AAO Colloquia

The AAO organises frequent colloquia at our North Ryde headquarters. These are usually held Thursday morning at 11:00 am, though other dates are occasionally scheduled. We welcome talks from visiting astronomers - if you are passing through Sydney and would like to tell us about your work, please fill out the AAO Visitor Form. The ATNF (Australia Telescope National Facility) also organises colloquia at their Epping offices. A schedule for these talks can be found on the ATNF Colloquia webpage. The AAO and ATNF occasionally organise Joint Colloquia when the speaker is likely to be of interest to both radio and optical communities. These talks will be found in both the list below, and the ATNF schedule. A list of past speakers can also be found below.

Next Scheduled AAO Colloquium

Hayley Macpherson, speaking on "Radial velocities and membership analysis of stars within NGC 5617 and Trumpler 22", to be held in the AAO Meeting Room (Room 7, 1st Floor, Building 2) at 02:00PM on Tuesday 3rd February, 2015.
Abstract:
The two open star clusters NGC 5617 and Trumpler 22 are a proposed primordial binary pair, formed from the same giant molecular cloud at the same time, and have remained bound ever since. Gayandhi De Silva has obtained HERMES spectra from 50 stars across both clusters, and from these I have derived radial velocities for each star through two different methods. These radial velocities, paired with colour magnitude diagram (CMD) analysis, have confirmed membership for 38 stars, found 6 non-members and left 6 stars with inconclusive results. The average velocity for Trumpler 22 was found to be -34.78 km/s and -36.32 km/s for NGC 5617. These similar averages across both clusters supports the theory these are a primordial pair. I will discuss both methods used to derive these velocities, their implications and possible future studies to further the evidence in favour of primordial star cluster formation.

This is a 30 min talk.

 

Upcoming Scheduled Colloquia

DateTimeLocationSpeakerTitle
Tuesday 3rd February, 201502:00PMAAO Meeting Room (Room 7, 1st Floor, Building 2)Hayley Macpherson (AAO Summer Student)Radial velocities and membership analysis of stars within NGC 5617 and Trumpler 22
Thursday 5th February, 201511:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Peter Wizinowich (Keck Observatory, Hawaii, USA)Adaptive Optics at W. M. Keck Observatory
Friday 20th February, 201511:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Summer Students (AAO)TBD
Thursday 19th March, 201511:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Anna Frebel (TBA)TBA

Past Colloquia

DateTimeLocationSpeakerTitle
Tuesday 27th January, 201502:00PMAAO Meeting Room (Room 7, 1st Floor, Building 2)Henry Poetrodjojo (AAO Summer Student)Astrometry and calibration of the 2dF robotic positioner
Friday 16th January, 201511:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Andrew Bunker (ANU / University of Oxford)High Redshift Galaxies and the Epoch of Reionization
Thursday 15th January, 201511:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Chiaki Kobayashi (ANU / U Herfordshire)Cosmological simulations with AGN feedback
Wednesday 10th December, 201411:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Tomas Ruiz-Lara (Universidad de Granada, Spain)Shedding light into the faintest parts of spiral galaxies. Stellar content in the outer regions.
Tuesday 25th November, 201403:15PMAAO Meeting Room (Room 7, 1st Floor, Building 2)Sabine Bellstedt and David (Brint) Gardner (University of Wollongong and Macquarie University)Student Talks on Distant Galaxy Clusters (see below)
Friday 21st November, 201402:00PMAAO Meeting Room (Room 7, 1st Floor, Building 2)Ricardo Carrera (IAC)The Open Cluster Chemical Abundances from Spanish Observatories survey (OCCASO)
Tuesday 18th November, 201411:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Michael Childress (ANU)Progenitors of Type Ia Supernovae
Friday 14th November, 201411:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Luca Cortese (Swinburne)Galaxy transformation and quenching in the local Universe
Thursday 13th November, 201411:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)Jillian Bellovary (Vanderbilt)Scrutinizing the Relationship Between Galaxies and Supermassive Black Holes
Thursday 6th November, 201411:00AMAAO Meeting Room (Room 7, 1st Floor, Building 2)D. John Hillier (University of Pittsburgh )Probing the Secrets of Ia Supernovae through their Spectra and Light Curves
Show all past colloquia