Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey

(2) Kapteyn; (3) NRC-HIA; (4) U. Maryland); David R. Andersen (3); Kyle B. Westfall (1); Marc A. W. Verheijen (2); Matthew A. Bershady (1); Rob A. Swaters (4) ((1) U. Wisconsin-Madison

arxiv: 0801.4912 · v1 · submitted 2008-01-31 · 🌌 astro-ph

Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey

Kyle B. Westfall (1) , Matthew A. Bershady (1) , Marc A. W. Verheijen (2) , David R. Andersen (3) , Rob A. Swaters (4) ((1) U. Wisconsin-Madison , (2) Kapteyn , (3) NRC-HIA , (4) U. Maryland) This is my paper

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keywords diskdisk-massellipsoidsigmastellarsurveyvelocityanalyze

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We analyze integral-field ionized gas and stellar line-of-sight kinematics in the context of determining the stellar velocity ellipsoid for spiral galaxies observed by the Disk-Mass Survey. Our new methodology enables us to measure, for the first time, a radial gradient in the ellipsoid ratio sigma_z / sigma_R. Random errors in this decomposition are 15% at two disk scale-lengths.

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Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey

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