Bar Diagnostics in Edge-On Spiral Galaxies. III. N-Body Simulations of Disks

摘要: Present in over 45% of local spirals, boxy and peanut-shaped bulges are generally interpreted as edge-on bars may represent a key phase the evolution bulges. Aiming to test such claims, kinematic properties self-consistent 3D N-body simulations bar-unstable disks studied. Using Gauss-Hermite polynomials describe stellar kinematics, number characteristic bar signatures identified disks: 1) major-axis light profile with quasi-exponential central peak plateau at moderate radii (Freeman Type II profile); 2) ``double-hump\'\' rotation curve; 3) sometime flat velocity dispersion occasional minimum secondary peak; 4) an h3-V correlation projected length. All those features spatially correlated can easily be understood from orbital structure barred disks. They thus provide reliable easy-to-use tool identify bars. Interestingly, they all produced without dissipation increasingly realized common lending support bar-driven scenarios for bulge formation. So called ``figure-of-eight\'\' position-velocity diagrams never observed, expected realistic configurations. Although not uniquely related triaxiality, line-of-sight distributions high tail (i.e. correlation) appear particularly promising tracers The grow strength evolves vary little small inclination variations. Many used trace Comparisons observations encouraging view that simply thick viewed edge-on.