5.4k citations · 23.5k across the 91 of their papers we have counts for
4 papers · 2 filters
Young star clusters in M31
Heather Morrison, Nelson Caldwell, Paul Harding +3
In our study of M31's globular cluster system with MMT/Hectospec, we have obtained high-quality spectra of 85 clusters with ages less than 1 Gyr. With the exception of Hubble V, th…
Halo Star Streams in the Solar Neighborhood
Amanda A. Kepley, Heather L. Morrison, Amina Helmi +6
We have assembled a sample of halo stars in the solar neighborhood to look for halo substructure in velocity and angular momentum space. Our sample includes red giants, RR Lyrae, a…
Exploring the Variable Sky with the Sloan Digital Sky Survey
Branimir Sesar, Zeljko Ivezic, Robert H. Lupton +29
We quantify the variability of faint unresolved optical sources using a catalog based on multiple SDSS imaging observations. The catalog covers SDSS Stripe 82, and contains 58 mill…
H-delta in the Integrated Light of Galaxies: What Are We Actually Measuring?
L. C. Prochaska, J. A. Rose, N. Caldwell +5
We present a cautionary study exploring the reliability of the H-delta line in the integrated spectra of galaxies for determining galaxy ages. Our database consists of the observed…