[11.08] Non-Axisymmetric Features in the Disks of Isolated Galaxies in the SDSS

AAS 202nd Meeting, May 2003
Session 11 Galaxies, Cosmology and Higher Redshift Objects
Poster, Monday, May 26, 2003, 9:20am-6:30pm, West Exhibit Hall

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[11.08] Non-Axisymmetric Features in the Disks of Isolated Galaxies in the SDSS

O. Valenzuela, J. A. Holtzman (NMSU, Astronomy Department)

We study the radial Fourier Modes present in low inclination disks of isolated galaxies extracted from the SDSS. Particular attention is given to the frequency and distribution of amplitudes of the A1 mode which is a measure of lopsidedness. Preliminary results of the Fourier modes observed in high resolution N-body simulations of disk galaxies with a population of satellites drawn from a cosmological simulation are presented, along with a discussion of how the results might depend on the mass accretion history (MAH) of galaxies. We discuss the sources of lopsidedness in the simulations.

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

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