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Ordinary Meeting: "Understanding the complex nature of globular clusters: a chemical approach"

Friday 26th July 2013 - 8:00pm
Topic:
Understanding the complex nature of globular clusters: a chemical approach.
Speaker:   Dr Valentina D'Orazi, Macquarie University
Venue: Epping Creative Centre - 26 Stanley Road, Epping
Abstract: The traditional perspective of globular clusters as simple stellar populations is now overcome.  In the last years a huge number of observational studies have revealed the presence of significant internal variations in their light-element content (e.g., oxygen and sodium).

This extremely peculiar chemical pattern, which is not observed in field stars and/or in smaller stellar aggregates such as open clusters points to internal pollution processes and to the existence of multiple stellar generations. I will review our results from a large observational survey, carried out in the last four/five years, focused on light- and heavy-element abundance determinations. The general implications on cluster formation and early evolution scenarios will be also discussed.
Biography: I achieved my Laurea degree in Astronomy in 2005 at the University of Bologna (Italy)and subsequently obtained my PhD in Astronomy at the University of Florence (March 2009). I took up a post-doc research position at INAF -Osservatorio Astronomico di Padova in 2009.  I am currently an ARC Super Science Fellow at Department of Physics and Astronomy at Macquarie University (Sydney, Australia) and at the Monash Centre for Astrophyscis (Monash University, Melbourne, Australia).

My main research interests focus on the determination of chemical abundances,through high and intermediate resolution spectroscopic observations in the optical and near-infrared domains, of young and old stellar populations in star forming regions, young associations, open and globular clusters).  I have been a member of the Galactic Archeology project with Hermes (GALAH), where I am involved in the development of an automated pipeline for stellar parameter and abundance determination since 2011.

Event Date: 
Friday, 26 July, 2013 - 20:00
Location: 
Epping Creative Centre, 26 Stanley Road, Epping NSW

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