Globular Clusters in M81

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M81 Spectroscopy - GC Rotation CurvesAll Objects Individually30 Degree Bins• V r (deprojected) = 108 ± 22 km/s; 45% of peak HI rotationamplitude (240 km/s)• Velocity Dispersion = 145 km/s (V/ = 0.74)• Rotation-corrected = 128 km/s
M81 Spectroscopy - GC Subpop. Rotation CurvesProjected RadiusMetallicity• Metal-rich (122 ± 18 km/s) and inner (133 ± 40 km/s) clustersrotate strongly• Metal-poor clusters show marginal signs of rotation (67 ± 38 km/s)
Page 1 and 2: Spectroscopy of M81 GlobularCluster
Page 3 and 4: Why study GCs in M81?• GC systems
Page 5: Metallicity Analysis Methodology•
Page 8 and 9: M81 Spectroscopy - Metallicity Hist
Page 12 and 13: M81 GC Metallicity GradientM81M31Mi
Page 14 and 15: Spiral Galaxy GCComparisons: Kinema
Page 16: Acknowledgments• Collaborator and

Globular Clusters in M81

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