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DTSTART;TZID=Australia/Sydney:20220309T150000
DTEND;TZID=Australia/Sydney:20220309T160000
DTSTAMP:20260516T041854
CREATED:20250819T081913Z
LAST-MODIFIED:20250820T025013Z
UID:14982-1646838000-1646841600@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Marcus Lower (CSIRO)
DESCRIPTION:A radio-loud magnetar with an identity crisis\n\nAbstract\n\nMagnetars are a rare class of highly magnetised neutron star. They are the primary source of local gamma-ray bursts and are speculated to produce a significant fraction of extragalactic fast radio bursts. Studying the local population of magnetars within the Milky Way is therefore key to understanding these highly energetic objects and the role they play in the transient sky. In this talk\, I will present the initial results of on-going project to monitor a peculiar radio-loud magnetar\, Swift J1818.0-1607\, with Murriyang\, the Parkes 64-m radio telescope. This includes the unusually pulsar-like properties of this object seen in early observations\, and a brief identity crisis in which the neutron star displayed a host of unique behaviour never before seen any other radio pulsar. \nWatch recording\nSlides\n\nMarcus_Lower_colloquiumDownload\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-marcus-lower-csiro/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-09032022-scaled.jpg
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DTSTART;TZID=Australia/Sydney:20220316T150000
DTEND;TZID=Australia/Sydney:20220316T160000
DTSTAMP:20260516T041854
CREATED:20250819T080622Z
LAST-MODIFIED:20250820T025109Z
UID:14981-1647442800-1647446400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Charlotte Ward (University of Maryland)
DESCRIPTION:Tracing the first massive black hole seeds and their merger-driven growth with the Zwicky Transient Facility.\n\nAbstract\n\nOver the last 3 years\, the Zwicky Transient Facility (ZTF) has demonstrated the capability of wide-field time-domain surveys to discover the important black hole populations which trace the formation of the first massive black hole seeds and their merger-driven growth. For instance\, our search for off-nuclear active galactic nuclei (AGN) in ZTF revealed 9 supermassive black holes (SMBHs) which may have been ejected from their host galaxy by gravitational wave recoil from SMBH mergers with misaligned spins. Likewise\, our search for variable intermediate mass black holes (IMBHs) in dwarf galaxies found 200 new IMBH candidates\, most of which could not have been found via their spectroscopic signatures alone. Finally\, our study of periodically variable AGN with double-peaked broad emission lines revealed how single AGN can mimic SMBH binaries and mergers. We found these rare black holes amongst large populations of AGN in part by using innovative forward modelling techniques to improve photometric sensitivity and measure the separations between variable objects and their host galaxies. Our work is an exciting precursor to the Legacy Survey of Space and Time which we expect to detect substantially larger populations of recoiling SMBH and IMBH candidates. \nWatch recording\nSlides\n\ncharlotte_ward_colloquiumDownload\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-charlotte-ward-university-of-maryland/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-16032022.jpg
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DTSTART;TZID=Australia/Sydney:20220323T150000
DTEND;TZID=Australia/Sydney:20220323T160000
DTSTAMP:20260516T041854
CREATED:20250819T080543Z
LAST-MODIFIED:20250819T080544Z
UID:14980-1648047600-1648051200@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Christian Reichardt (University of Melbourne)
DESCRIPTION:Searching for New Physics on the last covid-free* continent\n\nAbstract\n\nMeasurements of the polarisation of the cosmic microwave background (CMB) are an important tool to test our understanding of the Universe. Searches for the faint CMB B-mode signals offer the prospect of detecting inflationary gravitational waves on large angular scales and mapping out the large scale distribution of matter in the Universe through CMB lensing on smaller angular scales. The Antarctic plateau\, in addition to being one of the few places isolated enough to avoid covid\, is an exceptional site for microwave astronomy\, and is the home of the South Pole Telescope. I will show recent results from the SPT-3G camera on the South Pole Telescope. I will also say a few words about CMB-S4\, a new experiment being built for first light at the end of the decade. \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-christian-reichardt-university-of-melbourne/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-23032022.png
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