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DTSTART;TZID=Australia/Sydney:20230906T150000
DTEND;TZID=Australia/Sydney:20230906T160000
DTSTAMP:20260518T040828
CREATED:20250819T071944Z
LAST-MODIFIED:20250819T071945Z
UID:14943-1694012400-1694016000@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Hyein Yoon (University of Sydney)
DESCRIPTION:FLASH – New searches for Extragalactic HI 21-cm absorption at 0.4 < z < 1.0\n\nAbstract\n\nFLASH (the First Large Absorption Survey in HI) is a wide-field radio survey searching for 21-cm line absorption at 0.4 < z < 1.0. The goal of the survey is to understand the evolution of the neutral gas in galaxies and its role in AGN accretion and feedback. In this talk\, I will highlight a set of new HI 21-cm absorption lines detected in the ASKAP Pilot Survey Phase 1 and 2. Both associated systems (where the HI gas is at the same redshift as the background radio source) and intervening systems (where the HI gas is in the foreground along the line-of-sight) will be discussed. Additionally\, I will report an update on the FLASH Full Survey\, which will continue for the next five years. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-hyein-yoon-university-of-sydney/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-06092023.png
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BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230913T150000
DTEND;TZID=Australia/Sydney:20230913T160000
DTSTAMP:20260518T040828
CREATED:20250819T071831Z
LAST-MODIFIED:20250819T071831Z
UID:14944-1694617200-1694620800@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Luke Davies (UWA)
DESCRIPTION:A Universal Murder Mystery – What is killing galaxies?\n\nAbstract\n\nThe Universe is dying. All across the cosmos for the last 10 billion years galaxies have been continuously killed\, and we still don’t know why. Today the Universe is littered with dead galaxies\, and their distribution is correlated with location (environment). This suggests that location is one of the prime suspects in this galactic whodunit. However\, previous observations and techniques have restricted us to only measuring galaxy environments in the nearby Universe\, inhibiting our ability to identify when\, where and why they are killed. In addition\, galaxy location might not be the only suspect in town. Monsters are hiding at the centres of the most massive galaxies\, ready to lead to their untimely demise. In this talk I will discuss various programs using large multi-wavelength surveys\, such as GAMA and DEVILS\, to explore the smoking gun factors that have led to the death of galaxies over the last 10billion years. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-luke-davies-uwa/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-13092023.jpg
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BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230920T150000
DTEND;TZID=Australia/Sydney:20230920T160000
DTSTAMP:20260518T040828
CREATED:20250819T071725Z
LAST-MODIFIED:20250819T071726Z
UID:14945-1695222000-1695225600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Anais Moller (Swinburne)
DESCRIPTION:Transients in the era of large scale surveys\n\nAbstract\n\nVera C. Rubin Observatory will open a new era for optical astronomy by imaging the Southern Sky at unprecedented depths. I will introduce Fink\, which will process Rubin’s millions transient detections every night. Fink not only processes immense datasets in real-time\, but selects the most promising candidates for a breadth of science using machine learning and multi-wavelength and messenger survey data. n To make a leap to this new era\, I will review the contributions of machine learning classification for transient science and cosmology in the Dark Energy Survey. I will then present results from Fink’s processing of the Zwicky Transient Survey\, as a precursor of Rubin. These results include selection methods and analyses of supernovae\, kilonovae and satellite glints. I will conclude with the potential of connecting Rubin’s data with other observing facilities for multi-wavelength and messenger astronomy and our current efforts with Australian facilities. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-anais-moller-swinburne/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-20092023.png
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BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230927T150000
DTEND;TZID=Australia/Sydney:20230927T160000
DTSTAMP:20260518T040828
CREATED:20250819T071655Z
LAST-MODIFIED:20250819T071656Z
UID:14946-1695826800-1695830400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Chayan Chatterjee (UWA)
DESCRIPTION:Enabling rapid discovery of gravitational waves using machine learning\n\nAbstract\n\nGravitational waves are ripples in spacetime curvature created by some of the most energetic events in the universe like the collisions of compact astrophysical objects like black holes and neutron stars. These ripples propagate through space at the speed of light and are detected by several km long laser interferometers called LIGO and Virgo\, located in the US and Italy. The simultaneous observation of gravitational waves and prompt electromagnetic emissions from the compact object mergers can help reveal properties of extreme matter and gravity during and immediately after the coalescence. However\, such simultaneous observations rely on rapid detection and sky localization of gravitational waves\, often requiring alerts to be sent out before merger. \n\n In this seminar\, I will describe different machine learning models that I have developed to solve challenging problems in rapid gravitational wave discovery – pre- and post-merger sky localization\, and waveform extraction from real detector data. I will demonstrate the accuracy and feasibility of these methods on simulated data as well as on real gravitational wave events detected during the first three observation runs of LIGO and Virgo. Finally\, I will talk about the future scope of this research work and highlight some of the other areas in gravitational wave astronomy where these deep learning techniques can be applied. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-chayan-chatterjee-uwa/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-27092023.jpg
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