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X-WR-CALNAME:Australia Telescope National Facility
X-ORIGINAL-URL:https://www.atnf.csiro.au
X-WR-CALDESC:Events for Australia Telescope National Facility
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TZID:Australia/Perth
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DTSTART:20250101T000000
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DTSTART;TZID=Australia/Perth:20260527T130000
DTEND;TZID=Australia/Perth:20260527T140000
DTSTAMP:20260602T103334
CREATED:20260526T075305Z
LAST-MODIFIED:20260527T021904Z
UID:19039-1779886800-1779890400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Lindsey Oberhelman (ANU)
DESCRIPTION:The turbulent magnetic Milky Way\, deriving a turbulent field scale height from POSSUM data\n\nAbstract: \n\nUsing broadband polarimetric observations from the ASKAP POSSUM survey\, I investigate the turbulent magnetised interstellar medium of the Milky Way through Faraday complexity in more than 37\,000 polarised extragalactic radio sources. By applying QU-fitting to the Stokes Q and U spectra\, I measure Faraday broadening\, which traces fluctuations in the line-of-sight magnetic field and thermal electron density. I examine the Galactic latitude dependence of turbulence and interpret the results using the exponential disk model. The results also suggest a possible north–south asymmetry in the turbulent foreground\, potentially linked to Galactic structure\, spiral arms\, warp\, or the Magellanic system. I discuss the role of turbulence correlation length assumptions\, comparisons with pulsar scintillation and RM structure-function studies\, and ongoing work using RM structure functions to constrain the physical scales of turbulence probed by POSSUM.  \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-lindsey-oberhelman-anu/
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/Colloq-27052026.png
ORGANIZER;CN="Gemma Anderson":MAILTO:gemma.anderson@csiro.au
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