The spiral structure of our Milky Way Galaxy | Astronomy & Astrophysics (A&A)

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Table 3:

The parameters of the polynomial logarithmic arm model.
ith arm	a_i	b_i	c_i	d_i	$\theta _{i}$
For distribution with R₀=8.5 kpc and $\Theta _0=220$ km s^-1					$(^{\circ})$
arm-1	1.376	-0.07792	0.04309	0	41
arm-2	7.330	-2.302	0.2849	-0.01059	304
arm-3	10.403	-3.526	0.4620	-0.01895	298
arm-4	1.978	-0.1181	0.02098	0	338
arm-5	2.297	0.09116	0.04273	0	35
Z	0.31
For distribution with R₀=8.0 kpc and $\Theta _0=220$ km s^-1					$(^{\circ})$
arm-1	1.302	-0.06629	0.04115	0	47
arm-2	7.5616	-2.448	0.3090	-0.01187	304
arm-3	9.9843	-3.417	0.4522	-0.01873	298
arm-4	1.5189	-0.00581	0.01286	0	338
arm-5	2.1949	0.1037	0.03317	0	35
Z	0.26
For distribution with R₀=8.4 kpc and $\Theta _0=254$ km s^-1					$(^{\circ})$
arm-1	1.3747	-0.0737	0.04318	0	41
arm-2	11.2880	-3.8678	0.4900	-0.01949	304
arm-3	10.2992	-3.519	0.4662	-0.01937	298
arm-4	1.5645	-0.005055	0.0132	0	338
arm-5	2.2973	0.004478	0.0750	0	55
Z	0.29

Source LaTeX | All tables | In the text

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