News and Events
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Using Asteroseismology to Measure an Integrated Mass Loss for Evolved Stars in Globular Clusters
Wednesday 14 Sep 2022 @ 12:00 p.m., Level 6 Geoff Opat(+Zoom) Madeline Howell, Monash; Email: Madeline.Howell1[at]monash.edu Abstract Mass loss remains a major uncertainty in stellar modelling. In low-mass stars, mass loss is most significant on the red giant branch, and will impact the star's evolutionary path and final stellar remnant. Directly measuring the mass difference of stars in various phases of evolution represents …
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Understanding X-Ray Signatures of Outflows Through 3-D Simulations
Wednesday 07 Sep 2022 @ 12:00 p.m., Level 6 Geoff Opat(+Zoom) Dr Aditi Vijayan, ANU; Email: Aditi.Vijayan[at]anu.edu.au Abstract Outflows, generated either due to supernova (SN) activity in the disc of a star-forming disc or through the SMBH activity in a larger galaxy, are critical in understanding galaxy evolution. Such outflows are a complex phenomenon which I have studied using HD simulations. In this …
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Orbital structures of SAMI passive galaxies from orbit-superposition Schwarzschild models.
Wednesday 31 Aug 2022 @ 12:00 p.m., Laby Theatre(+Zoom) Dr Giulia Santucci, ICRAR/UWA; Email: g.santucci[at]unsw.edu.au Abstract Galaxy mergers are thought to play an important role in how galaxies evolve over time, however, extragalactic astronomers do not yet completely understand that merger process, its timing and dependence on galaxy mass. The internal kinematic structures of galaxies are driven by their merger histories, therefore, we …
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On Modelling Complex Systems in Astronomy
Wednesday 17 Aug 2022 @ 12:00 p.m., Laby Theatre(+Zoom) A Prof Yuan-Sen Ting, ANU; Email: yuan-sen.ting@anu.edu.au Abstract Astronomy today is fundamentally different than it was even just a decade ago. Our increasing ability to collect a large amount of data from ever more powerful instrumental has enabled many new opportunities. However, such opportunity also comes with new challenges. The bottleneck stems from the …
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Hydroxyl as a Probe of the Interstellar Medium
Wednesday 10 Aug 2022 @ 12:00 p.m., Zoom Dr Anita Petzler, CSIRO; Email: Anita.Petzler[at]csiro.au Abstract The molecular gas of the interstellar medium provides the raw material for star formation, yet its principle component – molecular hydrogen – is essentially invisible at radio wavelengths. Instead we must infer its presence and properties through the study of other tracer molecules, such as hydroxyl (OH). OH, …
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How do galaxies regulate their own star formation?
Wednesday 03 Aug 2022 @ 12:00 p.m., Laby Theatre(+Zoom) A Prof Deanne B. Fisher, Swinburne University; Email: dfisher[at]swin.edu.au Abstract Over 2/3 of all star formation in the Universe occurs in gas-rich, super-high pressure clumpy galaxies in the epoch of redshift z~1-3. However, because these galaxies are so distant we are limited in the information available to study the properties of star formation and …
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Leaks and bursts
Wednesday 27 Jul 2022 @ 12:00 p.m., Laby Theatre(+Zoom) Associate Professor Jeff Cooke, Swinburne University; Email: jeffreycooke[at]swin.edu.au Abstract In this talk, I will I first discuss work by our group on identifying and studying high-redshift (z ~ 3-5) star forming galaxies with massive stars that are leaking Lyman continuum photons to better understand the sources responsible for reionising the Universe. Secondly, I will …
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GALAHs excavating the formation of the Milky Way with starlight
Wednesday 20 Jul 2022 @ 12:00 p.m., Laby Theatre(+Zoom) Dr Sven Buder, ANU; Email: sven.buder[at]anu.edu.au Abstract The life-story of our Milky Way is missing key pages! In our ever-evolving Galaxy, our best hope is to use long-lived stars as time capsules. The industrial revolution of equipment in Galactic archaeology allows us to survey the stars of our Milky Way in unprecedented depth and detail. …
A list of recent colloquia, with slides in some cases, can be found here.
Upcoming Monday group talks can be found at here.