Fig. 2.
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Comparison of phase spirals made of stars selected using different methods. Panel a: number density of stars in the Z–VZ phase plane in the 9.5 < R/ kpc < 10.4 range. Panel b: number density of stars in the Z–VZ phase plane in the 2200 < LZ/ kpc km s−1 < 2400 range. Panel a shows a less clearly defined phase spiral than the one in panel b.
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