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DTSTART;TZID=Australia/Sydney:20260701T150000
DTEND;TZID=Australia/Sydney:20260701T160000
DTSTAMP:20260629T012710Z
CREATED:20260624T021222Z
LAST-MODIFIED:20260629T012710Z
UID:19250-1782918000-1782921600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Macon Magno (Texas A&M University)
DESCRIPTION:A Complete Census of the Properties of Radio-Quiet AGN in the Local Universe: Implications for Black Holes and AGN Feedback\n\nAbstract: \n\nActive Galactic Nuclei (AGN) are among the most energetic objects in the Universe\, powered by accretion onto supermassive black holes. Despite decades of study\, many questions remain about how AGN generate radio emission and interact with their host galaxies. In this talk\, I will present results from three radio studies of nearby AGN. First\, I will discuss the final phase of the largest 22 GHz\, 1” resolution imaging survey of 231 nearby Swift-BAT selected AGN. We find a wide range of radio morphologies and show that the compact radio cores are consistent with coronal emission\, while the extended emission is largely associated with star formation. Next\, I will present radio spectral energy distributions for 100 AGN spanning frequencies from tens of MHz to hundreds of GHz. Using a Bayesian modeling framework\, we find that fewer than half of the sources are well described by a simple power law\, highlighting the complexity of AGN radio emission and the need for broad frequency coverage to uncover the physical processes shaping AGN spectra. Finally\, I will present high-resolution VLA observations of a water maser in the Seyfert 2 galaxy NGC 1106. Rather than originating in the accretion disk\, we localize the maser approximately one kpc from the nucleus\, where it is likely produced by an interaction between an AGN-driven outflow and the surrounding interstellar medium. Together\, these results provide new insights into the origin of radio emission in AGN and the ways in which AGN interact with their host galaxies. \n\nPlease note that this colloquium will be held in the Marsfield Lecture theatre \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-macon-magno-texas-am-university/
LOCATION:Marsfield Lecture Theatre\, 26 Pembroke Road\, Marsfield\, NSW\, 2122\, Australia
CATEGORIES:Colloquia
ORGANIZER;CN="Jishnu Thekkeppattu":MAILTO:Jishnunambissan.Thekkeppattu@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260702T120000
DTEND;TZID=Australia/Sydney:20260702T123000
DTSTAMP:20260629T021153Z
CREATED:20260629T021152Z
LAST-MODIFIED:20260629T021153Z
UID:19273-1782993600-1782995400@www.atnf.csiro.au
SUMMARY:Colearnium: Gemma Anderson (CSIRO)
DESCRIPTION:TRACE-T: Transient RApid-response using Coordinated Event Triggering\n\nThis week Gemma Anderson will tell us about “TRACE-T: Transient RApid-response using Coordinated Event Triggering“. \n\nFrom Gemma: “Over the last several years\, I have worked with ADACS to develop TRACE-T\, which automates rapid-response follow-up of transients using radio telescopes. It includes a web application that enables the user to select\, receive and parse transient alert streams\, which go through user-defined decision logic\, automatically pushing observations requests to downstream telescopes. TRACE-T can trigger observations with the Murchison Widefield Array (MWA) and was capable of doing the same with ATCA in the CABB era. We plan to use TRACE-T to trigger rapid-response observations with ATCA-BIGCAT.“ \n\n \n\n\n\nPlease let me know if you’re willing to present at a future co-learnium or have requests for specific talks\, thanks! \n\nKind regards\, \n\nStefan Duchesne \n\nTeams meeting link below: \nTeams Meeting\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/colearnium-gemma-anderson-csiro/
LOCATION:NSW
CATEGORIES:Colearnia
ORGANIZER;CN="Stefan Duchesne":MAILTO:Stefan.Duchesne@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260715T150000
DTEND;TZID=Australia/Sydney:20260715T160000
DTSTAMP:20260713T000627Z
CREATED:20260713T000626Z
LAST-MODIFIED:20260713T000627Z
UID:19453-1784127600-1784131200@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Emily Kerrison (University of Sydney & ATNF)
DESCRIPTION:Understanding young active galaxies across the radio spectrum\n\nAbstract: \n\nThe lifecycle of active galaxies is an open question in modern astronomy. In particular\, not all active galaxies are active radio galaxies\, and it is not obvious why. In this talk I’ll discuss my thesis work on these active radio galaxies\, completed as part of the First Large Absorption Survey in HI\, and conducted with the Australian SKA Pathfinder (ASKAP-FLASH). Early on\, we realised many HI detections in ASKAP-FLASH were made towards so-called ‘Peaked Spectrum’ sources\, active galaxies in which the synchrotron jets are still embedded in the dense\, nuclear gas of their host galaxy. I’ll discuss how we identify these objects from pre-existing survey data using a Bayesian framework\, RadioSED\, and how a multiwavelength analysis of the resulting samples shows many are distant\, capable of probing galaxy-scale interactions at cosmic noon and beyond. Moving from observations to simulations\, I’ll show how we can test the impact of system geometry and morphology on FLASH detection rates using cosmological simulations as a sandbox. Ultimately\, I wish to highlight the role of peaked spectrum sources in studies of active galaxy evolution\, jet-gas interactions\, and the changing distribution of gas across the different ages of our Universe. \n\n \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-emily-kerrison-university-of-sydney-atnf/
LOCATION:Marsfield Lecture Theatre\, 26 Pembroke Road\, Marsfield\, NSW\, 2122\, Australia
CATEGORIES:Colloquia
ORGANIZER;CN="Jishnu Thekkeppattu":MAILTO:Jishnunambissan.Thekkeppattu@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260716T120000
DTEND;TZID=Australia/Sydney:20260716T123000
DTSTAMP:20260713T032203Z
CREATED:20260713T032202Z
LAST-MODIFIED:20260713T032203Z
UID:19462-1784203200-1784205000@www.atnf.csiro.au
SUMMARY:Colearnium: Paulus Lahur (CSIRO)
DESCRIPTION:Evolution as an Invention Machine: How a Computer Autonomously Designed Industrial Static Mixers\n\nThis week Paulus Lahur will tell us about “Evolution as an Invention Machine: How a Computer Autonomously Designed Industrial Static Mixers“. \n\nAn introduction from Paulus: “It’s always intriguing to learn about research that our colleagues are doing in the other parts of CSIRO. This talk is about one of my past projects with colleagues in Data61 and Manufacturing. The topic is about how we used Genetic Algorithm (GA) to design a fluid-mixing device that outperformed that of human-designed one. Although much less popular than Machine Learning\, GA is also part of AI family. One of its major features is that it does not use training data; instead\, it relies on physics simulations.“ \n\n \n\n\n\nPlease let me know if you’re willing to present at a future co-learnium or have requests for specific talks\, thanks! \n\nKind regards\, \n\nStefan Duchesne \n\nTeams meeting link below: \nTeams Meeting\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/colearnium-paulus-lahur-csiro/
LOCATION:NSW
CATEGORIES:Colearnia
ORGANIZER;CN="Stefan Duchesne":MAILTO:Stefan.Duchesne@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260723T120000
DTEND;TZID=Australia/Sydney:20260723T123000
DTSTAMP:20260720T024023Z
CREATED:20260720T024022Z
LAST-MODIFIED:20260720T024023Z
UID:19536-1784808000-1784809800@www.atnf.csiro.au
SUMMARY:Colearnium: Karen Lee-Waddell (UWA/CSIRO)
DESCRIPTION:Economics 101: how issues with the global oil supply can lead to stagflation\n\nThis week Karen Lee-Waddell will tell us about “Economics 101: how issues with the global oil supply can lead to stagflation“. \n\n \n\n \n\n\n\nPlease let me know if you’re willing to present at a future co-learnium or have requests for specific talks\, thanks! \n\nKind regards\, \n\nStefan Duchesne \n\nTeams meeting link below: \nTeams Meeting\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/colearnium-karen-lee-waddell-uwa-csiro/
LOCATION:NSW
CATEGORIES:Colearnia
ORGANIZER;CN="Stefan Duchesne":MAILTO:Stefan.Duchesne@csiro.au
END:VEVENT
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DTSTART;TZID=Australia/Sydney:20260728T150000
DTEND;TZID=Australia/Sydney:20260728T160000
DTSTAMP:20260722T021053Z
CREATED:20260722T020906Z
LAST-MODIFIED:20260722T021053Z
UID:19542-1785250800-1785254400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Anna Ho (Cornell University)
DESCRIPTION:TBD\n\nAbstract: \n\nTBD \n\n \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-anna-ho-cornell/
LOCATION:Marsfield Lecture Theatre\, 26 Pembroke Road\, Marsfield\, NSW\, 2122\, Australia
CATEGORIES:Colloquia
ORGANIZER;CN="Jishnu Thekkeppattu":MAILTO:Jishnunambissan.Thekkeppattu@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260729T150000
DTEND;TZID=Australia/Sydney:20260729T160000
DTSTAMP:20260722T020850Z
CREATED:20260722T020849Z
LAST-MODIFIED:20260722T020850Z
UID:19541-1785337200-1785340800@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Harshda Saxena (Caltech)
DESCRIPTION:A Multi-Wavelength Study of Cluster Cosmology and Astrophysics\n\nAbstract: \n\nGalaxy clusters are powerful probes of both cosmology and astrophysics\, tracing the growth of large-scale structure while providing a laboratory for studying the physics of the intracluster medium (ICM) and Active Galactic Nuclei (AGN). In this talk\, I will present my thesis work which uses multi-wavelength observations and simulations to characterize key astrophysics that affect cluster-based cosmological measurements. I will discuss how millimeter emission from cluster-member AGNs contaminates Sunyaev-Zel’dovich (SZ) cluster surveys\, including our recovery of two clusters in ACT maps using CARMA data. Building on this work\, I will present our plans for ongoing ATCA observations of millimeter-bright AGNs in the SPT-Deep field\, which will provide the first constraints on AGN-induced biases in a complete SZ-selected cluster sample. I will also discuss our previous work to quantify the impact of another astrophysical systematic\, cluster triaxiality\, on SZ selection\, which further leads to biases in weak-lensing mass estimates. To quantify the effect of this triaxiality\, our collaboration is developing a multi-probe framework that combines X-ray\, SZ\, and weak-lensing observations of clusters to constrain cluster geometry\, improve mass measurements\, and probe dark matter physics and mass accretion histories. In addition\, I will discuss ongoing work on cluster scaling relations using both observations and simulations\, with the goals of identifying low-scatter mass proxies and quantifying correlations between cluster observables. Finally\, I will present our work characterizing non-thermal pressure support in the ICM of clusters through combined SZ and X-ray fluctuation measurements\, representing the first such analysis using eROSITA and SZ data. \n\n \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-harshda-saxena-caltech/
LOCATION:Marsfield Lecture Theatre\, 26 Pembroke Road\, Marsfield\, NSW\, 2122\, Australia
CATEGORIES:Colloquia
ORGANIZER;CN="Jishnu Thekkeppattu":MAILTO:Jishnunambissan.Thekkeppattu@csiro.au
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260812T150000
DTEND;TZID=Australia/Sydney:20260812T160000
DTSTAMP:20260722T021023Z
CREATED:20260722T021022Z
LAST-MODIFIED:20260722T021023Z
UID:19545-1786546800-1786550400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Daniel Reardon (Swinburne University)
DESCRIPTION:TBD\n\nAbstract: \n\nTBD \n\n \nJoin Event on Microsoft Teams\nLocation\n\nOrganiser\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-daniel-reardon-swinburne-university/
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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