News and Events
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Pulsar glitches and superfluid vortex dynamics
Wed 18th Dec 2019 @2:15 PM, level 7 Conference Room, David Caro Building George Howitt The University of Melbourne (Completion Seminar) Email: g.howitt@student.unimelb.edu.au Abstract Neutron stars are famously steady rotators, but some occasionally undergo sudden changes in their spin frequency known as glitches. I will discuss the theoretical and observational considerations for the origin of glitches in the superfluid interior of neutron stars, …
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Be X-ray binaries in the Small Magellanic Cloud: A hint of the accretion efficiency during mass transfer?
Wed 27th Nov 2019 @2:15 PM, level 7 Conference Room, David Caro Building Dr Serena Vinciguerra Max Planck Institute for Gravitational Physics Email: serena.vinciguerra@aei.mpg.de Abstract Be X-ray binaries (BeXBs) consist of rapidly rotating Be stars with neutron star companions accreting from the emission disk. We compare the observed population of BeXBs in the Small Magellanic Cloud to simulated populations of BeXB-like systems produced …
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Modelling the power spectrum on the light cone & preparing for the 4MOST redshift survey
Wed 20th Nov 2019 @2:15 PM, level 7, David Caro Building Dan Pryer Email: d.pryer@sussex.ac.uk Abstract This talk is broken into two parts: - The power spectrum is a powerful tool for measuring the large scale structure of the universe, and contains a wealth of cosmological information. As upcoming ’stage IV’ cosmology redshift surveys will map out the distribution of galaxies with a higher precision, …
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The build-up of mass and angular momentum in galaxies across morphology and environment with SAMI
Wed 6th Nov 2019 @2:15 PM, level 6 Opat Seminar Room, David Caro Building Dr Jesse van de Sande Email: jesse.vandesande@sydney.edu.au Abstract Studying the build-up of mass and angular momentum in galaxies is fundamental to understanding the large variations in morphology and star formation that we see in present-day galaxies. Integral Field Spectroscopy has revolutionised our capability of measuring resolved stellar kinematic data …
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Star formation, feedback, turbulence, and transport: towards a unified model for the dynamics of disc galaxies
Wed 30th Oct 2019 @2:15 PM, level 7, David Caro Building Prof Mark Krumholz Email: mark.krumholz@anu.edu.au Abstract In this talk, I review attempts to build a self-consistent model for the dynamical state of the interstellar medium (ISM) in star-forming galactic discs. Ideally such a model would incorporate star formation, stellar feedback, gravitational instability, the maintenance of turbulence, and transport of gas through the …
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Kinematics of star-forming galaxies at cosmic noon
Wed 23rd Oct 2019 @2:15 PM, level 7, David Caro Building Dr Marianne Girard Email: mgirard@swin.edu.au Abstract In this talk, I will present results from the KMOS Lensing Survey (KLENS) and KMOS Lens-Amplified Spectroscopic Survey (KLASS) that are exploiting gravitational lensing to study low-mass star-forming galaxies at 0.6<z<3.5. These star-forming galaxies are particularly interesting since they are Milky Way progenitors at this epoch. …
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Characterizing and Mitigating Radio Frequency Interference in Reionization Cosmology
Wed 9th Oct 2019 @2:15 PM, level 7, David Caro Building Mike Wilensky Email: mjw768@uw.edu Abstract Through radio interferometry, we use redshifted 21cm radiation from neutral Hydrogen as a probe into the universe's ionization history. The relevant wavelengths for observation are concurrent with those allocated for common radio broadcasts such as FM radio and digital television. Consequently, these transmissions can interfere with radio observations, …
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The Rise and Fall of the First Galaxies
Wed 2nd Oct 2019 @2:15 PM, level 7, David Caro Building Prof Ivo Labbe Email: ilabbe@swin.edu.au Abstract The formation of the first galaxies is one of the most exciting frontiers in studies of galaxy evolution. We can now find galaxies when the universe was only a few percent of its current age, trace their rapid growth with time, and observe massive galaxies quench star …
A list of recent colloquia, with slides in some cases, can be found here.