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

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Table 2:

Tangential directions from observations (Bronfman 1992; Englmaier & Gerhard 1999) and the best fitting models.
Model	Scutum	Sagittarius	Carina	Crux	Norma	3-kpc
	$(^{\circ})$	$(^{\circ})$	$(^{\circ})$	$(^{\circ})$	$(^{\circ})$	$(^{\circ})$
observed mean value	25, 31	51	284	310	327	339
For distribution of tracers with R₀=8.5 kpc and $\Theta _0=220$ km s^-1
2-arm model	33	49		301	319	330
3-arm model	26, 36	58	284	313	325
4-arm model	25, 36	55	283	311	323
polynomial model	27, 33	53	284	309	329
For distribution of tracers with R₀=8.0 kpc and $\Theta _0=220$ km s^-1
2-arm model	33	49		303	320	330
3-arm model	26, 38	59	282	311	324
4-arm model	26, 37	55	284	310	322
polynomial model	27, 34	53	284	309	329
For distribution of tracers with R₀=8.4 kpc and $\Theta _0=254$ km s^-1
polynomial model	27, 33	53	284	309	329

Source LaTeX | All tables | In the text

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