2018PASP..130h4206S

Query : 2018PASP..130h4206S

2018PASP..130h4206S - Publ. Astron. Soc. Pac., 130, part no 8, 4206-84206 (2018/August-0)

Far ultraviolet photometry of F and G dwarfs in the Hyades, Coma Berenices, and NGC 2281 open clusters as obtained by GALEX.

SMITH G.H.

Abstract (from CDS):

A two-color diagram formed from GALEX FUV and Johnson BV photometry is presented for F and early G dwarfs in three open clusters: the Hyades, Coma Berenices, and NGC 2281. Denoted as (mFUV - B) versus B - V, the position of dwarf stars in such a diagram has been shown by previous work to vary with the level of chromospheric and coronal activity. The upper main sequences of the Hyades and Coma Ber clusters match quite well in this two-color diagram, consistent with their similar ages and metallicities, and effectively zero reddening. While the upper main sequence of NGC 2281 is also fairly well defined, there is some uncertainty in the reddening of this cluster, which hinders an attempt to compare it with the other two. The results of this work suggest that it may become feasible to define isochrones for Population I dwarf stars in a (mFUV - B) versus B - V diagram if a sufficient sample of stars of well-known ages can be used as calibrating sources. However, the utility of such a diagram for age-dating purposes will depend upon the additional availability of accurate reddening measurements.

Abstract Copyright: © 2018. The Astronomical Society of the Pacific. All rights reserved.

Journal keyword(s):

Simbad objects: 119

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Number of rows : 119
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 * 20 Ari PM* 02 15 46.0497447336 +25 46 58.578118716       5.5   F6III-IV 81 0
2 * 47 Ari PM* 02 58 05.2213070040 +20 40 07.442238720   6.230   5.6   F0V(e) 201 0
3 HD 20430 PM* 03 17 26.3862805584 +07 39 20.919521880   7.958 7.373 7.050 6.739 F8 143 0
4 HD 20439 PM* 03 17 32.7800971992 +07 41 24.556610724   8.376 7.747 7.402 7.085 G1 150 1
5 HD 24357 PM* 03 53 10.0461915456 +17 19 37.507270260   6.294 5.946 5.745 5.545 F4V 197 0
6 BD+19 641 SB* 04 00 39.5296216176 +20 22 49.525011912   9.33   8.2   G4V 81 0
7 HD 25202 PM* 04 00 48.7661952816 +18 11 38.405070420   6.212 5.865     F4V 105 0
8 HD 25825 PM* 04 06 16.1277225936 +15 41 53.233746900   8.416 7.811 7.484 7.169 G0V 222 0
9 HD 26015 PM* 04 07 41.9838821088 +15 09 46.041084720   6.45 6.07     F3V 180 0
10 HD 26345 PM* 04 10 42.3629157312 +18 25 23.714993208   7.005 6.576 6.329 6.095 F6V 168 0
11 * 45 Tau PM* 04 11 20.2822395072 +05 31 22.987999632   6.057 5.699 5.487 5.284 F4V 259 0
12 HD 26756 PM* 04 14 25.6501896480 +14 37 30.115628868   9.125 8.419 8.039 7.682 G2 231 0
13 V* V1309 Tau BY* 04 14 27.2546195976 +12 26 07.133100324   8.682 8.030 7.673 7.341 G0 192 0
14 HD 26736 BY* 04 14 32.3145372576 +23 34 29.798635044   8.711 8.047 7.691 7.356 G5V 245 0
15 HD 27130 SB* 04 17 38.9458465152 +16 56 52.187419068   9.075 8.315 8.79   G3 274 0
16 HD 27691 ** 04 22 44.17133 +15 03 21.9218 7.65 7.576 7.084 7.58   G0V 204 0
17 HD 27685 SB* 04 22 44.7200401380 +16 47 27.158550607 8.730 8.495 7.821 7.456 7.104 G2 168 0
18 * 63 Tau SB* 04 23 25.0640719200 +16 46 38.150834016   5.957 5.625 7.04 5.33 kA4VmF2/5IIIp 304 0
19 V* V895 Tau BY* 04 24 12.4710867960 +14 45 29.565731196   8.217 7.583 8.43   G0V(e) 237 0
20 HD 27835 PM* 04 24 12.7838536080 +16 22 44.148778356   8.808 8.203 7.870 7.560 G0V 135 0
21 HD 27859 BY* 04 24 28.3269703416 +16 53 10.202918748   8.382 7.790     G2V 245 0
22 HD 27935 SB* 04 24 43.2257850360 +04 41 59.816091804   9.685 8.934     G8V 91 0
23 V* V906 Tau BY* 04 26 24.6221111736 +16 51 12.069956916 8.86 8.69 8.05 7.51 7.16 G1V 234 0
24 HD 28099 BY* 04 26 40.1217122952 +16 44 48.885808416 8.98 8.78 8.12 7.56 7.23 G2+V 450 0
25 HD 28344 BY* 04 28 48.2984108040 +17 17 07.685984400 8.57 8.456 7.837 7.498 7.180 G2V 303 0
26 HD 28394 SB* 04 29 20.5589466330 +17 32 41.834829803   7.52 7.01 6.724 6.434 F8V 141 0
27 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
28 V* V997 Tau BY* 04 32 59.4512605248 +15 49 08.284758672   9.396 8.641 8.235 7.867 G8V 187 0
29 HD 28992 BY* 04 34 35.3100676992 +15 30 16.642906992   8.530 7.898 7.556 7.226 G1V 234 0
30 HD 29225 PM* 04 36 40.7173312344 +15 52 09.678087120   7.074 6.619 6.371 6.115 F6V 156 0
31 HD 29461 SB* 04 38 57.3211221216 +14 06 20.044120428   8.593 7.945 7.585 7.253 G5 155 0
32 HD 30210 PM* 04 46 01.7404096416 +11 42 20.112329592   5.566 5.346     Am 175 0
33 HD 30246 SB* 04 46 30.3856235280 +15 28 19.360077276   8.954 8.280 7.914 7.569 G5 166 1
34 HD 30311 PM* 04 46 45.5919796776 +09 01 02.460117720   7.799 7.228 6.906 6.590 F9.5V 108 0
35 HD 30355 PM* 04 47 37.5763702488 +18 15 31.483154520   9.258 8.522     G5V 97 0
36 HD 30589 PM* 04 49 32.1249486336 +15 53 19.474899432   8.324 7.739 7.412 7.111 F8 156 0
37 HD 30676 SB* 04 50 23.9234519856 +17 12 09.589313700   7.673 7.095 6.768 6.450 F8 123 0
38 HD 30712 SB* 04 50 33.8208486576 +15 05 00.378828492   8.453 7.712     G5 122 0
39 HD 30738 SB* 04 50 48.5436954768 +16 12 37.623200256   7.797 7.266     F8 153 0
40 HD 30809 PM* 04 51 23.2149431232 +15 26 00.473427888   8.418 7.886 7.591 7.302 F8 118 0
41 HD 30869A SB* 04 51 49.978609 +13 39 18.53294   6.81 6.36     ~ 179 0
42 HD 30869 ** 04 51 49.9931074392 +13 39 18.486491220   6.751 6.250 7.34 5.674 F7V 204 0
43 * 101 Tau PM* 04 59 44.3220286320 +15 55 00.236683308   7.220 6.747     F5V 155 0
44 HD 32347 PM* 05 03 07.6577118384 +13 43 50.412591984   9.372 8.596 8.182 7.810 K0 137 0
45 HD 240648 PM* 05 06 17.9892041544 +17 48 59.098915368   9.552 8.818     K0 93 0
46 NGC 2281 14 * 06 46 46 +41 15.6   13.51 12.96     ~ 3 0
47 NGC 2281 16 * 06 46 50.0780140525 +41 08 43.360554274   13.36 12.79     ~ 4 0
48 NGC 2281 19 * 06 47.0 +41 14   11.54 11.22     ~ 4 0
49 NGC 2281 20 * 06 47 04.8865754710 +41 05 38.786249679   11.59 11.26     ~ 18 0
50 NGC 2281 23 * 06 47 06.8808909741 +41 14 12.480073811   12.01 11.63     ~ 12 0
51 NGC 2281 28 * 06 47.3 +41 16   12.64 12.16     ~ 3 0
52 BD+41 1504 * 06 47 31.9016834664 +41 03 48.283909848   9.53 9.38     A2 14 0
53 NGC 2281 31 Pe* 06 47 33.1963292255 +40 54 12.854344273   11.0 10.675     A0VSrSi 16 0
54 NGC 2281 32 * 06 47 38.6047211721 +40 59 44.798012178 12.57 12.54 12.08 11.99   ~ 15 0
55 NGC 2281 34 * 06 47 43 +41 07.2   13.06 12.56     ~ 3 0
56 NGC 2281 36 * 06 47 45.5014358352 +40 57 41.428668516 12.39 12.32 11.92 11.86   ~ 16 0
57 BD+41 1506 * 06 47 51.0220769328 +40 58 35.755333248   10.37 10.10     ~ 8 0
58 NGC 2281 39 * 06 47 51.8221138621 +41 02 10.269035819 12.36 12.31 11.88 11.95   ~ 14 0
59 BD+41 1507 * 06 47 53.9973300696 +41 09 12.058100604   10.59 10.33     ~ 11 0
60 NGC 2281 42 * 06 47 56.6624153381 +40 58 45.325727930 13.30 13.29 12.74 12.68   ~ 13 0
61 BD+41 1508 * 06 47 58.8670556167 +41 10 37.653348878   10.39 10.21     ~ 25 0
62 NGC 2281 48 * 06 48.0 +41 13   12.14 11.73     ~ 4 0
63 NGC 2281 46 * 06 48 00.2225553072 +40 57 02.014244388   11.9 11.2     ~ 5 0
64 NGC 2281 51 * 06 48.1 +41 13   11.95 11.57     ~ 4 0
65 NGC 2281 52 * 06 48 10.0597194920 +40 59 10.039672488   11.1 10.8     kA7hF1mF0 18 0
66 BD+41 1510 * 06 48 14.7202896720 +41 10 42.245773500   11.2 11.0     kA4hA6mA8 8 0
67 NGC 2281 OpC 06 48 19.7 +41 02 35   6.05 5.4     ~ 182 0
68 NGC 2281 67 * 06 48 22 +40 50.6   12.69 12.16     ~ 3 0
69 HD 49040 * 06 48 22.1170459680 +40 57 45.089870184   8.94 8.82     B9pSr 47 0
70 BD+41 1515 * 06 48 26.1607102386 +41 23 40.287884642   10.8 10.6     ~ 14 0
71 BD+41 1519 * 06 48 35.4547277496 +41 05 26.418577560   10.41 10.3     ~ 15 0
72 BD+41 1520 * 06 48 37.5438404280 +41 06 21.079033956   10.19 10.15     ~ 17 0
73 NGC 2281 84 * 06 48 40 +40 51.7   13.17 12.62     ~ 3 0
74 HD 49098 * 06 48 40.8500255016 +41 03 59.387783796   8.80 8.59     A3III 29 0
75 NGC 2281 89 * 06 48 43.0689052680 +40 59 13.725896352 13.03 13.01 12.49 12.40   ~ 6 0
76 BD+41 1523 * 06 48 45.8353002267 +40 56 44.965741468   10.8 10.7     ~ 16 0
77 NGC 2281 95 * 06 49 04.5119891064 +41 00 06.985990260   10.81 10.6     ~ 8 0
78 NGC 2281 109 * 06 49 38 +41 00.7   12.55 12.08     ~ 4 0
79 NGC 2281 110 * 06 49 39 +41 06.1   13.28 12.71     ~ 3 0
80 V* MS Com gD* 12 06 00.8356637592 +23 12 16.430289480   7.79 7.48     F5 46 0
81 HD 105371 PM* 12 08 00.6533964240 +25 22 37.280812404   8.97 8.49     F6V 35 0
82 HD 105698 Em* 12 10 06.3322420800 +24 15 40.105051776   9.19 8.75     F6 26 0
83 HD 105808 SB* 12 10 47.4191936232 +02 19 54.435912276   10.21 9.15     K0(III) 7 0
84 HD 105863 * 12 11 07.3820881128 +25 59 24.629771616   10.18 9.55     F8.2 47 0
85 Cl Melotte 111 OpC 12 11 54.9 +25 16 36           ~ 520 0
86 V* GM Com dS* 12 12 24.8945127048 +27 22 48.353939724   8.44 8.1     F2-3V 129 0
87 HD 106678 SB* 12 16 02.5012455936 +28 02 55.246457364   8.67 8.3     F5 35 0
88 HD 106691 Em* 12 16 08.3755905912 +25 45 37.337623776   8.46 8.08     F3 113 0
89 HD 106887 PM* 12 17 30.5738663350 +28 56 13.890845846   5.87 5.70 7.06   kA3hA6mF1 84 0
90 HD 106946 Em* 12 17 50.9063952576 +25 34 16.838682780   8.19 7.87     F2Vs 110 0
91 HD 107053 * 12 18 29.0759321952 +32 44 56.028583824   6.901 6.668     A5V 52 0
92 HD 107067 SB* 12 18 36.1809470880 +23 07 12.274326840   9.17 8.70     F8 95 0
93 HD 107086 Em* 12 18 40.9098681264 +26 11 25.299167892   7.98 7.58     F5IV-V 47 0
94 HD 107132 V* 12 19 01.4794667088 +24 50 46.186912968   9.26 8.81     F7Vv 85 0
95 V* FM Com dS* 12 19 02.0250151224 +26 00 30.060577116   6.605 6.433     A6:IV-Vmv 165 0
96 * 8 Com * 12 19 19.1929880208 +23 02 04.821806040   6.416 6.220     kA7hF2mF3 147 0
97 HD 107214 Em* 12 19 28.3538047272 +24 17 03.210646596   9.61 9.03     G0V 88 0
98 * 10 Com Em* 12 19 50.6242729536 +28 27 51.675976548   6.812 6.617     kA5mA7(V) 129 0
99 HD 107399 Em* 12 20 45.5706181896 +25 45 57.104302932   9.62 9.00     G0 123 0
100 HD 107583 Em* 12 21 49.0266762216 +26 32 56.750515116   9.89 9.31     G0V 109 0
101 HD 107611 Em* 12 21 56.1616739640 +27 18 34.236329472   8.95 8.50     F5 124 0
102 HD 107685 * 12 22 24.7563796200 +22 27 50.908932288   8.98 8.54     F6 98 0
103 HD 108154 * 12 25 22.4975294904 +23 13 44.725774908   8.99 8.56     F5 100 0
104 BD+29 2290 * 12 27 48.2946577200 +28 11 39.891263784   10.40 9.6     G5.4 40 0
105 HD 108976 Em* 12 31 03.0979192032 +27 43 49.221073380   9.03 8.57     F6V 116 0
106 HD 109069 * 12 31 50.5548514464 +29 18 50.908640220   7.86 7.55     F0V 62 0
107 BD+36 2278 Em* 12 32 31.0724294328 +35 19 52.311815004   10.14 9.7     G5 57 0
108 HD 109346 Em* 12 33 52.3456759344 +26 51 39.417682608   10.04 9.68 9.4   F0 17 0
109 HD 109359 ** 12 33 59.417736 +26 50 13.34220   9.78 9.21 9.15   F9 31 0
110 HD 109483 Em* 12 34 54.2985164088 +27 27 20.207769624   9.60 9.0     G4.8 38 0
111 BD+27 2154 * 12 38 14.9445334752 +26 21 28.086937524 11.55 11.10 10.14 9.57 9.13 G7 16 0
112 HD 111154 SB* 12 47 06.7303883088 +22 37 00.582158676   8.96 8.40     G0V 53 0
113 HD 111878 Em* 12 52 11.6160381936 +25 22 24.579304968   9.35 8.83 8.6   F7 67 0
114 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
115 HD 113037 * 13 00 35.1763697736 +23 39 06.310536840   8.68 8.23     F5V 59 0
116 HD 114400 * 13 09 55.2637741464 +33 43 18.706075572   10.27 9.54     G0 31 0
117 BD+38 2436 * 13 21 11.1902844504 +37 48 48.764162592   9.60 9.10     M2 21 0
118 BD+26 2461 * 13 25 39.3687398352 +25 40 55.876015092   9.69 9.14     F8 38 0
119 NGC 2281 115 * ~ ~   12.5       ~ 2 0

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