Assumed MW parameters.
|5.6 × 1010 M⊙||mass of disc|
|M bulge||1.3 to 1.8 × 1010 M⊙||mass of bulge|
|3.5 kpc||disc scale length|
|8.5 kpc||Solar radius|
|220 km s-1||circular velocity near Sun|
|50 M⊙ pc-2||disc surface density near Sun|
Notes. Assumed parameters of today’s MW disc, applied as starting points for the down-scaling of the disc to its younger version, 10 Gyr ago.
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