Helium in first and second-generation stars in globular clusters from spectroscopy of red giants

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Table 1:

Difference in colour and metallicity between different populations in the 19 GCs.
NGC	[Fe/H]	$(V-K)_{\rm P}$			$(V-K)_{\rm I} -(V-K)_{\rm P}$			[Fe/H] $_{\rm P}$		[Fe/H] $_{\rm I}$		$\Delta$ [Fe/H]
	Pap VIII	Stars	mean	rms	stars	mean	rms	mean	rms	mean	rms
NGC 104	-0.768	24	0.033	0.061	52	-0.010	0.038	-0.760	0.041	-0.748	0.039	0.012
NGC 288	-1.305	20	-0.004	0.053	41	-0.013	0.048	-1.230	0.046	-1.223	0.052	0.007
NGC 1904	-1.579	17	-0.010	0.050	16	-0.008	0.063	-1.549	0.042	-1.536	0.042	0.013
NGC 2808	-1.151	20	0.001	0.059	11	-0.046	0.027	-1.167	0.033	-1.097	0.056	0.070
NGC 3201	-1.512	31	-0.017	0.063	54	0.003	0.063	-1.468	0.061	-1.494	0.053	-0.026
NGC 4590	-2.265	18	-0.014	0.043	28	0.002	0.040	-2.215	0.065	-2.236	0.052	-0.021
NGC 5904	-1.340	21	0.002	0.046	53	-0.006	0.043	-1.342	0.042	-1.343	0.034	-0.001
NGC 6121	-1.168	23	0.179	0.083	53	0.008	0.070	-1.310	0.049	-1.302	0.045	0.008
NGC 6171	-1.033	10	-0.013	0.058	16	0.010	0.087	-1.072	0.053	-1.054	0.072	0.018
NGC 6218	-1.330	18	0.000	0.047	43	-0.024	0.053	-1.302	0.028	-1.302	0.041	0.000
NGC 6254	-1.575	31	-0.011	0.058	48	-0.009	0.064	-1.550	0.072	-1.552	0.057	-0.002
NGC 6388	-0.441	12	0.007	0.097	6	-0.035	0.062	-0.427	0.115	-0.389	0.061	0.038
NGC 6397	-1.988									-2.006	0.067
NGC 6441	-0.430	3	-0.062	0.084	3	0.047	0.043	-0.284		-0.311		-0.027
NGC 6752	-1.555	21	-0.037	0.053	57	0.027	0.055	-1.549	0.055	-1.563	0.053	-0.014
NGC 6809	-1.934	16	-0.035	0.062	55	0.017	0.053	-1.946	0.042	-1.955	0.057	-0.009
NGC 6838	-0.832	11	-0.001	0.042	19	-0.005	0.041	-0.803	0.044	-0.808	0.038	-0.005
NGC 7078	-2.320	12	-0.029	0.032	18	0.003	0.069	-2.312	0.066	-2.320	0.050	-0.008
NGC 7099	-2.344	11	-0.039	0.048	13	0.023	0.059	-2.313	0.046	-2.340	0.053	-0.027

Source LaTeX | All tables | In the text

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