794 citations · 10k across the 110 of their papers we have counts for
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Characterizing the Circumgalactic Medium of the Lowest-Mass Galaxies: A Case Study of IC 1613
Yong Zheng, Andrew Emerick, Mary E. Putman +3
Using 10 sightlines observed with the Hubble Space Telescope/Cosmic Origins Spectrograph, we study the circumgalactic medium (CGM) and outflows of IC1613, which is a low-mass ($M_*…
NGC 6822 as a probe of dwarf galactic evolution
Brent Belland, Evan Kirby, Michael Boylan-Kolchin +1
NGC 6822 is the closest isolated dwarf irregular galaxy to the Milky Way. Its proximity and stellar mass (, large for a dwarf galaxy) allow for a detailed study of it…
Elemental Abundances in M31: Properties of the Inner Stellar Halo
Ivanna Escala, Evan N. Kirby, Karoline M. Gilbert +3
We present measurements of [Fe/H] and [/Fe] for 128 individual red giant branch stars (RGB) in the stellar halo of M31, including its Giant Stellar Stream (GSS), obtained using…
Focal ratio degradation for fiber positioner operation in astronomical spectrographs
Brent Belland, James Gunn, Dan Reiley +6
Focal ratio degradation (FRD), the increase of light's focal ratio between the input into an optical fiber and the output, is important to characterize for astronomical spectrograp…
Elemental Abundances in M31: Iron and Alpha Element Abundances in M31's Outer Halo
Karoline M. Gilbert, Jennifer Wojno, Evan N. Kirby +4
We present [Fe/H] and [/Fe] abundances, derived using spectral synthesis techniques, for stars in M31's outer stellar halo. The 21 [Fe/H] measurements and 7 [/Fe] measurement…
Elemental abundances in M31: [Fe/H] and [α/Fe] in M31 Dwarf Galaxies Using Coadded Spectra
Jennifer Wojno, Karoline M. Gilbert, Evan N. Kirby +5
We present chemical abundances of red giant branch (RGB) stars in the dwarf spheroidal (dSph) satellite system of Andromeda (M31), using spectral synthesis of medium resolution (R…
The Stars in M15 Were Born with the r-process
Evan N. Kirby, Gina Duggan, Enrico Ramirez-Ruiz +1
High-resolution spectroscopy of stars on the red giant branch (RGB) of the globular cluster M15 has revealed a large (~1 dex) dispersion in the abundances of r-process elements, li…
Manganese Indicates a Transition from Sub- to Near-Chandrasekhar Type Ia Supernovae in Dwarf Galaxies
Mithi A. C. de los Reyes, Evan N. Kirby, Ivo R. Seitenzahl +1
Manganese (Mn) abundances are sensitive probes of the progenitors of Type Ia supernovae (SNe). In this work, we present a catalog of manganese abundances in dwarf spheroidal satell…
Multiple Chemodynamic Stellar Populations of the Ursa Minor Dwarf Spheroidal Galaxy
Andrew B. Pace, Manoj Kaplinghat, Evan Kirby +6
We present a Bayesian method to identify multiple (chemodynamic) stellar populations in dwarf spheroidal galaxies (dSphs) using velocity, metallicity, and positional stellar data w…