I have put together a collection of information and links for reducing Keck data. This is a work in progress, and hopefully always will be. Suggestions and ideas are certainly appreciated.
Data Reduction Software:
This can be a pain. I have written a short how-to and given some example Makefiles.
These are throughput measurements using standard stars of various gratings on LRISr. Also include is a LRISb grism (300/5000).
Much of my research focuses on the properties of cluster early-type galaxies. These objects are passively evolving - there is little or no evidence for ongoing star-formation - and they are generally massive systems. We are studying these systems to understand how old the stars in them are, and to see if the population of these objects are changing with time. As these galaxies live in massive clusters, they are constant undergoing dynamic interactions, and new galaxies are being added to the cluster all of the time.
Recently I have been part of an effort to study massive galaxies at a redshift of 2, roughly 10 to 11 billion years ago. These galaxies look like the progenitors of the cluster early-type galaxies I study, they have little or no star-formation, they are smooth and regular, and they are massive. However, these objects are young, with inferred ages of only 500 million years.
Another way to understand how the galaxies in clusters change with time is to find the galaxies that will become part of the cluster in the future. We are surveying the regions around two massive clusters to find the future cluster galaxies, and study what happens to them before they fall into the cluster itself.
Massive cluster galaxies generally have old stars in them, with ages of 12 or so billion years. By finding the galaxies forming stars vigorously 12 billion years ago, we should be finding the progenitors of these massive galaxies.
Go back to UCO/Lick Observatory homepage. holden at ucolick.org
Any thought, idea, or opinion expressed in this document in no way reflects upon the policies University of California or UCO/Lick Observatories. Everything here is mine and mine alone.