Spiral arms and disc stability in the Andromeda galaxy

P. Tenjes; T. Tuvikene; A. Tamm; R. Kipper; E. Tempel

doi:10.1051/0004-6361/201629991

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Volume 600 (April 2017)

A&A, 600 (2017) A34

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Table 2

Velocity distribution parameters for the disc components of M 31.

Component	σ or c	Comments
	[km s^-1]

Main stellar disc	25–40	a function of R
Young stellar disc	15^a	a constant value
Cold gas disc	6	a constant value
Warm gas disc	7.3	a constant value

Notes.

^(a)

Calculations were also made for dispersions of 10 km s^-1 and 22.5 km s^-1.

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