William Harris (McMaster University, Hamilton, Canada)The Ages of Elliptical Galaxies - William Harris Colloquium |
|||
The Australia Telescope National Facility Colloquium | |||
15:30-16:30 Wed 29 Oct 2008 | |||
AAO Lecture Theatre |
|||
AbstractElliptical galaxies are complex mixes of stellar populations which probably formed from a combination of early starbursts and later satellite accretions and mergers. A powerful way to determine the internal age distribution of their stars and the enrichment history is by direct matching of the color-magnitude data for their halo stars to model distributions. Although this method is well understood in theory, it has become possible to apply in practice to E galaxies only because of superb new deep HST data. I will discuss the results we are finding for a range of small-to-large ellipticals including M32 in the Local Group, NGC 5128 in Centaurus, and NGC 3377 and 3379 in the Leo group. The answers emerging from our study reveal a surprisingly varied mix of histories. |
|||
More information | |||
|
|||
Other Colloquia | |||
What's On |
This loads a font easier to read for people with dyslexia.
This renders the document in high contrast mode.
This renders the document as white on black
This can help those with trouble processing rapid screen movements.