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Orientations of DM Halos in FIRE-2 Milky Way-mass Galaxies
Jay Baptista, Robyn Sanderson, Dan Huber +11
The shape and orientation of dark matter (DM) halos are sensitive to the micro-physics of the DM particle, yet in many mass models, the symmetry axes of the Milky Way's DM halo are…
The observable properties of galaxy accretion events in Milky Way-like galaxies in the FIRE-2 cosmological simulations
Danny Horta, Emily C. Cunningham, Robyn E. Sanderson +7
In the -Cold Dark Matter model of the Universe, galaxies form in part through accreting satellite systems. Previous work have built an understanding of the signatures of these p…
Building an Acceleration Ladder with Tidal Streams and Pulsar Timing
Peter Craig, Sukanya Chakrabarti, Robyn E. Sanderson +1
We analyze stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the potential of our Galaxy. Our…
Constraining the Tilt of the Milky Way's Dark Matter Halo with the Sagittarius Stream
Nondh Panithanpaisal, Robyn E. Sanderson, Arpit Arora +2
Recent studies have suggested that the Milky Way (MW)'s Dark Matter (DM) halo may be significantly tilted with respect to its central stellar disk, a feature that might be linked t…
Streams on FIRE: Populations of Detectable Stellar Streams in the Milky Way and FIRE
Nora Shipp, Nondh Panithanpaisal, Lina Necib +18
We present the first detailed study comparing the populations of stellar streams in cosmological simulations to observed Milky Way dwarf galaxy streams. In particular, we compare s…
Orbital dynamics and histories of satellite galaxies around Milky Way-mass galaxies in the FIRE simulations
Isaiah B. Santistevan, Andrew Wetzel, Erik Tollerud +2
The orbits of satellite galaxies encode rich information about their histories. We investigate the orbital dynamics and histories of satellite galaxies around Milky Way (MW)-mass h…