J-PLUS: The fraction of calcium white dwarfs along the cooling sequence

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Table 2

Fraction of calcium white dwarfs measured at different effective temperature intervals.

		J-PLUS		40 pc spectroscopic sample				SDSS spectroscopy

$T_{eff}^{\min}$ $T_{{\rm{eff}}}^{\min }$	$T_{eff}^{\max}$ $T_{{\rm{eff}}}^{\max }$	〈T_eff〉	f_Ca	〈T_eff〉	f_Ca	f_Ca	f_Ca	S /N_min	〈T_eff〉	f_Ca
(kK)	(kK)	(kK)		(kK)	Tier 1,2,3	Tier 1,2	Tier 1		(kK)
5.5	8	6.8	0.14 ± 0.02	6.5	0.13 ± 0.02	0.12 ± 0.02	0.10 ± 0.02	15	7.1	0.085 ± 0.011
8	10	9.1	0.08 ± 0.02	9.0	0.13 ± 0.03	${0.07}_{- 0.02}^{+ 0.03}$ $0.07_{ - 0.02}^{ + 0.03}$	${0.07}_{- 0.02}^{+ 0.03}$ $0.07_{ - 0.02}^{ + 0.03}$	14	9.0	0.074 ± 0.008
10	12	11.0	0.04 ± 0.01	10.9	${0.07}_{- 0.03}^{+ 0.04}$ $0.07_{ - 0.03}^{ + 0.04}$	${0.05}_{- 0.03}^{+ 0.04}$ $0.05_{ - 0.03}^{ + 0.04}$	${0.06}_{- 0.03}^{+ 0.04}$ $0.06_{ - 0.03}^{ + 0.04}$	13	11.0	0.068 ± 0.009
12	15	13.3	0.01 ± 0.01	14.4	${0.05}_{- 0.02}^{+ 0.03}$ $0.05_{ - 0.02}^{ + 0.03}$	${0.01}_{- 0.01}^{+ 0.02}$ $0.01_{ - 0.01}^{ + 0.02}$	${0.01}_{- 0.01}^{+ 0.02}$ $0.01_{ - 0.01}^{ + 0.02}$	10	13.5	0.049 ± 0.005
15	18	16.3	0.01 ± 0.01	16.1	${0.06}_{- 0.03}^{+ 0.05}$ $0.06_{ - 0.03}^{ + 0.05}$	${0.02}_{- 0.02}^{+ 0.04}$ $0.02_{ - 0.02}^{ + 0.04}$	${0.02}_{- 0.02}^{+ 0.04}$ $0.02_{ - 0.02}^{ + 0.04}$	6	16.4	0.020 ± 0.003
18	30	21.3	0.01 ± 0.01	21.2	${0.05}_{- 0.03}^{+ 0.05}$ $0.05_{ - 0.03}^{ + 0.05}$	${0.02}_{- 0.02}^{+ 0.03}$ $0.02_{ - 0.02}^{ + 0.03}$	${0.02}_{- 0.02}^{+ 0.04}$ $0.02_{ - 0.02}^{ + 0.04}$	5	22.2	0.005 ± 0.001

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