When Should We Treat Galaxies as Isolated? (2009)
Hopkins, Philip F., Keres, Dusan, Ma, Chung-Pei, Quataert, Eliot
Traditionally, secular evolution is defined as evolution of systems where the internal growth of structure and instabilities dominates the growth via external drivers (e.g. accretion/mergers). Most...
Substructure depletion in the Milky Way halo by the disk (2009)
D'Onghia, Elena, Springel, Volker, Hernquist, Lars, Keres, Dusan
We employ numerical simulations and simple analytical estimates to argue that dark matter substructures orbiting in the inner regions of the Galaxy can be efficiently destroyed by disk shocking, a...
Mergers and Bulge Formation in Lambda-CDM: Which Mergers Matter? (2009)
Hopkins, Philip F., Bundy, Kevin, Croton, Darren, Hernquist, Lars, Keres, Dusan, Khochfar, Sadegh, ...
We use a suite of semi-empirical models to predict galaxy merger rates and contributions to bulge growth as functions of merger mass, redshift, and mass ratio. The models use empirical halo...
When Is Secular Evolution Important? (2009)
Hopkins, Philip F., Keres, Dusan, Ma, Chung-Pei, Quataert, Eliot
This abstract has been withdrawn.
Hopkins, Philip F., Somerville, Rachel S., Cox, Thomas J., Hernquist, Lars, Jogee, Shardha, Keres, Dusan, ...
Transformation of disks into spheroids via mergers is a well-accepted element of galaxy formation models. However, recent simulations have shown that bulge formation is suppressed in increasingly...
Keres, Dusan, Katz, Neal, Dave, Romeel, Fardal, Mark, Weinberg, David H.
We compare the properties of galaxies that form in a large volume cosmological simulation without strong feedback to observations at z=0. We confirm previous findings that models without strong...