I have switched to KeyNote in 2007. I provide the full iWork'08 KeyNote directory as a *.tar.gz file, as well as a PDF version, and a PowerPoint version. The last two version do not capture the full presentation, but it gives a pretty close copy.
- GHOSTS:Bulges, Halos, and the Stellar Outskirts of Disk Galaxies (KeyNote) (PDF) (PowerPoint). An updated version of the presentation below given at the Kapteyn Institute colloquium of June 5, 2008 in Groningen.
- GHOSTS:The Stellar Populations in the Outskirts of Disk Galaxies (KeyNote) (PDF) (PowerPoint). A presentation with some highlights of the GHOSTS survey that I presented at a JHU CAS seminar. It is an expended version of the talk I gave at the "Formation and Evolution of Galaxy Disks" meeting organized by the Vatican Observatory. It gives an introduction why one would like to study outskirtss of galaxies in the hierarcical galaxy formation picture, describes the advantages of using resolved stellar populations, and shows some results on a galaxy truncation in NGC4244, the age of a stream in M83, the amount of halo substructure in NGC4631 and NGC4565, and the minor axis bulge/halo profiles of the GHOSTS galaxies. It shows that stellar halos are tightly connected to classical bulges, but that later-type galaxies most likely have pseudo-bulges developed by secular evolution.
If .zip and .ppz files are provided as well for the presentations below this means that the presentation includes animations, which are poorly ported by PowerPoint due to the use of absolute file path names. You can either download the .ppz file and unpack it on a Window system with this pngsetup.exe excutable (you can create this executable, also for Macs, with your PowerPoint program by saving a presentation in Pack and Go format) or use the .ppt and .zip files and restore the links to the animations by hand.
- Luminous and Dark Matter in Nearby Spiral Galaxies (.ppt) I gave this talk at the NOAO in March 2004. It brings together a broad range of my research, putting my observational studies in the context of galaxy formation scenarios. I pay particular attention to the problems LambdaCDM is currently facing on small scales. This PowerPoint file is very big (67Mb) as it contains a number of high resolution HST/ACS images. Only try to download if you have a fast connection! The two animations needed on pages 4 and 5 can be downloaded with the talk below.
- Throwing Light on Dark Matter | How to detect dark matter and make galaxies (.ppt) (.zip) (.ppz) This is a presentation on detecting dark matter on different scales and how we think galaxies are formed hierarchically in a Cold Dark Matter (CDM) Universe. This talk is intended for an interested lay audience, without equations and with limited amount of jargon. Some of it may be useful for Astronomy 101 type lectures. It contains a lot of animations and is very big (85Mb). Only try to download if you have a fast connection!
- Mass-to-Light Ratios and Dark Matter in Spiral Galaxies An invited talk given at the "Star And Structure Formation:From First Light To The Milky Way" Astrophysics Conference, held August 18-22, 2003 at the ETH in Zurich, Switzerland. Uses the Bell & de Jong (2001) color-M/L relation to determine stellar mass distributions and to constrain dark matter distributions in spiral galaxies.
- The Stellar Populations, Mass-to-Light Ratios and Dark Matter in Spiral Galaxies This is a talk I gave at several locations late 2000, early 2001. It shows mainly the results of Bell & de Jong (2000) and Bell & de Jong (2001).
Some of these presentations contain materials I collected from the web. All of it is believed to be free of copyrights, please send me notice if you know otherwise. Feel free to use these materials in your own presentations, but please ask me permission before publishing any of these materials.