I-band effective radius and velocity width of the HI line profile. While the full sample (N=3 607) of galaxies yields a j∗-M∗ relation with power-law index α=0.404±0.03, …
In this paper we combine the Early Science radio continuum data from the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey, with optical and near-infrared data and release the cross-matched catalogues. The radio data used in this work covers 0.86 deg2 of the COSMOS field, reaches a thermal noise of 1.7 μJy/beam and contains 6102 radio components. We visually inspect and cross-match …
Primordial features, in particular oscillatory signals, imprinted in the primordial power spectrum of density perturbations represent a clear window of opportunity for detecting new physics at high-energy scales. Future spectroscopic and photometric measurements from the Euclid space mission will provide unique constraints on the primordial power spectrum, thanks to the redshift coverage and high-accuracy measurement of nonlinear …
The Centre for Radio Cosmology (CRC) in the Department of Physics & Astronomy at UWC isinternationally recognised for its research in cosmology and galaxy evolution with MeerKAT, theSquare Kilometre Array (SKA) and other telescopes (see astro.uwc.ac.za for further details). In 2023, the CRC research team includes 24 PhD/ MSc students and 11 postdoctoral fellows.Postgraduate students …
We present a new end-to-end pipeline for Mock Observations of X-ray Halos and Analysis (MOXHA) for hydrodynamic simulations of massive halos, and use it to investigate X-ray scaling relations and hydrostatic mass bias in the Simba cosmological hydrodynamic simulation for halos with ?500 ∼ 1013−15 ?⊙ . MOXHA ties together existing yT-based software packages and …
The first direct measurements of the HI intensity mapping power spectrum were recently made using the MeerKAT telescope. These measurements are on nonlinear scales, at redshifts 0.32 and 0.44. We develop a formalism for modelling small-scale power in redshift space, within the context of the mass-weighted HI halo model framework. This model is consistent with …
We present and compare several methods to mitigate time-correlated (1/f) noise within the HI intensity mapping component of the MeerKAT Large Area Synoptic Survey (MeerKLASS). By simulating scan strategies, the HI signal, white and correlated noise, we assess the ability of various data processing pipelines to recover the power spectrum of HI brightness temperature fluctuations. …
The Centre for Radio Cosmology (CRC) at UWC is internationally recognised for its research in cosmology and galaxy evolution with MeerKAT, the Square Kilometre Array (SKA) and other telescopes (see astro.uwc.ac.za for further details). In 2023, the CRC research team includes 24 PhD/ MSc students and 11 postdoctoral fellows. Postgraduate students at the CRC work …
