225 citations · 315 across the 5 of their papers we have counts for
8 papers · 1 filter
Chemical Abundances of the Leo II Dwarf Galaxy
Matthew Shetrone, Michael H. Siegel, David O. Cook +1
We use previously-published moderate-resolution spectra in combination with stellar atmosphere models to derive the first measured chemical abundance ratios in the Leo II dSph gala…
Trimming Down the Willman 1 dSph
M. H. Siegel, M. D. Shetrone, M. Irwin
Willman 1 is a small low surface-brightness object identified in the Sloan Digital Sky Survey and tentatively classified as a very low luminosity dSph galaxy. Further study has sup…
The ACS Survey of Galactic Globular Clusters: M54 and Young Populations in the Sagittarius Dwarf Spheroidal Galaxy
Michael H. Siegel, Aaron Dotter, Steven R. Majewski +11
We present new Hubble Space Telescope photometry of the massive globular cluster M54 (NGC 6715) and the superposed core of the tidally disrupted Sagittarius (Sgr) dSph galaxy as pa…
V838 Mon and M31-RV: The Stellar Populations Angle
Michael H. Siegel, Howard E. Bond
Insight into the origin of unusual events like the eruption of V838 Mon can be obtained from studies of the stellar populations from which they arise. V838 Mon lies in an intriguin…
Hubble Space Telescope Imaging of the Outburst Site of M31 RV
Howard E. Bond, and Michael H. Siegel
M31 RV is a luminous red variable star that appeared for several months in the bulge of M31 during 1988. Unlike classical novae, M31 RV was cool throughout its outburst. Interest i…
Exploring Halo Substructure with Giant Stars: The Velocity Dispersion Profiles of the Ursa Minor and Draco Dwarf Spheroidals At Large Angular Separations
Ricardo R. Munoz, Peter M. Frinchaboy, Steven R. Majewski +6
We analyze velocity dispersion profiles for the Draco and Ursa Minor (UMi) dwarf spheroidal (dSph) galaxies based on published and new Keck HIRES spectra for stars in the outer UMi…