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Shepherding Tidal Debris with the Galactic Bar: The Ophiuchus Stream
Kohei Hattori, Denis Erkal, Jason L. Sanders
The dynamics of stellar streams in rotating barred potentials is explained for the first time. Naturally, neighbouring stream stars reach pericentre at slightly different times. In…
Dynamics of stream-subhalo interactions
Jason L. Sanders, Jo Bovy, Denis Erkal
We develop a formalism for modelling the impact of dark matter subhaloes on cold thin streams. Our formalism models the formation of a gap in a stream in angle-frequency space and…
A 10 kpc stellar substructure at the edge of the Large Magellanic Cloud: perturbed outer disk or evidence for tidal stripping?
Dougal Mackey, Sergey E. Koposov, Denis Erkal +3
We report the discovery of a substantial stellar overdensity in the periphery of the Large Magellanic Cloud (LMC), found using public imaging from the first year of the Dark Energy…
Properties of Dark Subhaloes from Gaps in Tidal Streams
Denis Erkal, Vasily Belokurov
Cold or Warm, the Dark Matter substructure spectrum must extend to objects with masses as low as , according to the most recent Lyman- measurements. Around a Milky…
A timing constraint on the (total) mass of the Large Magellanic Cloud
Jorge Peñarrubia, Facundo A. Gómez, Gurtina Besla +2
This paper explores the effect of the LMC on the mass estimates obtained from the timing argument. We show that accounting for the presence of the LMC systematically lowers the Loc…