Journal article

GALAXY FORMATION IN HEAVILY OVERDENSE REGIONS AT z similar to 10: THE PREVALENCE OF DISKS IN MASSIVE HALOS

Emilio Romano-Diaz, Jun-Hwan Choi, Isaac Shlosman, Michele Trenti

The Astrophysical Journal Letters | IOP PUBLISHING LTD | Published : 2011

Abstract

Using a high-resolution cosmological numerical simulation, we have analyzed the evolution of galaxies at z ∼10 in a highly overdense region of the universe. These objects could represent the high-redshift galaxies recently observed by the Hubble's Wide Field Camera 3 and could as well be possible precursors of QSOs at z ∼6-7. To overcome the sampling and resolution problems in cosmological simulations of these rare regions, we have used the constrained realizations method. Our main result for z ∼10 shows the high-resolution central region of 3.5 h Mpc radius in comoving coordinates being completely dominated by disk galaxies in the total mass range of ≳ 10 h M . We have verified that t..

View full abstract

University of Melbourne Researchers

Grants

Awarded by Science and Technology Facilities Council


Awarded by Direct For Mathematical & Physical Scien


Funding Acknowledgements

We thank Volker Springel for providing us with the original version of GADGET-3 and Yehuda Hoffman for preparing the initial conditions using the constrained realizations. We are grateful to our colleagues, and especially to Kentaro Nagamine, for helpful discussions. I. S. acknowledges partial support by NASA and the NSF grants. M. T. acknowledges support by the University of Colorado ATP through grants from NASA and NSF. Simulations have been performed on the University of Kentucky DLX Cluster.