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THE ASTROPHYSICAL JOURNAL
ROBERT C. KENNICUTT, JR., EDITOR IN CHIEF
PUBLISHED BY THE UNIVERSITY OF CHICAGO PRESS
FOR THE AMERICAN ASTRONOMICAL SOCIETY
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Information about Images
"Metastudy of the Spiral Structure of Our Home Galaxy"
Jacques P. Vallée
ApJ 2002 Feb 10 - Vol. 566, No. 1, Part 1
Fig. 2 Model of logarithmic spiral arms, using the
results of this metastudy (p = 12 degrees inward, m = 4).
The logarithmic model was fitted to the Galactic longitude
values of the tangents to the observed spiral arms as
seen from the Sun. The Sun is shown by a circled dot,
with the SunGC distance taken as 7.2 kpc (y-axis). A
central bar extends radially from the GC to 3 kpc,
inclined clockwise at an angle of 20 degrees to the SunGC
line. Dots show concentric circles around the GC, at a
Galactic radius r = 1, 3, 5, 7, 9, 11, 13 kpc.