A kinematical study of the Giant H II Regions in NGC 4449
We present the results of a kinematical study of the H II regions in the central area of the giant irregular galaxy NGC 4449. A new method is defined to...
A Large, ``Fair", Sample of Halo and Thick Disk Stars from the SDSS
The structure and evolution of the Milky Way is imprinted on the kinematics, chemical abundances, and spatial distribution of its constituent stars. In the past...
A laser frequency comb featuring sub-cm/s precision for routine operation on HARPS
We present a re-engineered version of the laser frequency comb that has proven a few-cm/s calibration repeatability on the HARPS spectrograph during past...
The use of a liquid crystal as an optical modulator for use with a resonant scattering spectrometer has been investigated. Preliminary data indicate that using...