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

(2) Institut fur Astronomie Zurich; (3) Instituto de Astrofisica de Canarias); Enrico Maria Corsini (1); J. A. L. Aguerri (3) ((1) Universita` di Padova; Victor P. Debattista (2)

arxiv: astro-ph/0310879 · v1 · submitted 2003-10-30 · 🌌 astro-ph

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

Enrico Maria Corsini (1) , Victor P. Debattista (2) , J. A. L. Aguerri (3) ((1) Universita` di Padova , (2) Institut fur Astronomie Zurich , (3) Instituto de Astrofisica de Canarias) This is my paper

classification 🌌 astro-ph

keywords patternbarsgalaxynestedprimaryspeedsstellarbarred

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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.

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

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