Bar-driven Spiral Structure: Statistical Study of Nearby Galaxies in OSUBSGS and NIRS0S Samples

Details Bar-driven Spiral Structure: Statistical Study of Nearby Galaxies in OSUBSGS and NIRS0S Samples Bar-driven Spiral Structure: Statistical Study of Nearby Galaxies in OSUBSGS and NIRS0S Samples

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21460305s&link_type=abstract

American Astronomical Society, AAS Meeting #214, #603.05

Astronomy and Astrophysics

Astronomy

Scientific paper

We use the OSUBSGS (Ohio State University Bright Spiral Galaxy Survey, Eskridge et al. 2002) and NIRS0S (Near-IR S0 Survey, Laurikainen et al. 2005) data to study the connection of bars and outer spiral structures. Using near-IR images, the non-axisymmetric gravity perturbation associated with the bar is evaluated at various distances outside the bar, and compared to the local m=2 Fourier amplitude of spiral structure at the same distance. A statistically significant correlation between local bar perturbation and spiral amplitude is found up to about 1.5 bar lengths.
This work is supported by the Academy of Finland.

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