2014 Seminars

2014 Seminars

We aim to promote and encourage an active seminar series for the benefit of all centre members.

We welcome all visiting astronomers to Sydney to come and give us a Seminar and are especially keen for any overseas visitors to give us a talk.

Overnight accommodation can be provided if necessary.

Please contact Jan Staff our seminar organiser (jan.staff@mq.edu.au) for further information and assistance.

The Seminars usually take place at 3pm in room E6B 2.300, which is located on the second floor of the E6B building. It is a quick walk from the Macquarie University train station and the location of the building can be found using the campus map.

This week’s Seminar

December 12, 2014

Speaker: Michael Cowley

Title: A multi-wavelength study of the impact of AGN on their host galaxies

Abstract: An active galactic nucleus, or AGN, refers to the existence of energetic phenomena at the central region of galaxies, which cannot be attributed directly to stellar emission alone. Extensive local surveys in the radio, infrared and X-ray domains have revealed a substantial population of these active galaxies, which are now known to be powered by the accretion processes of supermassive black holes. This raises the question if the enormous amounts of energy liberated by accretion has any impact on host galaxies. In light of this, many galaxy evolution models now incorporate AGN processes and have been successful in reproducing key observables for the co-evolution of AGN and galaxies. However, a reoccurring suggestion that AGNs play a role in the quenching of star formation in blue disk-like galaxies and their transition to red-dead ellipticals, remains a topic of hot debate.

In an effort to help address this, we cross-match our near-infrared ZFOURGE catalogues with radio, x-ray and far-infrared sources to perform a multi-wavelength identification and investigation into the impact of AGNs on their host galaxies out to a redshift of z = 3.2. We compare the host galaxy properties (stellar populations, colours and morphology) of our AGN to those of a mass-similar sample of non-active hosts. In this talk, I will summarise my approach and present preliminary findings of the study.

Speaker: Danica Draskovic

Title: Multi-wavelength Quest for New Planetary Nebulae in the Small Magellanic Cloud and its Outskirts

Abstract: Planetary Nebulae (PNe) represents one of the final evolutionary stages of low- and intermediate-mass stars, lasting for just 25000 to 50000 years. Most stars from 1 to 8 solar masses will at some point go through the PN phase. However, the brevity of this phase limits the number of PNe visible at any one time, and there are currently ~3500 known in the Galaxy. The story with a local group galaxies is quite similar: ~800 in the Large Magellanic Cloud, ~80 in the Small Magellanic Cloud, and only 4 confirmed PN in the nearby Sagittarius dwarf galaxy, where numbers scale with size and mass. Studies of PNe in the local group galaxies are of huge importance because of the different host environments and metallicities that can shed light on the different galactic evolutionary processes in these systems.

PNe play a crucial role in understanding mass loss for low to intermediate mass stars and the chemical evolution of galaxies due to interstellar medium (ISM) enrichment via PNe ejecta. Their ionized shells exhibit numerous emission lines – excellent laboratories for understanding plasma physics. PNe are visible to great distances due to these strong lines that permit determination of the size, expansion velocity and age. The significance in studying PNe in local-group galaxies is that they are still sufficiently close to be amenable to individual scrutiny. In this project we concentrate on the SMC PNe population that are effectively co-located in a coherent and separate system at known distance. Furthermore, the SMC is sufficiently small in angular size and can be studied in its entirety.

Seminar Schedule 2014 (Subject to changes)

DateNameInstitutionTitle (link to Abstract)
14 FebruaryDr. Amy KimballCSIROThe Radio Luminosity Function of Optically Selected QSOs: Star Formation and AGNs
21 FebruaryJan StaffMacquarie UniversityEccentric binary interactions as origin of some optical transient phenomena and nebula formation
28 FebruaryDonald Goldsmith
14 March

21 MarchPablo Galaviz VilchisMacquarie UniversityBinary Black Hole mergers in f(R) theory
28 MarchIvan BojicicMacquarie UniversityThe MQ/AAO/Strasbourg Galactic PNe database
4 April
Christina BaldwinMacquarie UniversityEarly-Type Galaxy Stellar Populations in the Near-Infrared
David (Brint) GardnerMacquarie UniversitySearching for distant galaxy clusters
Rajika KuruwitaMacquarie UniversityFall back disks and the end of the Common Envelope phase
Tiffany DayMacquarie UniversityThe Flows of Neutral Hydrogen in the Grand Design Spiral Galaxy M83
April 11Jean-Claude PassyThe University of BonnCommon envelopes in binary stars: what we know and where to go
2 MayJames TocknellMacquarie UniversityConstraints on Common Envelope Magnetic Fields from
Observations of Jets in Planetary Nebulae
9 MayJulie BanfieldCSIROCitizen Science and Radio Galaxy Zoo
16 MayGeoffrey C. ClaytonLouisiana State UniversityWill R Coronae Borealis Ever Return to Maximum Light?
23 MayKarrie GilbertSpace Telescope Science InstituteStellar Halo Formation in a Hierarchical Universe: Lessons from Andromeda
30 MayDaniela CarolloMacquarie UniversityThe Halo System of the Milky Way and the CEMP Stars Connection
6 JuneNick CoxUniversity of LeuvenAsterospheres: Stellar-wind ISM interaction around young and old stars
13 JuneBirendra PandeyMacquarie UniversityThe stability of a magnetized thin disc

27 JuneRichard McDermidMacquarie UniversityResults from the Atlas3D Survey
4 JulyCaterina TiburziOsservatorio Astronomico di CagliariRisk of false detections in Pulsar Timing Array experiments
11 JulyDimitri DouchinMacquarie UniversityEstimating the Binary Fraction of Central Stars of Planetary Nebulae
1 August

8 August

15 AugustAngel Lopez-SanchezAAO and Macquarie UniversityDwarf star-forming galaxies and the assembly of spiral galaxies
18 AugustOded PapishTechnionExploding Core-Collapse Supernovae with Jittering Jets
22 AugustAndrew Lehmann and
Roberto Iaconi
Macquarie UniversityDissipation of Molecular Cloud Turbulence by Magnetohydrodynamic Shockwaves
Common envelope numerical simulations: What are we missing?
29 August

5 September

12 SeptemberGeorge HobbsCSIROPulsars, gravitational waves, clocks, planets, spacecraft and black holes
19 SeptemberColin Navin
Carlos Bacigalupo
Macquarie UniversityNew members of the galactic globular cluster NGC 1851
Hot Jupiters and Cluster Asteroseismology
26 SeptemberJoao BentoMacquarie University The Replicable High-resolution Exoplanets and Asteroseismology (RHEA) spectrograph
3 OctoberTrevor MendelMax Planck-Institute für extraterrestrische Physik Mergers, Interactions, and evolution of galaxies over the past 9 billion years
10 OctoberSarah Keith and Shane VickersMacquarie UniversityNon-ideal MHD in protoplanetary accretion zones.
andImproving the distances of Post-AGB stars and their kin.
17 OctoberMegan JohnsonCSIRO The Three LITTLE Dwarfs: Evolutionary tales uncovered by stars
24 OctoberNick CvetojevicUniversity of SydneyThesis celbration
31 OctoberKazufumi ToriiNagoya UniversityHigh-mass star formation via cloud-cloud collision
7 NovemberAntonino MarascoUniversity of Groningen Supernova-driven gas accretion in the Milky Way
14 NovemberJimi GreenSKA consortium The science driving the Square Kilometre Array
21 NovemberBrint Gardner
Rajika Kuruwita
Macquarie University

Searching for distant galaxy clusters


Fall back disks and the end of the common envelope phase Part 2: What have we found.

26 NovemberSimon CampbellMonash UniversityTowards 21st century stellar models: Star Clusters, Supercomputing, and Asteroseismology
5 DecemberWarren ReidMacquarie University A multi-wavelength investigation of newly discovered planetary nebulae in the Large Magellanic Cloud
12 DecemberMichael Cowley
Danica Draskovic
Macquarie University

A multi-wavelength study of the impact of AGN on their host galaxies


Multi-wavelength Quest for New Planetary Nebulae in the Small Magellanic Cloud and its Outskirts

The seminar schedule and titles for:

2014: here
2013: here
2012: here

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