1998AJ....116.1810E

Query : 1998AJ....116.1810E

1998AJ....116.1810E - Astron. J., 116, 1810-1815 (1998/October-0)

The Pleiades and α Persei clusters.

EGGEN O.J.

Abstract (from CDS):

The upper-main-sequence members of the Pleiades and α Persei clusters, considered as members of the Local Association, yield mean parallaxes that are only 4% larger than the mean values from Hipparcos observations. The (log Teff, MV) diagram reveals that in the temperature range from 6000 to 8000 K, the Hyades and α Persei main-sequence members are nearly identical and several tenths of a magnitude brighter than similar stars on the Pleiades main sequence. The departure of the Pleiades main sequence cannot be traced to either age or heavy-element abundance differences in the range thought to apply to these clusters. A 50% increase in the helium abundance of Pleiades over Hyades stars could account for the luminosity difference. Alternative explanations are that the Pleiades cluster is rejected from supercluster membership and/or that the Hipparcos parallax results for the Pleiades are in error by some 10%.

Abstract Copyright: ∼

Journal keyword(s): Astrometry - Galaxy: Open Clusters and Associations: Individual: Name: Pleiades - Galaxy: Open Clusters and Associations: Individual: Name: α Persei

CDS comments: Table 4 : BD +46 816 misprint for BD +47 816.

Simbad objects: 130

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Number of rows : 130
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 HD 10863 PM* 01 46 01.0580461824 -27 20 55.792093776   6.729 6.385     F2V 52 0
2 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 557 0
3 BD+49 859 RG* 03 09 19.9673093232 +49 42 11.585929428   10.89 9.54     G7 12 0
4 BD+49 863 * 03 10 41.7669149064 +50 31 32.068739676   11.79 11.09     G4 37 0
5 HD 19624 * 03 11 42.9019999464 +52 09 48.464907300   6.90 6.88     B5 50 0
6 BD+49 868 * 03 11 49.9911787752 +50 22 46.759558728   10.17 9.69     F5V 70 0
7 BD+49 870 SB* 03 12 03.0306402672 +50 23 31.100365536   11.2 10.7     F8IV-V 20 0
8 HD 19954 * 03 14 16.6034471424 +48 34 40.239730956   9.53 9.22     A3 29 0
9 BD+48 871 * 03 15 23.5628618954 +49 26 25.015737214   10.56 10.04     F7V 51 0
10 HD 20122 * 03 16 13.6311937704 +51 25 43.877565228   9.68 9.27     F2V 22 0
11 BD+49 889 * 03 16 23.1604912236 +49 37 33.342697892   10.520 10.060 9.971   F5V 44 0
12 Cl Melotte 20 350 * 03 17 36.9406448668 +48 50 08.506254302   11.87 11.20 10.99   G3 52 1
13 BD+49 896 * 03 18 01.7458695480 +49 38 38.832622296   10.11 9.68     F4V 54 0
14 BD+49 897 * 03 18 05.2646061060 +49 54 21.820615047   10.43 9.98     F6V 63 0
15 * 29 Per Pu* 03 18 37.7416927200 +50 13 19.834697676 6.232 5.074 5.157     B3V 167 0
16 * 31 Per Pu* 03 19 07.6392847536 +50 05 41.889763428 4.44 4.962 5.032     B5V 146 0
17 BD+47 808 Em* 03 21 30.2356009776 +48 29 37.884541488   9.50 9.12     F1IVn 60 0
18 BD+48 892 Em* 03 21 40.2205118829 +49 07 12.823484441   9.92 9.60     F3IV-V 75 0
19 V* V459 Per dS* 03 21 58.6188233040 +49 12 53.516136816   9.45 9.18     F0IV 74 0
20 HD 20714 * 03 22 26.2840076832 +51 39 39.531168540   9.40 9.13     A7Vn 43 0
21 HD 20809 * 03 23 13.1970566400 +49 12 47.774817972   5.23 5.30     B5V 150 0
22 BD-10 666 * 03 23 36.5731159776 -10 12 38.872399752   10.68 10.06     G0 17 0
23 HD 20863 * 03 23 47.3303869752 +48 36 15.892890228   7.00 6.99     B9V 73 0
24 BD+49 914 Y*O 03 23 55.0858500288 +50 18 24.119496540   10.50 9.99     F5V 36 0
25 V* V461 Per dS* 03 24 19.1824987152 +49 13 16.531786560   9.34 9.00     A8V 99 0
26 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
27 BD+49 918 * 03 24 25.0354539341 +50 19 34.655044572   9.67 9.28     F0V 45 0
28 BD+47 816 * 03 24 47.0905858896 +48 24 41.985492660   10.40 9.94     F4V 62 0
29 BD+46 745 * 03 24 55.1188078242 +47 24 54.066628987   10.15 9.77     F4V 60 0
30 HD 20969 SB* 03 25 04.3622041464 +49 47 43.448313120   9.46 9.15     A8V 64 0
31 HD 21005 * 03 25 20.7224647872 +49 18 58.203384876   8.61 8.48     A5Vn 56 0
32 BD+47 819 * 03 25 29.4742567080 +47 58 02.343054936   9.63 9.26     A8V 50 0
33 HD 21071 Pu* 03 25 57.3820460520 +49 07 14.729885580 5.53 6.02 6.09     B7V 180 0
34 BD+47 825 * 03 26 39.1809914880 +47 52 56.306390700   10.19 9.76     F2Vn 42 0
35 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
36 BD+48 916 * 03 27 03.2522081163 +48 47 13.347153176   10.5 10.0     F6V 50 0
37 HD 21181 * 03 27 05.1680623464 +48 12 19.828626120   6.817 6.842     B8.5Vn 87 0
38 HD 21278 SB* 03 28 03.0707602272 +49 03 46.325803896   4.89 4.97     B5V 220 0
39 BD+48 923 * 03 28 31.5059240688 +48 56 27.296722356   10.3 9.7     F4V 64 0
40 Cl Melotte 20 833 * 03 29 08.2703373993 +48 10 50.831723485   10.61 10.1     F6 45 0
41 HD 21455 Be* 03 29 26.2864669176 +46 56 16.318187592   6.305 6.217 7.27   B7Vne 120 0
42 HD 21527 * 03 30 19.3259640120 +48 29 57.595018020   9.08 8.89     A7IV 64 0
43 V* V465 Per dS* 03 30 33.9885847800 +47 37 41.479403952   9.06 8.83     A6Vn 73 0
44 HD 21551 Pu* 03 30 36.9521337744 +48 06 12.973490460 5.46 5.78 5.82     B8V 138 0
45 Cl Melotte 20 917 Y*O 03 30 47.6112480597 +47 53 21.489257302   11.59 10.93     F4 48 0
46 HD 21600 * 03 31 14.6807619624 +49 42 22.469651064   8.79 8.64     A6Vn 62 0
47 BD+49 957 * 03 31 44.5629035481 +49 32 12.491955770   9.97 9.437     F3V 34 0
48 HD 21672 * 03 31 53.9456792880 +48 44 06.519249276   6.61 6.63     B8V 87 0
49 BD+48 944 * 03 31 55.8072950208 +48 35 01.691136276   8.37 8.19     A4V 52 0
50 BD+49 958 Pu* 03 31 58.7245723272 +49 52 12.597869892   9.58 9.25     F1V 71 0
51 HD 21699 Pu* 03 32 08.6084197968 +48 01 24.528548676 4.81 5.355 5.461     B9III 220 0
52 Cl Melotte 20 1005 * 03 32 42.5858851776 +48 08 20.174125092   9.97 9.38 9.61   F3V 34 0
53 HD 22136 V* 03 35 58.4902578816 +47 05 27.699737244   6.842 6.873     B8V 108 0
54 BD+46 780 * 03 37 17.5763973816 +47 20 53.692392084   9.56 9.18     F3IV 28 0
55 HD 22637 SB* 03 39 13.2020754912 +21 50 35.688616584   7.34 7.26     A0V 56 0
56 HD 23061 * 03 42 55.1141189191 +24 29 35.049617418 9.96 9.90 9.46 9.01 8.90 F5V 114 0
57 HD 23157 ** 03 43 41.5325750160 +23 38 56.977320660   8.25 7.95     A5V 99 0
58 HD 23158 SB* 03 43 42.8773509420 +23 35 41.208537362   10.04 9.58     F5V 88 0
59 V* V624 Tau dS* 03 43 43.2412431936 +24 22 28.445642868   8.49 8.22     A7III 140 0
60 HD 23195 SB* 03 43 58.8034552580 +23 52 57.813467374   10.19 9.55     F5V 108 0
61 Cl Melotte 22 227 * 03 43 59.2714323528 +24 33 02.373149628   16.0   16.07   ~ 1 0
62 V* V1187 Tau dS* 03 44 00.2690335032 +24 33 25.193571588   8.28 8.07     A4IV 156 0
63 HD 23247 PM* 03 44 23.5411594200 +24 07 57.471196908   9.564 9.111 9.23   F2V 95 0
64 HD 23246 PM* 03 44 25.7165880744 +24 23 40.975909332   8.44 8.18     A8V 94 0
65 Cl Melotte 22 420 * 03 44.7 +24 18   16.1       ~ 3 0
66 * 16 Tau V* 03 44 48.2149362048 +24 17 22.083331452 5.09 5.42 5.46 5.42 5.47 B7V 272 0
67 HD 23289 * 03 44 51.2354703456 +23 16 08.116761576   9.33 9.01   8.37 F3V 135 0
68 * 17 Tau Be* 03 44 52.5370897890 +24 06 48.016260072 3.19 3.59 3.70 3.71 3.80 B6IIIe 415 1
69 HD 23326 PM* 03 45 05.2834818672 +23 42 09.619748244 9.632 9.34 8.99   8.49 F3V 128 0
70 HD 23325 Pe* 03 45 06.5388153048 +24 15 48.650236236   8.96 8.70   8.16 kA6hA9mF1(IV) 112 0
71 * 18 Tau PM* 03 45 09.7401340368 +24 50 21.343198416 5.21 5.57 5.64 5.61 5.68 B8V 293 0
72 * q Tau SB* 03 45 12.4999931614 +24 28 02.185543730 3.73 4.19 4.30 4.30 4.40 B6IV 288 0
73 HD 23351 SB* 03 45 20.8608183282 +24 55 19.454554726   9.46 9.03   8.43 F3V 103 0
74 Cl Melotte 22 620 * 03 45.4 +24 24   15.6       ~ 3 0
75 HD 23352 * 03 45 24.1269375603 +24 53 09.534285718   10.3 9.8   9.05 F5V 104 0
76 HD 23361 PM* 03 45 26.1389258592 +24 02 06.584058672   8.24 8.02   7.78 A3V 94 0
77 HD 23336 PM* 03 45 27.5401636560 +28 40 07.327761420   7.53 7.40     A2 35 0
78 HD 23375 dS* 03 45 34.4631249960 +24 27 47.922382692   8.94 8.58   8.33 F0V 113 0
79 HD 23402 * 03 45 39.8976459528 +22 41 40.061069880 8.120 8.010 7.830     A0 51 0
80 HD 23129 PM* 03 45 44.5107564288 +58 51 20.919404736 9.83 8.22 7.76     F5V 26 0
81 HD 23410 PM* 03 45 48.8151076872 +23 08 49.727194548   6.925 6.909   6.78 A0Va 100 0
82 * 20 Tau PM* 03 45 49.6081548365 +24 22 03.877565838 3.40 3.80 3.87 3.85 3.90 B7III 451 1
83 * 21 Tau PM* 03 45 54.4764507648 +24 33 16.235698248 5.49 5.72 5.76 5.71 5.74 B8V 234 0
84 HD 23430 * 03 45 59.1396677304 +25 23 54.931179624   8.25 8.05     A0 81 0
85 HD 23479 Er* 03 46 16.0035787584 +24 11 23.722659996   8.91 8.80 8.72 7.57 A7V 120 0
86 * 23 Tau Be* 03 46 19.5858871361 +23 56 54.092177220 3.70 4.12 4.18   4.16 B6IV(e) 446 2
87 HD 23489 ** 03 46 27.2785317984 +24 15 17.995532328 7.56 7.44 7.34 7.28 7.23 A2V 131 0
88 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
89 HD 23514 * 03 46 38.3922026460 +22 55 11.199934340 9.95 9.93 9.43 8.96 8.84 F5V 157 0
90 HD 23511 PM* 03 46 39.3335012425 +24 06 11.531508492   9.75 9.28   8.75 F5V 144 0
91 HD 23513 PM* 03 46 39.9969863424 +23 06 37.194884441 9.85 9.91 9.40 8.97 8.83 F5V 115 0
92 HD 23568 ** 03 46 59.3943532032 +24 31 12.448365564   6.83 6.82   6.76 B9.5V 165 0
93 V* V534 Tau dS* 03 47 03.5551874064 +24 49 11.812255356   8.65 8.30   7.83 A9V 120 0
94 V* V1210 Tau gD* 03 47 04.2131220000 +23 59 42.773483436   8.67 8.38   8.02 F0V 138 0
95 HD 23584 * 03 47 10.0537991349 +24 16 35.945010583   9.99 9.58   8.92 F6V 102 0
96 HD 23608 SB* 03 47 16.5764110218 +24 07 41.906506002   9.15 8.72   8.09 F3V 92 0
97 V* V647 Tau dS* 03 47 19.3458598776 +24 08 20.815318464   8.51 8.26   7.97 A7Vs 182 0
98 HD 23632 * 03 47 20.9688302904 +23 48 12.036277512   7.04 7.02   7.01 A1V 138 0
99 HD 23610 SB* 03 47 22.8997617600 +22 55 19.586180208   8.41 8.20   7.83 A3/7 78 0
100 V* V1228 Tau dS* 03 47 24.0779661960 +24 35 18.510029196   7.89 7.71 7.5 7.45 A4V 100 0
101 V* V650 Tau dS* 03 47 26.8283452536 +23 40 41.988023688   7.93 7.79   7.61 A3Van 140 0
102 * eta Tau Be* 03 47 29.0765529 +24 06 18.488347 2.44 2.78 2.87 2.84 2.88 B7III 557 1
103 HD 23664 * 03 47 46.8353490240 +25 23 08.508918516   8.55 8.30     A2 70 0
104 HD 23713 ** 03 48 07.1684166120 +24 08 31.430682996   9.86 9.43 9.32 8.64 F7V 111 0
105 HD 23733 SB* 03 48 13.5574497288 +24 19 06.222596880   8.73 8.41   7.83 A9V 104 0
106 HD 23732 * 03 48 16.8727819416 +25 12 54.442464768 9.67 9.62 9.21 8.70 8.55 F4V 106 0
107 HD 23753 PM* 03 48 20.8167826752 +23 25 16.495877028 5.06 5.38 5.45 5.42 5.48 B8V 194 0
108 HD 23763 * 03 48 30.0969016008 +24 20 43.894342464   7.08 6.96   6.79 A2V 136 0
109 HD 23778 ** 03 48 34.7984058048 +24 10 52.199121955   9.54 9.05 9.16 8.45 F4V 77 0
110 HD 23791 * 03 48 43.8952872624 +23 15 35.332233840   8.64 8.38   8.05 kA7hA8mF0IV 109 0
111 * 27 Tau SB* 03 49 09.7430578114 +24 03 12.301679809 3.18 3.54 3.63 3.62 3.68 B8III 387 0
112 * 28 Tau Be* 03 49 11.2165977912 +24 08 12.156712008 4.73 5.01 5.09   5.08 B8Vne 494 0
113 HD 23886 PM* 03 49 25.9835814864 +24 14 51.724461948   8.15 8.01   7.79 A5Vn 103 0
114 HD 23912 Pe* 03 49 32.7250650456 +23 22 49.444085604   9.55 9.14   8.63 F4Vn 106 1
115 HD 23924 * 03 49 40.9233801600 +23 20 29.652869940   8.32 8.13   7.91 A5VkA7mA7 124 0
116 HD 23923 * 03 49 43.5315887616 +23 42 42.667696476   6.104 6.153   6.18 B8.5V 173 0
117 HD 23964A SB* 03 49 58.0556899152 +23 50 55.288075236   6.82 6.81 6.3 6.74 B9.5VspSiSrCr 167 0
118 HD 23975 * 03 50 17.6727280290 +25 22 46.443238418 10.17 10.146 9.733 9.2 9.120 G0 88 0
119 HD 24013 * 03 50 28.0580748936 +24 29 43.755282348   7.57 7.45     A2 35 0
120 HD 24076 * 03 50 52.4294239848 +23 57 41.294242296   7.02 6.92   6.81 A2V 94 0
121 HD 24178 PM* 03 51 57.4196339616 +25 59 55.944061620   7.82 7.68     A0 50 0
122 HD 25102 SB* 03 59 40.4960115792 +10 19 49.359946008   6.762 6.340 6.097 5.860 F5V 156 0
123 * gam Dor gD* 04 16 01.5866224848 -51 29 11.932714356   4.55 4.20     F1V 337 0
124 * 60 Tau dS* 04 22 03.5181398136 +14 04 37.912925064   6.054 5.710 7.05 5.38 kA3hF2mF2(III) 288 0
125 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
126 * g Lup PM* 15 41 11.3768069149 -44 39 40.341696305   5.036 4.633     F4V 212 0
127 * bet TrA PM* 15 55 08.5620636 -63 25 50.615531 3.19 3.14 2.85 2.53 2.38 F1V 174 0
128 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
129 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 561 0
130 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1285 0

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