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DTSTART;TZID=Australia/Perth:20260609T130000
DTEND;TZID=Australia/Perth:20260609T140000
DTSTAMP:20260612T201830
CREATED:20260609T035553Z
LAST-MODIFIED:20260609T035554Z
UID:19154-1781010000-1781013600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Dr Jack Radcliffe (University of Manchester)
DESCRIPTION:Very Long Baseline Interferometry for science and society \n\nAbstract: \n\nVery Long Baseline Interferometry (VLBI) combines signals from telescopes separated by continental distances to achieve the highest angular resolution in astronomy\, enabling direct imaging of phenomena ranging from Active Galactic Nuclei\, including the first images of a black hole shadow\, to star-forming regions and pulsars. Reaching this resolution requires aligning signals to nanosecond precision across baselines of thousands of kilometres. This same precision makes VLBI an indispensable tool in geodesy\, the study of Earth’s dynamic shape\, size\, and gravitational field\, underpinning applications from climate monitoring and natural disaster response to precision agriculture and navigation\, with an estimated economic contribution of ~1.34 trillion USD by 2030. \n\nIn this talk\, I highlight two areas in which I have been involved. First\, I discuss advances in wide-field VLBI surveys. Traditionally\, observations have targeted a single source per pointing\, with large surveys requiring years to accumulate meaningful samples. Computational improvements now enable imaging of multiple sources within a single field and access to lower frequencies through the International LOFAR Telescope. I present scientific and technical results from these surveys\, and describe new commensal survey programmes\, including one on the ATNF Long Baseline Array\, that will increase the number of sources studied at high resolution by two orders of magnitude. \n\nSecond\, I discuss VLBI’s broader societal impact. The Development in Africa with Radio Astronomy (DARA) programme has trained over 400 students across the African continent in radio astronomy over the past decade. Building on this foundation\, the GGOS-Africa project aims to develop geodetic infrastructure\, governance\, and human capacity across Africa. I present initial results from this project and outline the path forward. \n\nPlease note that the event timezone is AWST (UTC+8 hrs) \n\nLocation\n\nOrganiser\n\n\n \n\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-dr-jack-radcliffe-university-of-manchester/
LOCATION:CSIRO – Kensington\, Australian Resources Research Centre (ARRC)\, 26 Dick Perry Ave\, Kensington\, WA\, 6101\, Australia
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2026/06/APAD_pic_radcliffe.png
ORGANIZER;CN="Gemma Anderson":MAILTO:gemma.anderson@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260609T140000
DTEND;TZID=Australia/Sydney:20260609T150000
DTSTAMP:20260612T201830
CREATED:20260604T023943Z
LAST-MODIFIED:20260604T023944Z
UID:19140-1781013600-1781017200@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Paola Di Ninni (INAF)
DESCRIPTION:The Italian National Institute for Astrophysics (INAF): Radio astronomy projects and my dedicated research activity\n\nAbstract: \n\nI will talk about the Italian National Institute for Astrophysics (INAF)\, a public research institute consisting of more than 1\,400 people organized into 16 institutes spread from the North to the South of Italy. After an introduction to the diverse activities at INAF within the fields of technology\, astronomy\, and astrophysics\, I will focus on the field of radio astronomyby giving an overview of the Italian infrastructure: three radio telescopes located in Sardinia\, Sicily\, and Emilia-Romagna\, and INAF’s contribution to international projects such as SKA and ALMA. I will conclude by talking about my research experience at INAF\, where I dedicate my time to technologies for radio astronomy—an exciting field that bridges cutting-edge engineering with our deepest questions about the universe. \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-paola-di-ninni-inaf/
LOCATION:Marsfield Lecture Theatre\, 26 Pembroke Road\, Marsfield\, NSW\, 2122\, Australia
CATEGORIES:Colloquia
ORGANIZER;CN="Jishnu Thekkeppattu":MAILTO:Jishnunambissan.Thekkeppattu@csiro.au
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BEGIN:VEVENT
DTSTART;TZID=Australia/Perth:20260611T100000
DTEND;TZID=Australia/Perth:20260611T110000
DTSTAMP:20260612T201830
CREATED:20260527T022430Z
LAST-MODIFIED:20260527T022622Z
UID:19057-1781172000-1781175600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Dr Konstantinos Kolokythas (Rhodes University and SARAO)
DESCRIPTION:From Group Dynamics to Cluster Halos: A Multi-Band View of Galaxy Evolution in Groups and the Diffuse Skies in Clusters \n\nAbstract: \n\nMuch of the evolution of galaxies before they are assimilated into clusters occurs in groups where AGN feedback has the greatest impact on galaxy formation and evolution. Conversely\, clusters are the largest gravitationally bound structures in the Universe\, with radio observations being powerful tools for detecting diffuse cluster-scale synchrotron emission\, which conveys information about the cluster formation history. In the first part of this talk\, I will summarize results from studies of the central brightest group early-type galaxies (BGEs) of an optically selected\, statistically complete sample of 53 nearby groups (<80 Mpc; CLoGS sample)\, observed in radio 235/610 MHz (GMRT)\, CO (IRAM/APEX) and X-ray (Chandra and XMM-Newton) frequencies examining the balance between hot and cold gas (AGN feedback) and the AGN activity and star formation in groups\, presenting also updated results from MeerKAT L-Band observations.  In the second part\, I will summarise results from the recently published MeerKAT’s Galaxy Cluster Legacy Survey (MGCLS) diffuse radio emission catalogue work (Kolokythas et al. 2025)\, a project which originally comprised the first MeerKAT L-Band long-track observations of 115 galaxy clusters at 1.28 GHz across the Southern sky. I will focus on the discoveries and properties of the various diffuse radio emission structures detected in MGCLS galaxy clusters\, which reveal new areas of investigation in cluster formation and evolution that pave the way for the SKA era.  \n\nPlease note that the event timezone is AWST (UTC+8 hrs) \n\nLocation\n\nOrganiser\n\n\n \n\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-dr-konstantinos-kolokythas-rhodes-university-and-sarao/
LOCATION:CSIRO – Kensington\, Australian Resources Research Centre (ARRC)\, 26 Dick Perry Ave\, Kensington\, WA\, 6101\, Australia
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2026/05/MGCLSII_DEcatalogue_Mosaic_Konstantinos.png
ORGANIZER;CN="Gemma Anderson":MAILTO:gemma.anderson@csiro.au
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DTSTART;TZID=Australia/Sydney:20260617T150000
DTEND;TZID=Australia/Sydney:20260617T160000
DTSTAMP:20260612T201830
CREATED:20260610T233644Z
LAST-MODIFIED:20260610T233644Z
UID:19160-1781708400-1781712000@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Simon Ho (ANU)
DESCRIPTION:Fast Radio Transients in the nearby Universe\n\nAbstract: \n\nMotivated by the discovery of a repeating FRB associated with a globular cluster in the nearby galaxy M81\, this talk explores the origins of fast radio transients in old stellar environments and examines the relationship between FRBs and giant radio pulses (GPs) from neutron stars. Using MeerKAT ultra-high frequency (UHF) baseband observations of the millisecond pulsar PSR J1823-3021A in the globular cluster NGC 6624\, we detect more than 3.7×10^4 GPs per hour\, establishing it as one of the most prolific GP emitters known. Although the pulses exhibit complex temporal and spectral structures\, their energetics\, periodicity\, and statistical properties distinguish them from FRBs\, suggesting that GPs are unlikely to be direct low-energy analogues of the FRB population. We also investigate scintillation and coherent descattering\, demonstrating the feasibility of recovering intrinsic pulse structures from giant pulses in J1823-3021A. Extending this work to extragalactic systems\, we conduct a deep FAST search for FRBs from globular clusters in the nearby elliptical galaxy M49 (NGC 4472)\, covering ~4000 globular clusters. No FRBs are conclusively detected\, yielding stringent upper limits on FRB activity in globular clusters. Lastly\, in this talk\, I will briefly present the current status of the Bustling Universe Radio Survey Telescope in Taiwan (BURSTT)\, which is a dedicated survey aiming to search for FRBs in the nearby universe with its extremely wide field of view (~10\,000 square degrees). \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-simon-ho-anu/
LOCATION:Marsfield Lecture Theatre\, 26 Pembroke Road\, Marsfield\, NSW\, 2122\, Australia
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2026/06/telescopes.png
ORGANIZER;CN="Jishnu Thekkeppattu":MAILTO:Jishnunambissan.Thekkeppattu@csiro.au
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