On the Relevance of the Tremaine-weinberg Method Applied to Hα Velocity Field.pattern Speeds Determination in M100 (ngc 4321)
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چکیده
The relevance of the Tremaine-Weinberg (TW) method is tested to measure the bar, spiral and inner structure pattern speeds using a gaseous velocity field. The TW method is applied to
منابع مشابه
42 6 v 1 1 8 Ju n 20 04 Pattern Speeds of BIMA - SONG Galaxies with Molecule - Dominated ISMs Using the Tremaine - Weinberg Method
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The Tremaine-Weinberg method is a well-known model independent technique for measuring density wave pattern speeds in spiral galaxies. Here we show how it can be applied to the data cubes (maps of surface brightness and velocity) obtained in Hα emission using a Fabry-Perot spectrometer. One of the main difficulties, the discontinuity of the Hα emission, is resolved using the neighbouring stella...
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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...
متن کامل/ 06 02 52 0 v 1 2 3 Fe b 20 06 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...
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