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Table 1:

Non-axisymmetric Galactic model (Pichardo et al. 2003, 2004).
Parameter Value References
Bar half-length 3.1-3.5 kpc Gerhard (2002)
Bar axial ratios 10:3.8:2.6 Freudenreich (1998)
Bar scale lengths 1.7, 0.64, 0.44 kpc Freudenreich (1998)
Bar angle (respect to the Sun) $20^{\rm o}$ Gerhard (2002)
Bar mass $10^{10}\ {M}_\odot$ Debattista et al. (2002)
Bar pattern speed ( $\Omega_{\rm B}$) 30-60 km s-1 kpc-1 ($^\ast$)
Spiral Arms locus Bisymmetric (Logthm) Churchwell et al. (2009)
Spiral Arms pitch angle $15.5^{\rm o}$ Drimmel (2000)
Spiral Arms external limit 12 kpc Drimmel (2000)
Spiral Arms: exp. with scale-length 2.5 kpc Disk based
Spiral Arms force contrast $\sim$10% Patsis et al. (1991)
Spiral Arms pattern speed ( $\Omega_{\rm S}$) 20 km s-1 kpc-1 Martos et al. (2004)

References. ($^\ast$) Weiner & Sellwood (1999), Fux (1999), Ibata & Gilmore (1995), Englmaier & Gerhard (1999).

Source LaTeX | All tables | In the text

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