Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Response of the integrals in the Tremaine-Weinberg method to multiple
  pattern speeds: a counter-rotating inner bar in NGC 2950?   When integrals in the standard Tremaine-Weinberg method are evaluated for the
case of a realistic model of a doubly barred galaxy, their modifications
introduced by the second rotating pattern are in accord with what can be
derived from a simple extension of that method, based on separation of tracer's
density. This extension yields a qualitative argument that discriminates
between prograde and retrograde inner bars. However, the estimate of the value
of inner bar's pattern speed requires further assumptions. When this extension
of the Tremaine-Weinberg method is applied to the recent observation of the
doubly barred galaxy NGC 2950, it indicates that the inner bar there is
counter-rotating, possibly with the pattern speed of -140 +/- 50 km/s/arcsec.
The occurrence of counter-rotating inner bars can constrain theories of galaxy
formation.

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The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph