Recovery of transverse velocities of steadily rotating patterns in flat galaxies

Sridhar, S.; Sambhus, N.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1901

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DC Field	Value	Language
dc.contributor.author	Sridhar, S.	-
dc.contributor.author	Sambhus, N.	-
dc.date.accessioned	2007-01-23T06:17:59Z	-
dc.date.available	2007-01-23T06:17:59Z	-
dc.date.issued	2003-10	-
dc.identifier.citation	Monthly Notices of the Royal Astronomical Society, 2003, Vol.345, Issue 2, p539-544	en
dc.identifier.issn	0035-8711	-
dc.identifier.uri	http://hdl.handle.net/2289/1901	-
dc.description	Restricted Access. An open access version is available at NASA ADS (alternative location).	en
dc.description.abstract	The transverse velocities of steadily rotating, non-axisymmetric patterns in flat galaxies may be determined by a purely kinematic method, using two-dimensional maps of a tracer surface brightness and radial current density. The data maps could be viewed as the zeroth and first velocity moments of the line-of-sight velocity distribution, which is the natural output of integral-field spectrographs. Our method is closely related to the Tremaine-Weinberg method of estimating pattern speeds of steadily rotating patterns, when the tracer surface brightness satisfies a source-free continuity equation. We prove that, under identical assumptions concerning the pattern, two-dimensional maps may be used to recover not just one number (the pattern speed), but the full vector field of tracer flow in the disc plane. We illustrate the recovery process by applying it to simulated data and test its robustness by including the effects of noise.	en
dc.format.extent	8338 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Blackwell Publishing for the Royal Astronomical Society	en
dc.relation.uri	http://adsabs.harvard.edu/cgi-bin/bib_query?2003MNRAS.345..539S	en
dc.relation.uri	http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003MNRAS.345..539S&link_type=ARTICLE&db_key=AST	en
dc.rights	(2003) The Royal Astronomical Society	en
dc.title	Recovery of transverse velocities of steadily rotating patterns in flat galaxies	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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