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DTSTART;TZID=Australia/Sydney:20230802T150000
DTEND;TZID=Australia/Sydney:20230802T160000
DTSTAMP:20260515T213224
CREATED:20250819T072235Z
LAST-MODIFIED:20250819T072235Z
UID:14938-1690988400-1690992000@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Shriharsh Tendulkar (NCRA\, India)
DESCRIPTION:Multi-scale and multi-wavelength searches for FRBs (and other wavelengths)\n\nAbstract\n\nFulfilling the true promise of fast radio bursts (FRBs) as cosmological probes\, understanding their origins\, and their association with other transients necessitates our understanding of the FRB emission mechanism\, their formation channel(s)\, and their local environments. Most emission mechanisms expect that the prompt radio emission represents a small fraction of the total energy released — a larger fraction of the energy should be released at higher frequency wavebands: optical\, UV\, X-ray and in some cases\, gravitational waves (GW) and neutrinos\, either as prompt emission or as a longer-lived afterglow. Given that the observed rates of FRBs are two to three orders of magnitude higher than the sky rates of any other extragalactic transient\, it is clear that most FRBs will not have detectable multi-wavelength counterparts. The X-ray bursts aligned with the FRB-like radio emission from SGR 1935+2154 highlight the need to be alert to the brightest and nearest FRBs since those will be the most likely to have detectable multi-wavelength counterparts. Theoretical expectations also highlight the need to search for radio transients not just in the millisecond timescale\, but also at second timescales\, an area of phase space that is badly ignored. In this talk\, I will discuss results from CHIME/FRB in trying to constrain counterparts of FRBs\, FRB-GRB connections\, and FRB-GW connections and our efforts to increase the phase space of radio transients by searching for not-so-fast radio bursts. For these science cases\, I will also discuss two new projects: The proposed All Sky Transient Radio Array (ASTRA)\, an ultra-wide field of view telescope to detect the brightest and nearest radio transients and Daksha\, a proposed all-sky X-ray mission with 2-satellites in antipodal orbits to increase the detection rate of GRBs and electromagnetic counterparts of GW events. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-shriharsh-tendulkar-ncra-india/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-02082023.jpg
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BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230809T150000
DTEND;TZID=Australia/Sydney:20230809T160000
DTSTAMP:20260515T213224
CREATED:20250819T072202Z
LAST-MODIFIED:20250819T072203Z
UID:14939-1691593200-1691596800@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Barnali Das (CSIRO)
DESCRIPTION:Coherent radio emission from hot magnetic stars\n\nAbstract\n\nHot magnetic stars are the perfect laboratories for understanding stellar magnetospheric phenomena due to the fact that their fields are extremely stable throughout their lifetimes\, and also have very simple topologies (dipolar in most cases). Their strong stellar winds interact with the magnetic fields giving rise to co-rotating magnetospheres extending up to several tens of stellar radii. The magnetosphere manifests itself via emission over a wide range of the electromagnetic spectrum\, starting from radio to X-ray. These emissions convey different kinds of information\, and together\, they act as probes for wind-magnetic field interplay. Among the different emissions that these magnetospheres produce\, the latest discovered\, and consequently\, the least understood one is the coherent radio emission\, also referred to as auroral radio emission. This is produced by electron cyclotron maser emission (ECME\, the same mechanism that drives auroral radio emission from magnetic ultracool dwarfs and planets). In my talk\, I will take you on our journey towards demystifying this phenomenon\, starting with some serendipitous discoveries\, followed by a systematic sub-GHz survey\, which ironically led to the discoveries of many more unexplained characteristics\, including discovery of radio flares\, in addition to providing solutions to existing problems. I will present the results that we have obtained so far regarding ECME incidence\, wideband properties and stability\, and potential scenarios to explain the observations. I will end with my future plan to obtain more definitive insights about magnetospheric operation and the role that ATNF instruments can play in achieving that goal. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-barnali-das-csiro/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-09082023.jpg
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BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230816T150000
DTEND;TZID=Australia/Sydney:20230816T160000
DTSTAMP:20260515T213224
CREATED:20250819T072130Z
LAST-MODIFIED:20250819T072131Z
UID:14940-1692198000-1692201600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Virginia Kilborn (Swinburne)
DESCRIPTION:HI surveys from next generation radio telescopes\n\nAbstract\n\nHydrogen is the most common element in the Universe. Powering star formation\, it plays a crucial role in the formation and evolution of galaxies. Observations of Neutral Hydrogen (HI) in the radio wavelength allow us to survey for galaxies in the nearby universe\, and next generation surveys from telescopes such as the Australian Square Kilometre Array Pathfinder (ASKAP)\, meerKAT and FAST are expected to provide redshifts\, kinematics and gas content of around hundreds of thousands of galaxies\, and probe the gaseous environment surrounding – and inbetween – galaxies. In this talk I’ll provide an overview of HI science\, what we’ve learnt to date\, and touch on some of the potential future results of these new telescopes. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-virginia-kilborn-swinburne/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-16082023.jpg
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DTSTART;TZID=Australia/Sydney:20230823T150000
DTEND;TZID=Australia/Sydney:20230823T160000
DTSTAMP:20260515T213224
CREATED:20250819T072036Z
LAST-MODIFIED:20250819T072036Z
UID:14941-1692802800-1692806400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Jennifer West (NSCC)
DESCRIPTION:Progress on understanding the Galactic magnetic field\n\nAbstract\n\nThe pursuit of understanding the structure and origin of the Milky Way’s magnetic field is a central science question driving several radio polarization surveys\, including the Polarization Sky Survey of the Universe’s Magnetism (POSSUM) and The Global Magneto-Ionic Medium Survey (GMIMS). I will give a brief overview of the progress we have made towards unravelling the answers to these questions. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-jennifer-west-nscc/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-23082023.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230830T150000
DTEND;TZID=Australia/Sydney:20230830T160000
DTSTAMP:20260515T213224
CREATED:20250819T072010Z
LAST-MODIFIED:20250819T072011Z
UID:14942-1693407600-1693411200@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Sarah Pearce (SKAO)
DESCRIPTION:The next generation of radio astronomy: progress on construction of the SKA Observatory\n\nAbstract\n\nThe SKA Observatory is now starting construction of its two telescopes\, SKA-Low and SKA-Mid\, on site in Western Australia and South Africa. This talk will provide the latest status on construction\, exploring the current and planned work at each site. It will also look at establishment of the Observatory worldwide\, with a particular focus on Australia and the partnerships with CSIRO. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-sarah-pearce-skao/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-30082023.jpg
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