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SMHASH: Anatomy of the Orphan Stream using RR Lyrae stars
David Hendel, Victoria Scowcroft, Kathryn V. Johnston +30
Stellar tidal streams provide an opportunity to study the motion and structure of the disrupting galaxy as well as the gravitational potential of its host. Streams around the Milky…
The Orbit and Origin of the Ultra-faint Dwarf Galaxy Segue 1
T. K. Fritz, M. Lokken, N. Kallivayalil +4
We present the first proper motion measurement for an ultra-faint dwarf spheroidal galaxy, Segue 1, using SDSS and LBC data as the first and second epochs separated by a baseline o…
A Widespread, Clumpy Starburst in the Isolated Ongoing Dwarf Galaxy Merger dm1647+21
G. C. Privon, S. Stierwalt, D. R. Patton +6
Interactions between pairs of isolated dwarf galaxies provide a critical window into low-mass hierarchical, gas-dominated galaxy assembly and the buildup of stellar mass in low-met…
Direct evidence of hierarchical assembly at low masses from isolated dwarf galaxy groups
Sabrina Stierwalt, Sandra E. Liss, Kelsey E. Johnson +5
The demographics of dwarf galaxy populations have long been in tension with predictions from the Cold Dark Matter (CDM) paradigm. If primordial density fluctuations were scale-free…