527 citations · 8.5k across the 128 of their papers we have counts for
8 papers · 2 filters
On the Nature of Ultra-faint Dwarf Galaxy Candidates. III. Horologium I, Pictor I, Grus I, and Phoenix II
Helmut Jerjen, Blair Conn, Dongwon Kim +1
We use deep Gemini/GMOS-S photometry to study the stellar populations of the recently discovered Milky Way satellite candidates Horologium I, Pictor I, Grus I, and Phoenix II…
RR Lyrae Variable Stars in the Crater II Dwarf Galaxy
Seok-Joo Joo, Jaemann Kyeong, Soung-Chul Yang +10
We report the detection of RR Lyrae variable stars in Crater II, a recently discovered large and diffuse satellite dwarf galaxy of the Milky Way (MW). Based on B, V time-series pho…
The disk averaged star formation relation for Local Volume dwarf galaxies
A. Lopez-Sanchez, C. D. P. Lagos, T. Young +1
Spatially resolved HI studies of dwarf galaxies have provided a wealth of precision data. However these high-quality, resolved observations are only possible for handful of dwarf g…
Chemical Abundances of new member stars in the Tucana II dwarf galaxy
Anirudh Chiti, Anna Frebel, Alexander P. Ji +3
We present chemical abundance measurements for seven stars with metallicities ranging from [Fe/H] = 3.3 to [Fe/H] = 2.4 in the Tucana II ultra-faint dwarf galaxy (UFD), based…
On The Nature of ultra-faint Dwarf Galaxy Candidates II: The case of Cetus II
Blair C. Conn, Helmut Jerjen, Dongwon Kim +1
We obtained deep Gemini GMOS-S photometry of the ultra-faint dwarf galaxy candidate Cetus II with the aim of providing stronger constraints on its size, luminosity and stella…
Tip of the red giant branch distances to the dwarf galaxies dw1335-29 and dw1340-30 in the Centaurus group
Oliver Müller, Marina Rejkuba, Helmut Jerjen
The abundance and spatial distribution of dwarf galaxies are excellent empirical benchmarks to test models of structure formation on small scales. The nearby Centaurus group, with…
The Leo-I group: new dwarf galaxy and UDG candidates
Oliver Müller, Helmut Jerjen, Bruno Binggeli
The study of dwarf galaxies and their environments provides crucial testbeds for predictions of cosmological models and insights on the structure formation on small cosmological sc…
A whirling plane of satellite galaxies around Centaurus A challenges cold dark matter cosmology
Oliver Müller, Marcel S. Pawlowski, Helmut Jerjen +1
The Milky Way and Andromeda galaxy are each surrounded by a thin plane of satellite galaxies that may be corotating. Cosmological simulations predict that most satellite galaxy sys…