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DTSTART;TZID=Australia/Sydney:20210428T150000
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DTSTAMP:20260515T161443
CREATED:20250819T102751Z
LAST-MODIFIED:20250819T102751Z
UID:15003-1619622000-1619625600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Noor Masdiana Md Said (University of Tasmania / CSIRO)
DESCRIPTION:Intra-Day Variability of Active Galaxies\n\nAbstract\n\nIn this work I have undertaken a detailed investigation of the BL Lac object PKS B1144−379. This project utilised high-cadence flux density monitoring of interstellar scintillation with the University of Tasmania Ceduna 30m radio telescope at a frequency of 6.7 GHz. A complementary kinematic study of the sub parsec-scale jet of PKS B1144−379 has been undertaken\, using 8.6 GHz Very Long Baseline Interferometry (VLBI) data. The centimetre wavelength radio flux density of this source is known to vary on a range of timescales from a few days up to several months. The rapid (timescales of less than a day)\, apparent variability of this compact extragalactic radio source at radio wavelength is known as intraday variability (IDV). The current investigation shows conclusively that the rapid variability is the result of a propagation effect known as interstellar scintillation (ISS)\, which originates in the inhomogeneous interstellar medium (ISM). On the other hand\, the long-term variability (months to years) suggests that the source also exhibits substantial intrinsic evolution. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-noor-masdiana-md-said-university-of-tasmania-csiro/
LOCATION:NSW
CATEGORIES:Colloquia
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