First evidence of multiple populations along the AGB from Strömgren photometry

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Volume 603 (July 2017)

A&A, 603 (2017) A37

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Table A.1

AGB and RGB star selection rules.

GC	HB y	m₁	CMD	RGB	AGB

M 3	15.5	− 0.1 <m₁< 0.2 or	(v−y) vs. y	Δ(v−y) > 0.06	Δ(v−y) ^a < 0.06
		1.075(b−y)−0.5 <m₁< 1.075(b−y)−0.3

M 92	15	m₁> 0	(v−y) vs. y	Δ(v−y) ^b < 0.03	1 < (v−y) < 1.45, c_y> −0.1
			and c_y vs. b	Δy ^b < 0.2	Δ(v−y)^a< 0.03 and Δy^a< 0.15

NGC 362	15	0.175(u−y)−0.3 <m₁< 0.175(u−y)−0.19	(v−y) vs. y	Δ(v−y) < 0.04 and Δy< 0.18 and	− 2(v−y) + 16.9 <y< −2(v−y) + 17.2
				− 2(v−y) + 17.2 <y and (v−y) < 2.5	1.2 < (v−y) < 1.8

NGC 1851	15.9	0.175(u−y)−0.3 <m₁< 0.175(u−y)−0.175	(v−y) vs. y	Δ(v−y) < 0.04 and Δy< 0.18	7.06c_y + 17.0 <b
			and c_y vs. b	and (v−y) < 1.7	and − 3(v−y) + 19.6 <y

Notes.

^(a)

Distance to a fiducial going through the by-eye identified AGB in the CMD.

^(b)

Distance to a fiducial going through the by-eye identified RGB in the CMD.

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