5 papers
Beryllium in Disk and Halo Stars -- Evidence for a Beryllium Dispersion in Old Stars
Ann Merchant Boesgaard, Megan C. Novicki
The study of Be in stars of differing metal content can elucidate the formation mechanisms and the Galactic chemical evolution of Be. We have obtained high-resolution, high signal-…
New Keck Observations of Lithium in Very Metal-poor Stars
Ann Merchant Boesgaard, Megan C. Novicki, Alex Stephens
Lithium abundances have been determined in more than 100 metal-poor halo stars both in the field and in clusters. From these data we find trends of Li with both temperature and met…
Beryllium in the Ultra-Lithium-Deficient,Metal-Poor Halo Dwarf, G186-26
Ann Merchant Boesgaard, Megan C. Novicki
The vast majority of low-metal halo dwarfs show a similar amount of Li; this has been attributed to the Li that was produced in the Big Bang. However, there are nine known halo sta…
The NN2 Flux Difference Method for Constructing Variable Object Light Curves
Brian J. Barris, John L. Tonry, Megan C. Novicki +1
We present a new method for optimally extracting point-source time variability information from a series of images. Differential photometry is generally best accomplished by subtra…
Small-Scale structure in the Galactic ISM: Implications for Galaxy Cluster Studies
Joel N. Bregman, Megan C. Novicki, Jessica E. Krick +1
Observations of extragalactic objects need to be corrected for Galactic absorption and this is often accomplished by using the measured 21 cm HI column. However, within the beam of…