ner_tags: O O O B-Person I-Person O B-Person I-Person O O O O O O O O O B-Person O O O B-Organization O B-Grant B-Person O O O O B-Organization I-Organization I-Organization I-Organization O O B-Organization I-Organization I-Organization B-Person O O O O B-Organization O B-Grant O O O B-Grant I-Grant I-Grant O O B-Organization I-Organization I-Organization O O O O O B-ComputingFacility I-ComputingFacility I-ComputingFacility I-ComputingFacility B-ComputingFacility O O B-Organization I-Organization I-Organization I-Organization I-Organization O O B-Grant I-Grant I-Grant
tokens: Acknowledgments We thank Dmitri Uzdensky and Mitch Begelman for fruitful discussions and for comments on the manuscript. VZ acknowledges support from NSF grant AST-1411879. JW is supported by the Wisconsin Alumni Research Foundation at the University of Wisconsin-Madison. SB is partly supported by NSF grant AGS-1261659, and by the Vilas Associates Award from the University of Wisconsin-Madison. Simulations were performed at the Texas Advanced Computing Center (TACC) at the University of Texas at Austin under the NSF-Teragrid Project TG-PHY110016.