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STScI Webcast

2010 IFUs - JWST

Galaxy Evolution in 3D and the Pitfalls of Reducing Your GMOS IFU Data

Presented by: James Turner (Gemini Observatory)
Category: Science Workshops   Duration: 20 minutes   Broadcast date: October 27, 2010
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IFUs allow us to map the properties of galaxies undergoing evolutionary changes in full spatial and spectral detail, to study the processes at work by close comparison with model predictions. Our current project looks at a sample of low-to-intermediate redshift E+A galaxies from SDSS, with the goal of using numerical simulations incorporating stellar population synthesis codes (eg. Bekki et al., 2005) to help distinguish between and understand possible mechanisms for the E+A transition--such as major or minor mergers, tidal encounters and truncation of ordinary star formation. In the course of this project, we have spent significant effort on investigating data processing optimizations and complications that can arise when reducing GMOS IFU data. Some issues (such as kinematic discontinuities) were previously known but poorly understood. Here I give an overview of the main problems one is likely to encounter when reducing GMOS IFU data and how to mitigate them. Some of these factors will also be relevant for other IFUs. I will finish by presenting some preliminary analysis of our resulting, re-processed E+A galaxy data and discussing what we can tentatively conclude about their evolution.

Related Documents

James Turner's presentation PDF document (.pdf)