Speaker
Mr
Thembaloxolo Gqaza
(University of Cape Town)
Description
The future of analysing HI-data cubes with respect to understanding the evolution of the neutral
gas content in galaxies will take a giant leap forward. This is due to the advent of the HI-survey projects
that will be pursued with the Square Kilometer Array (SKA) and its Pathfinders. The forthcoming
HI-surveys will produce spectral data cubes of unprecedented size. In preparation for the huge data volumes that will be generated, various automated source identification and parametrisation applications have been developed (e.g. SOFIA; see Serra et al. 2016). While these algorithms have
been thoroughly tested on simulated HI data cubes (see Popping et al. 2012), they have not yet been evaluated in any systematic way on real data. In this paper, we present a comprehensive analysis of various source identification and parameterization methods of a three-dimensional large
HI data cube obtained with the Westerbork Synthesis Radio Telescope (WSRT). The source-finding and parameterisation tools conform of visual, fully-automated, and semi-automated inspection. Each source-finding method is applied to the WSRT data cube, as well as a simulated data cube with equivalent parameters to the WSRT cube. The latter is used for quantifying reliability and completeness of the three methods. The final results will allow optimisation of the various algorithms.
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Main supervisor (name and email)<br>and his / her institution
Prof Renee Kraan-Korteweg renee.kraankorteweg@gmail.com
University of Cape Town
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Primary author
Mr
Thembaloxolo Gqaza
(University of Cape Town)
Co-authors
Dr
Anja Schröder
(SAAO)
Dr
Bradley Frank
(University of Cape Town)
Prof.
Renee Kraan-Korteweg
(University of Cape Town)
Prof.
Tom Jarrett
(University of Cape Town)
