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

goto Full paper

goto View the references in ADS

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 - 2024 		#notes
1 Cl Alessi 20 OpC 00 10 22.3 +58 44 31           ~ 40 0
2 [KPR2005] 6 OpC 01 47 23 +57 43.3           ~ 31 0
3 NGC 752 OpC 01 56 53.5 +37 47 38           ~ 643 0
4 NGC 744 OpC 01 58 36.5 +55 28 23   8.38 7.9     ~ 75 0
5 Cl Stock 2 OpC 02 15 25.4 +59 31 19           ~ 128 0
6 Cl Trumpler 2 OpC 02 36 55.7 +55 54 18           ~ 112 0
7 NGC 1039 OpC 02 42 07.4 +42 43 19           ~ 431 0
8 NGC 1245 OpC 03 14 45.8 +47 14 06   9.16 8.4     ~ 151 0
9 Cl Melotte 20 OpC 03 26 28.1 +48 58 30           ~ 861 0
10 NAME Alessi Teutsch 9 OpC 03 27 28.8 +34 58 52           ~ 28 0
11 Cl King 6 OpC 03 27 55.7 +56 26 38           ~ 48 0
12 Cl Gulliver 25 OpC 03 28 03 +45 09.1           ~ 14 0
13 NGC 1333 OpC 03 29 11.3 +31 18 36           ~ 1454 1
14 NGC 1342 OpC 03 31 34.6 +37 22 48   7.35 6.7     ~ 123 0
15 [KPR2005] 11 OpC 03 32 13.4 +44 51 22           ~ 33 0
16 IC 348 OpC 03 44 31.7 +32 09 32           ~ 1395 1
17 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3438 0
18 NGC 1528 OpC 04 15 30.7 +51 13 05   6.83 6.4     ~ 120 0
19 NGC 1545 OpC 04 20 48.5 +50 13 16   7.2 6.2     ~ 111 0
20 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3083 0
21 NGC 1582 OpC 04 31 56.4 +43 43 05     7.0     ~ 42 0
22 NGC 1647 OpC 04 45 55.4 +19 04 44   6.82 6.4     ~ 169 0
23 Cl Alessi 2 OpC 04 46 24.5 +55 11 56           ~ 40 0
24 NGC 1662 OpC 04 48 47.5 +10 52 55   7.0 6.4     ~ 137 0
25 [KPR2005] 12 OpC 04 49 36.0 +41 44 38           ~ 28 0
26 NGC 1664 OpC 04 51 03.1 +43 40 34           ~ 128 0
27 RSG 1 OpC 05 02 01.9 +37 28 30           ~ 18 0
28 NGC 1708 OpC 05 03 29.0 +52 51 04           ~ 30 1
29 NGC 1750 OpC 05 03 42.2 +23 41 42           ~ 64 1
30 NGC 1758 OpC 05 04 42.0 +23 48 47           ~ 49 0
31 NGC 1817 OpC 05 12 33.4 +16 41 46           ~ 180 0
32 [KPR2005] 13 OpC 05 13 01.2 +44 25 01           ~ 37 0
33 Cl Dolidze 16 OpC 05 14 29.5 +32 42 25           ~ 24 0
34 Cl Gulliver 8 OpC 05 22 14 +33 47.5           ~ 13 0
35 NAME 25 Ori Group OpC 05 24 47.5 +01 39 18           ~ 160 1
36 NAME Barnard's Loop HII 05 27.5 -03 58           ~ 125 1
37 Cl Stock 8 OpC 05 27 49.4 +34 27 07           ~ 84 0
38 [KPR2005] 19 OpC 05 27 55.7 -01 59 13           ~ 52 0
39 NGC 1907 OpC 05 28 07.9 +35 19 48   8.87 8.2     ~ 128 2
40 M 38 OpC 05 28 40.1 +35 49 26   6.69 6.4     ~ 160 2
41 [KPR2005] 21 OpC 05 28 43.0 +03 31 37           ~ 57 0
42 Cl Gulliver 6 OpC 05 33 06.7 -01 39 07           ~ 25 0
43 Cl Collinder 69 OpC 05 35 10.1 +09 48 47     2.8     ~ 313 0
44 M 36 OpC 05 36 20.2 +34 08 06   6.09 6.0     ~ 187 2
45 Cl Stock 10 OpC 05 39 13.9 +37 51 00           ~ 46 0
46 Cl Gulliver 22 OpC 05 39 24 +26 22.1           ~ 9 0
47 Cl Czernik 23 OpC 05 50 06.0 +28 53 53           ~ 38 0
48 M 37 OpC 05 52 17.8 +32 32 42   6.19 5.6     ~ 402 2
49 NGC 2112 OpC 05 53 48.5 +00 24 11     9.1     ~ 91 0
50 NGC 2184 OpC 06 06 45.6 -02 00 00           ~ 36 1
51 [FSR2007] 0904 OpC 06 07 05.8 +19 01 16           ~ 24 0
52 NGC 2168 OpC 06 09 05.3 +24 20 10           ~ 559 0
53 [FSR2007] 0869 OpC 06 09 59.8 +24 34 01           ~ 26 0
54 [FSR2007] 0985 OpC 06 11 49 +07 01.2           ~ 14 0
55 NGC 2186 OpC 06 12 07.4 +05 27 11   9.20 8.7     ~ 57 0
56 NGC 2194 OpC 06 13 45.6 +12 48 47   9.03 8.5     ~ 84 1
57 Cl Ferrero 11 OpC 06 14 35.0 +00 38 13           ~ 19 0
58 [FSR2007] 0746 OpC 06 20 11.3 +46 42 36           ~ 35 0
59 NGC 2232 OpC 06 27 33.1 -04 44 56           ~ 185 0
60 [FSR2007] 0905 OpC 06 33 46 +22 18.7           ~ 19 0
61 NGC 2264 OpC 06 40 52.1 +09 52 37           ~ 1794 0
62 NGC 2281 OpC 06 48 21.8 +41 03 36   6.05 5.4     ~ 155 0
63 NGC 2301 OpC 06 51 46.3 +00 27 54   6.30 6.0     ~ 159 0
64 [KPR2005] 29 OpC 06 54 17 -01 40.2           ~ 29 0
65 NGC 2355 OpC 07 16 59.3 +13 46 19     9.7     ~ 107 0
66 NGC 2420 OpC 07 38 24.5 +21 34 30   9.0 8.3     ~ 477 0
67 NAME Herschel 1 OpC 07 46 41.8 +00 08 13           ~ 33 0
68 NGC 2548 OpC 08 13 38.9 -05 43 34           ~ 182 0
69 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1567 0
70 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2345 0
71 IC 4665 OpC 17 46 13.0 +05 36 54           ~ 372 0
72 Cl Collinder 350 OpC 17 48 04.3 +01 31 30     6.1     ~ 51 0
73 Cl Melotte 186 OpC 18 02 23.5 +03 15 36           ~ 79 0
74 Cl Gulliver 20 OpC 18 14 56.6 +11 04 55           ~ 20 0
75 Cl Alessi 19 OpC 18 18 57.8 +12 18 40           ~ 38 0
76 NGC 6633 OpC 18 27 22.8 +06 36 54           ~ 385 0
77 IC 4756 OpC 18 38 35.8 +05 26 06           ~ 241 0
78 NAME del Lyr Cluster OpC 18 54 16.3 +36 53 56   4.58 3.8     ~ 80 0
79 Cl Stock 1 OpC 19 36 35.0 +25 09 47     5.3     ~ 56 0
80 NGC 6811 OpC 19 37 21.6 +46 22 41   7.47 6.8     ~ 378 0
81 [KPR2005] 105 OpC 19 42 11.5 +27 21 58           ~ 35 0
82 [KPR2005] 108 OpC 19 53 13.4 +39 20 56           ~ 27 0
83 NGC 6866 OpC 20 03 55.9 +44 09 29   8.04 7.6     ~ 166 0
84 Cl Gulliver 60 OpC 20 13 45 +29 40.3           ~ 14 0
85 RSG 5 OpC 20 13 55.7 +45 34 26           ~ 20 0
86 NAME Alessi Teutsch 11 OpC 20 16 30.5 +52 03 04           ~ 34 0
87 Cl Dolidze 8 OpC 20 24 31.0 +42 18 00           ~ 19 0
88 Cl Roslund 6 OpC 20 28 44.4 +39 47 53           ~ 44 0
89 [KPR2005] 113 OpC 21 11 43.9 +38 38 17           ~ 34 0
90 NGC 7063 OpC 21 24 29.3 +36 30 25   7.32 7.0     ~ 88 0
91 NGC 7086 OpC 21 30 29.8 +51 35 35   9.25 8.4     ~ 82 1
92 NGC 7092 OpC 21 31 33.4 +48 14 49           ~ 223 0
93 [KPR2005] 114 OpC 21 39 58 +53 59.8           ~ 32 0
94 NGC 7243 OpC 22 15 09 +49 49.8   6.54 6.4     ~ 121 0
95 Cl Alessi 37 OpC 22 47 50.6 +46 20 31           ~ 35 0
96 RSG 7 OpC 22 56 45.6 +59 21 47           ~ 22 0
97 NGC 7789 OpC 23 57 20.2 +56 43 34   7.68 6.7     ~ 528 0

To bookmark this query, right click on this link: simbad:objects in 2019ApJ...887...84Z and select 'bookmark this link' or equivalent in the popup menu