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HEASA 2024

1–5 Oct 2024
Africa/Johannesburg timezone

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Session

Poster Session

2 Oct 2024, 16:00

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  1. 23. MIGHTEE: The radio luminosity and star-formation rate relation for galaxies in the COSMOS field
    Thando Mothogoane
    02/10/2024, 16:00
    Active Galactic Nuclei
    Poster

    Utilising the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Early Science data from the COSMOS field, we select radio-detected galaxies down to a radio flux density limit of 2 μJy. Source detection was performed using the PYTHON Blob Detector and Source Finder (pybdsf) catalogue. Cross-matching these detections with multiwavelength photometric data in the X-rays,...

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  2. 24. Refinement of the Proposed Gamma-Ray Burst Time Delay Model
    Mr Godson ABBEY (Copperbelt University Zambia)
    02/10/2024, 16:00
    Transients
    Poster

    This paper is the second instalment in our study of the observed time delay in the arrival times of radio photons emanating from Gamma-ray Bursts (GRBs). The mundane assumption in contemporary physics as to the cause of these pondersome time delays is that they are a result of the photon being endowed with a non-zero mass. While we do not rule out the possibility of a non-zero mass for the...

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  3. 34. Relativistic Dynamics and Structure Formation in a Friedmann Universe
    Kennedy Konga (Meru University of Science and Technology, Africa Pulsar timing)
    02/10/2024, 16:00
    Other High-Energy Sources
    Poster

    The Friedmann-Lemaître-Robertson-Walker (FLRW) model, which forms the foundation of the Lambda Cold Dark Matter (LCDM) framework, is a key pillar in cosmology. It has effectively explained the formation and evolution of cosmic structures in line with most observational data. Central to the FLRW model is the cosmological principle, asserting that the universe is homogeneous and isotropic on...

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  4. 2. Studying the southerly eclipsing millisecond pulsar J1748−2446A using MeerKAT
    Senate Lekomola, Senate Lekomola
    02/10/2024, 16:00
    Pulsars and Pulsar Wind Nebulae
    Poster

    In this discussion we will be focusing on the changes of the dispersion measure (DM), rotation measure (RM) and scattering characteristics of PSR J1748-2446A. PSR J1748-2446A is a "spider” binary in Terzan 5 where the pulsar blasts the surface of its orbiting companion star away. We used data from the MeerKAT telescope at L-band frequencies to look at the complex eclipse of this spider...

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  5. 8. The evolution of the 98 GHz ACT source population since z = 4.5
    Obakeng Phiri (Student)
    02/10/2024, 16:00
    Active Galactic Nuclei
    Poster

    This research focuses on more than 15,000-millimetre wavelength sources, Observed using the Atacama Cosmology Telescope. These sources cover an area of approximately 18,000 square degrees. The ACT data observed at 98 GHz allows us to have a large population of AGNs at different redshift bands, making it possible to study the light these AGNs released at a redshift of up to 4.5, corresponding...

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  6. 3. The study of extended radio galaxies in MERGHERS fields
    Banele Mthembu (University of KwaZulu-Natal (National Astrophysics & Space Science Programme))
    02/10/2024, 16:00
    Active Galactic Nuclei
    Poster

    Radio galaxies play an important role in the formation of structure in the Universe. Studying the physical properties of both classical radio galaxies (FRI and FRII), as well as their more morphologically complex counterparts (NATs, WATs, BTs, X-shaped, etc), can help in understanding their specific role and how their local environment affects their properties, and vice versa. The MERGHERS...

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