2019ApJ...887...84Z

Query : 2019ApJ...887...84Z

2019ApJ...887...84Z - Astrophys. J., 887, 84-84 (2019/December-2)

Stellar chromospheric activity and age relation from open clusters in the LAMOST survey.

ZHANG J., ZHAO J., OSWALT T.D., FANG X., ZHAO G., LIANG X., YE X. and ZHONG J.

Abstract (from CDS):

We identify member stars of more than 90 open clusters in the LAMOST survey. With the method of Fang et al., the chromospheric activity (CA) indices, logRCaK^′^ for 1091 member stars in 82 open clusters and logRHα^′^ for 1118 member stars in 83 open clusters, are calculated. The relations between the average logRCaK^′^, logRHα^′^ in each open cluster and its age are investigated in different Teff and [Fe/H] ranges. We find that CA starts to decrease slowly from log t = 6.70 to log t = 8.50, and then decreases rapidly until log t = 9.53. The trend becomes clearer for cooler stars. The quadratic functions between log R' and log t with 4000 K < Teff < 5500 K are constructed, which can be used to roughly estimate ages of field stars with accuracy about 40% for logRCaK^′^ and 60% for logRHα^′^.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar activity - Stellar ages - Open star clusters

Simbad objects: 97

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Number of rows : 97
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Alessi 20 OpC 00 10 30.5 +58 45 18           ~ 55 0
2 [KPR2005] 6 OpC 01 47 22.1 +57 43 56           ~ 36 0
3 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
4 NGC 744 OpC 01 58 37.4 +55 29 04   8.38 7.9     ~ 82 0
5 Cl Stock 2 OpC 02 15 47.8 +59 33 12           ~ 155 0
6 Cl Trumpler 2 OpC 02 36 14.9 +55 54 32           ~ 124 0
7 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
8 NGC 1245 OpC 03 14 44.3 +47 14 06   9.16 8.4     ~ 171 0
9 [KPR2005] 10 OpC 03 26 46.1 +35 02 55           ~ 39 0
10 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
11 Cl King 6 OpC 03 27 58.1 +56 26 07           ~ 58 0
12 Cl Gulliver 25 OpC 03 28 16.7 +45 07 18           ~ 19 0
13 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
14 NGC 1342 OpC 03 31 37.4 +37 23 23   7.35 6.7     ~ 133 0
15 [KPR2005] 11 OpC 03 32 18.3 +44 51 57           ~ 48 0
16 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
17 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
18 NGC 1528 OpC 04 15 27.4 +51 13 21   6.83 6.4     ~ 133 0
19 NGC 1545 OpC 04 20 53.3 +50 11 32   7.2 6.2     ~ 121 0
20 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
21 NGC 1582 OpC 04 31 42.5 +43 42 38     7.0     ~ 52 0
22 NGC 1647 OpC 04 46 00.4 +19 05 06   6.82 6.4     ~ 189 0
23 Cl Alessi 2 OpC 04 46 32.2 +55 11 06           ~ 51 0
24 NGC 1662 OpC 04 48 48.5 +10 52 46   7.0 6.4     ~ 149 0
25 [KPR2005] 12 OpC 04 50 10.7 +41 42 34           ~ 37 0
26 NGC 1664 OpC 04 50 59.3 +43 39 48           ~ 143 0
27 Cl Alessi 96 OpC 05 02 07.1 +37 30 41           ~ 30 0
28 NGC 1708 OpC 05 03 33.0 +52 49 46           ~ 38 1
29 NGC 1750 OpC 05 03 49.8 +23 40 41           ~ 76 1
30 NGC 1758 OpC 05 04 42.8 +23 48 43           ~ 61 0
31 NGC 1817 OpC 05 12 33.9 +16 41 34           ~ 210 0
32 [KPR2005] 13 OpC 05 12 53.0 +44 21 18           ~ 44 0
33 Cl Dolidze 16 OpC 05 14 33.5 +32 43 55           ~ 31 0
34 Cl Gulliver 8 OpC 05 22 14.2 +33 47 26           ~ 20 0
35 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
36 NAME Barnard's Loop HII 05 27.5 -03 58           ~ 131 1
37 Cl Stock 8 OpC 05 27 54.1 +34 28 41           ~ 93 0
38 [KPR2005] 19 OpC 05 28 06.0 -01 56 32           ~ 75 0
39 NGC 1907 OpC 05 28 07.2 +35 19 33   8.87 8.2     ~ 140 2
40 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
41 M 38 OpC 05 28 40.0 +35 49 08   6.69 6.4     ~ 184 2
42 Cl Gulliver 6 OpC 05 33 01.0 -01 41 27           ~ 39 0
43 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
44 M 36 OpC 05 36 19.8 +34 08 02   6.09 6.0     ~ 206 2
45 Cl Gulliver 22 OpC 05 39 24 +26 22.1           ~ 11 0
46 Cl Stock 10 OpC 05 39 30.6 +37 49 20           ~ 59 0
47 Cl Czernik 23 OpC 05 50 06.2 +28 53 45           ~ 42 0
48 M 37 OpC 05 52 18.6 +32 32 36           ~ 436 0
49 NGC 2112 OpC 05 53 47.5 +00 24 18     9.1     ~ 109 0
50 NGC 2184 OpC 06 06 49.8 -02 02 22           ~ 49 1
51 [FSR2007] 0904 OpC 06 07 01.0 +19 00 52           ~ 30 0
52 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
53 [FSR2007] 0869 OpC 06 10 01.2 +24 33 37           ~ 30 0
54 [FSR2007] 0985 OpC 06 11 48.5 +07 01 06           ~ 18 0
55 NGC 2186 OpC 06 12 06.8 +05 27 07   9.20 8.7     ~ 62 0
56 NGC 2194 OpC 06 13 44.8 +12 48 48   9.03 8.5     ~ 90 1
57 Cl Ferrero 11 OpC 06 14 37.5 +00 38 41           ~ 28 0
58 [FSR2007] 0746 OpC 06 20 14.8 +46 43 12           ~ 46 0
59 NGC 2232 OpC 06 27 45.6 -04 44 26           ~ 212 0
60 [FSR2007] 0905 OpC 06 33 46.2 +22 20 10           ~ 26 0
61 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
62 NGC 2281 OpC 06 48 19.7 +41 02 35   6.05 5.4     ~ 182 0
63 NGC 2301 OpC 06 51 51.0 +00 28 35   6.30 6.0     ~ 173 0
64 [KPR2005] 29 OpC 06 54 25.9 -01 40 47           ~ 36 0
65 NGC 2355 OpC 07 16 59.1 +13 46 09     9.7     ~ 127 0
66 NGC 2420 OpC 07 38 24.6 +21 34 26   9.0 8.3     ~ 523 0
67 NAME Herschel 1 OpC 07 46 45.7 +00 09 45           ~ 50 0
68 NGC 2548 OpC 08 13 34.0 -05 43 11           ~ 227 0
69 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
70 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
71 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0
72 Cl Collinder 350 OpC 17 47 54.6 +01 31 22     6.1     ~ 73 0
73 Cl Melotte 186 OpC 18 02 20.8 +03 25 52           ~ 89 0
74 Cl Gulliver 20 OpC 18 14 43.9 +11 02 05           ~ 29 0
75 Cl Alessi 19 OpC 18 19 02.4 +12 20 50           ~ 45 0
76 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0
77 IC 4756 OpC 18 38 39.0 +05 26 14           ~ 274 0
78 NAME del Lyr Cluster OpC 18 54 11.2 +36 53 54   4.58 3.8     ~ 97 0
79 Cl Stock 1 OpC 19 36 35.9 +25 07 31     5.3     ~ 72 0
80 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
81 [KPR2005] 105 OpC 19 42 25.1 +27 22 42           ~ 48 0
82 [KPR2005] 108 OpC 19 53 21.3 +39 21 24           ~ 38 0
83 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0
84 Cl Gulliver 60 OpC 20 13 50.6 +29 41 33           ~ 22 0
85 RSG 5 OpC 20 14 13.9 +45 34 26           ~ 43 0
86 [KPR2005] 112 OpC 20 16 31.4 +52 03 32           ~ 44 0
87 Cl Dolidze 8 OpC 20 24 27.0 +42 18 06           ~ 26 0
88 Cl Roslund 6 OpC 20 29 00.4 +40 01 11           ~ 66 0
89 [KPR2005] 113 OpC 21 11 54.5 +38 44 19           ~ 49 0
90 NGC 7063 OpC 21 24 30.2 +36 29 45   7.32 7.0     ~ 99 0
91 NGC 7086 OpC 21 30 30.6 +51 35 37   9.25 8.4     ~ 93 1
92 NGC 7092 OpC 21 31 04.0 +48 17 47           ~ 245 0
93 [KPR2005] 114 OpC 21 40 11.1 +54 01 01           ~ 41 0
94 NGC 7243 OpC 22 15 16.0 +49 50 07   6.54 6.4     ~ 133 0
95 Cl Alessi 37 OpC 22 47 46.1 +46 25 16           ~ 50 0
96 RSG 7 OpC 22 56 51.0 +59 26 36           ~ 34 0
97 NGC 7789 OpC 23 57 19.4 +56 43 28   7.68 6.7     ~ 575 0

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