Direct Confirmation of Two Pattern Speeds in the Double Barred Galaxy NGC 2950

Preprint

30 October 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0310879

Abstract

We present surface photometry and stellar kinematics of NGC 2950, which is a nearby and undisturbed SB0 galaxy hosting two nested stellar bars. We use the Tremaine-Weinberg method to measure the pattern speed of the primary bar. This also permits us to establish directly and for the first time that the two nested bars are rotating with different pattern speeds, and in particular that the rotation frequency of the secondary bar is higher than that of the primary one.

Keywords

DIRECT CONFIRMATION
PATTERN SPEEDS
BARRED GALAXY
DOUBLE BARRED
TWO PATTERN
TWO NESTED
GALAXY
BARS
NGC

All Related Versions

Version 1, 2003-10-30, ArXiv
Published version: The Astrophysical Journal, 599 (1), L29.

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