Spitzer Space Telescope observations of the Carina Nebula: The steady march of feedback-driven star formation

We report the first results of imaging the Carina Nebula with Spitzer/IRAC, providing a catalog of point sources and YSOs based on SED fits. We discuss several aspects of the extended emission, including dust pillars that result when a clumpy molecular cloud is shredded by massive star feedback. There are few "extended green objects" (EGOs) normally taken as signposts of outflow activity, and none of the HH jets detected optically are seen as EGOs. A population of "extended red objects" tends to be found around OB stars, some with clear bow-shocks. These are dusty shocks where stellar winds collide with flows off nearby clouds. Finally, the relative distributions of O stars and subclusters of YSOs as compared to dust pillars shows that while some YSOs are located within pillars, many more stars and YSOs reside just outside pillar heads. We suggest that pillars are transient phenomena, part of a continuous outwardly propagating wave of star formation driven by massive star feedback. As pillars are destroyed, they leave newly formed stars in their wake, which are then subsumed into the young OB association. Altogether, the current generation of YSOs shows no strong deviation from a normal IMF. The number of YSOs suggests a roughly constant star-formation rate over the past 3Myr, implying that star formation in pillars constitutes an important mechanism to construct unbound OB associations. Accelerated pillars may give birth to O-type stars that, after several Myr, could appear to have formed in isolation.Comment: 25 pages, 15 figures, MNRAS accepte

Public Sector Employment in the 21st Century

This book addresses the transformations which have occurred in employment arrangements and practices in the Australian public sector over the past decade and the changes in responsibilities and accountability through employment contracts, whistleblower legislation and partnerships between government and the private sector. It provides a comparative context through studies of reconstruction of the public service in the United Kingdom and New Zealand. Themes of contractualisation, privatisation and outsourcing are explored and critically examined, as well as influences of the industrial relations legislative framework including the Work Choices legislation

Amending the Industrial Relations Statute: An Australian Preoccupation

There is a popular perception that industrial relations as a public policy issue in Australia enjoys a prominence unparalleled in democratic states. The parliament is an important forum for the implementation of public policy. A study of federal parliamentary Bills concerned with industrial relations during the period 1956-1999 has identified 95 Bills linked to the Commonwealth's pnncipal industrial relations statute. The findings include the fact that the high level of parliamentary activity is not the preoccupation of a particular political party. It is, rather, an Australian preoccupation, with the number of Bills introduced by Liberal-National governments and Labor governments being roughly proportional to their respective periods of office. Thirty-three per cent of Bills were either defeated, lapsed or withdrawn although about half the Bills in this category were private members' Bills. The database reveals industrial relations as predominantly a contested area of public policy with less than 30 per cent of Bills being bipartisan and most of these being minor Bills dealing with minor issues. The paper explores areas for further research including the need to examine the relationship between public resources invested in changes in industrial relations legislation and practice outcomes

Public Sector Employment in the 21st Century

This book addresses the transformations which have occurred in employment arrangements and practices in the Australian public sector over the past decade and the changes in responsibilities and accountability through employment contracts, whistleblower legislation and partnerships between government and the private sector. It provides a comparative context through studies of reconstruction of the public service in the United Kingdom and New Zealand. Themes of contractualisation, privatisation and outsourcing are explored and critically examined, as well as influences of the industrial relations legislative framework including the Work Choices legislation