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[119.03] The DEEP2 Redshift Survey: Probing the Dark Matter Density Profile at z~1

C.F. Conroy (The DEEP2 Team), DEEP2 Redshift Survey Team

Historically, probing the edges of dark matter halos has been very difficult due to inadequate tracers of the underlying mass distribution. However, using a statistically significant sample of satellites, one can measure the velocity profile of a `typical' isolated galaxy halo well beyond 100kpc. With such an extended profile, it is possible to then confirm or deny various cosmological models such as NFW or MOND. Recently, evidence has been found in SDSS that the outer edges of halos do in fact obey NFW type dynamics. Here we present a similar analysis with initial data from the DEEP2 Redshift Survey. We investigate the shape of halo profiles at z=1 using approximately 130 available satellites. We also look for evidence of relations between host galaxy luminosity and relative satellite velocity (a quasi Tully-Fisher relation), and relative satellite velocity and host galaxy rotation speed.

The author(s) of this abstract have provided an email address for comments about the abstract: cconroy@astron.berkeley.edu

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.