Journal
ASTRONOMICAL JOURNAL
Volume 125, Issue 3, Pages 1164-1176Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/346142
Keywords
galaxies : fundamental parameters; galaxies : kinematics and dynamics; galaxies : photometry
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We investigate the impact of nonaxisymmetric structure on estimates of galaxy inclinations and position angles. A new minimization technique is used to obtain estimates of inclination and position angle from a global fit to either photometric or kinematic data. We discuss possible systematic uncertainties that are much larger than statistical uncertainties. Our investigation reveals that systematic uncertainties associated with fitting photometric data dominate the formal statistical uncertainties. For our sample of inclined galaxies, we estimate that nonaxisymmetric features introduce inclination and position angle uncertainties of approximate to5degrees, on average. The magnitudes of these uncertainties weaken the arguments for intrinsically elliptical galaxy disks.
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