(Arm feature) Details on Acronym: NAME Arm NAME ArmWrite:<<NAME Arm W N in M 31>>
Object:Arm (SIMBAD class: PartofG = Part of a Galaxy)
Note:In the format 'W N' stands for: 'N 1' to 'N 7' and 'S 1' to 'S 7' where N and S refer to arms on the North following and South preceding sides of the major axis. These arms were also studied by Baade in 1963 (Evolution of stars and galaxies).
in source:M 31 = NGC 224Ref:=1964ApJ...139.1045A
Astrophys. J., 139, 1045-1057 (1964)
Spiral structure in M 31.
o<NAME Arm W N in M 31> (Nos N 1 to N 7) and (Nos S 1 to S 7)
Originof the Acronym: L = Found in the literature