NGC 2950 is a nearby and undisturbed SB0 galaxy hosting two nested stellar bars. We used the Tremaine-Weinberg method to measure the pattern speed of the primary bar. This also permitted us to establish that the two nested bars are rotating with different pattern speeds (at better than 99% confidence level). In particular, the rotation frequency of the secondary bar is higher than that of the primary one.
Direct measurements of pattern speeds in double-barred SB0's
CORSINI, ENRICO MARIA;
2004
Abstract
NGC 2950 is a nearby and undisturbed SB0 galaxy hosting two nested stellar bars. We used the Tremaine-Weinberg method to measure the pattern speed of the primary bar. This also permitted us to establish that the two nested bars are rotating with different pattern speeds (at better than 99% confidence level). In particular, the rotation frequency of the secondary bar is higher than that of the primary one.File in questo prodotto:
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