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

Bibcode
2003ApJ...599L..29C
DOI
10.1086/381080
Corsini, E. M.; Debattista, Victor P.; Aguerri, J. A. L.
Bibliographical reference

The Astrophysical Journal, Volume 599, Issue 1, pp. L29-L32.

Advertised on:
12
2003
Journal
The Astrophysical Journal
Number of authors
3
IAC number of authors
1
Citations
93
Refereed citations
68
Description
We present the 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. Based on observations made with the UK Jacobus Kapteyn Telescope and the Italian Telescopio Nazionale Galileo operated at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias by the Isaac Newton Group and the Istituto Nazionale di Astrofisica, respectively.
Type
Refereed
Galaxies
Photometry

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