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2. Sample selection

From the catalogue by Olsen (1983) of four-colour photometry of all A5-G0 stars in the HD catalogue to mv = 8.3, those F stars were selected which have evolved sufficiently off the ZAMS (i.e. by roughly 0.5 - 2.0 mag in Mv) that individual ages can be determined from comparisons with theoretical isochrones. The following overall criteria were used (the precise tex2html_wrap_inline1217c1  limit varying from 0.18 to 0.12 with b-y  within this range):

0.219 < b-y  < 0.391

0.066 < tex2html_wrap_inline1217c1  < 0.15.

Except that the selection of stars took place before Htex2html_wrap_inline1197 photometry was complete for all the stars, these criteria are quite similar to those used by E93 to define their sample of stars.

As the CORAVEL observations got under way it was realized, however, that over half of the stars with b-y  < 0.27 were rotating too rapidly to yield usable radial velocities. The stars in the colour range 0.219 < b-y  < 0.270 and north of declination tex2html_wrap_inline1249 were therefore transferred to the CfA instruments, together with a few later-type stars that were also rotating too rapidly for CORAVEL (and are found here to be short-period binaries). There is, however, enough overlap with the early CORAVEL results to ensure good consistency of the radial-velocity zero-points of the two systems.

Of the 669 stars on the original observing list (26% of all stars in the Olsen catalogues in the same colour range and over the whole sky), results are presented here for a total of 595 stars (Tables 1 and 2 (click here)), while 73 proved to be rotating too rapidly even for the CfA technique (v sin i  > 120 km s-1); for completeness, these stars are listed in Table 4 (click here). A new, precise spectroscopic orbit for the double-lined eclipsing binary EI Cep, which is included in the photometrically defined sample, will be published separately.

   

    HD RA       Dec    Temp1 Temp2 tex2html_wrap_inline1263   n V0    m.e. Span q     m.e. Rem.
    5153 00:53:36.9 +24:55:58 7250/010 7000/010 0.65 3 -24.61 0.29 780 0.926 0.015 SB2W
    5843 01:00:13.1 +11:56:07 7000/010 6750/010 0.73 25 -5.64 0.24 1471 0.921 0.018 SB2O
    6469 01:06:08.4 +35:30:58 7250/120 6750/000 0.06 6 12.76 2.66 1290 SB2C
    8026 01:20:47.7 +56:12:28 7250/120 6750/000 0.07 5 -0.28 1.01 1809 SB2C
    8136 01:22:39.8 +68:33:55 6750/010 6750/010 0.87 8 -19.48 1.29 1128 1.101 0.045 SB2W
  10629 01:44:30.7 +39:57:30 7000/120 7000/030 0.41 3 -4.08 1.20 1028 SB2C
  12180B 01:58:60.0 -22:55:03 6500/000 6500/000 1.00 3 29.46 0.23 751 0.976 0.014 SB2W
  12637 02:04:45.8 +39:26:06 7250/100 6750/000 0.11 11 6.13 1.00 1298 SB2C
  12984 02:07:01.8 -04:13:03 6750/080 6750/010 0.15 3 -14.56 6.89 753 0.952 0.665 SB2W
  14124 02:19:21.6 +60:29:10 7250/120 6750/000 0.39 5 -1.16 0.72 1701 SB2C
  15227 02:27:32.0 +16:38:36 6750/000 6750/000 0.93 8 13.39 0.20 1446 0.978 0.019 SB2W
  17613B 02:49:52.2 +08:56:16 6000/000 5750/000 0.37 6 2.26 0.40 820 0.875 0.062 SB2W
  19115 03:03:59.9 -17:44:16 6750/030 6500/030 0.49 3 37.16 2.94 764 0.877 0.122 SB2W
  22054 03:32:13.1 -31:34:13 6750/000 6500/000 0.66 10 17.44 0.89 1090 0.914 0.037 SB2O
  24623 03:54:34.9 -09:31:13 6750/000 6500/000 0.66 22 9.47 0.09 1452 0.982 0.004 SB2O
  36845 05:33:43.5 -18:40:42 6750/100 6500/000 0.14 7 38.23 1.33 1741 SB2C
  37038 05:35:32.4 -01:50:46 7000/100 6750/000 0.23 9 17.06 0.38 1777 SB2C
  37603A 05:40:18.1 +15:21:01 7000/000 6750/000 0.80 10 21.01 0.73 1087 1.029 0.040 SB2W
  37603B 05:40:18.1 +15:21:01 7000/000 6750/000 0.58 18 20.62 0.38 1087 0.938 0.052 SB2O
  39166 05:54:03.5 +57:02:44 7000/000 7000/000 0.91 25 9.01 0.12 1800 0.997 0.006 SB2O
  44849 06:28:21.9 +62:42:44 7250/100 6750/010 0.13 4 16.68 1.07 1044 SB2C
  54901 07:11:16.8 +15:19:56 7000/020 6500/000 0.17 24 -9.86 0.15 1796 0.761 0.011 SB2O
  57769 07:24:17.2 +36:18:38 6750/090 6750/010 0.09 11 -34.31 3.08 1800 SB2C
  63424 07:47:10.1 -39:06:12 6750/000 6750/000 0.73 3 -0.50 0.18 736 SB2C
  74425 08:47:50.8 +66:12:38 6000/050 6000/040 0.50 16 16.88 0.35 1321 0.857 0.009 SB2O
  75638 08:51:26.3 +12:07:32 7000/080 6750/010 0.10 13 11.05 0.91 1346 SB3O
  76702 09:07:58.0 +81:02:28 7000/100 6500/010 0.04 6 6.38 1.32 1188 SB2C
  80853 09:21:10.3 -35:21:25 7000/100 6750/010 0.07 7 24.50 0.67 1211 SB2C
  85294 09:50:41.0 -07:22:56 7000/090 6750/010 0.07 9 28.36 1.70 1500 0.661 0.064 SB2W
  86579 09:59:18.5 -03:04:29 7000/100 6750/010 0.11 7 7.26 1.42 1788 1.404 0.951 SB2W
  87810 10:07:07.6 -21:15:20 6750/000 6750/000 1.00 23 -0.24 0.07 1536 0.997 0.004 SB2O
  88162 10:10:22.6 +20:56:43 6750/010 6750/010 0.83 20 -27.67 0.15 1774 0.952 0.022 SB2O
  88788 10:14:19.5 -12:35:03 7000/120 6500/010 0.07 6 2.75 1.95 1479 SB2C
  92197 10:38:59.4 +15:58:59 6750/010 6750/010 0.80 6 8.88 2.11 1791 0.671 0.187 SB2W
  93785 10:49:15.0 -26:48:55 7000/120 6750/030 0.33 5 21.18 2.59 1502 SB2C
  94034 10:50:44.3 -34:29:11 6750/010 6750/010 0.91 5 6.03 0.26 797 1.098 0.051 SB2W
  96050 11:04:31.9 -21:07:35 6750/010 6750/010 0.87 4 6.31 1.28 1433 0.962 0.043 SB2W
104636 12:02:59.9 +41:03:55 7000/100 7000/000 0.09 12 3.56 1.41 1216 SB2C
108100 12:24:56.9 +42:51:17 7000/080 6750/020 0.17 7 -7.76 1.04 1796 SB2C
109557 12:35:42.7 -16:49:34 7000/100 6750/020 0.24 5 1.09 1.26 1765 SB2C
110606 12:43:40.4 -35:24:50 7000/020 7000/010 0.81 5 4.74 0.28 790 0.912 0.034 SB2W
121648 13:56:09.5 +25:55:07 6750/010 6750/010 0.86 30 -29.50 0.27 1947 0.976 0.010 SB2O
128901 14:37:46.2 +52:01:57 7000/010 7000/010 0.75 7 7.69 7.42 1624 SB2C
131773 14:56:21.6 -29:57:36 7000/080 6750/000 0.12 4 -9.88 0.69 830 SB2C
134193 15:08:56.7 -11:47:25 6750/010 6750/010 0.56 13 4.77 0.22 1208 0.884 0.009 SB2O
135100 15:11:26.6 +48:41:34 6750/020 6750/010 0.67 6 -14.84 0.18 1656 0.944 0.008 SB2W
136276 15:20:09.3 -13:11:30 6750/010 6750/010 0.45 5 -12.67 0.67 1209 0.828 0.024 SB2W
147428 16:20:16.9 +40:15:33 6750/030 6500/010 0.18 19 -19.66 0.18 1620 0.709 0.018 SB2O
155025 17:07:59.1 +27:06:05 7000/020 7000/000 0.46 8 -16.78 1.55 1291 1.027 0.163 SB2W
156458 17:17:36.9 +01:44:32 6750/010 6750/010 0.39 15 -30.65 0.18 1584 0.961 0.053 SB2O
159172 17:33:58.9 -17:50:10 6500/010 6500/000 0.38 15 2.60 0.58 1484 0.822 0.027 SB2O
171275 18:32:17.1 +36:25:34 7000/030 7000/020 0.29 28 -30.87 0.18 1540 0.824 0.010 SB2O
176409 18:56:55.1 +56:44:58 7000/100 6750/000 0.04 8 -28.30 1.57 1573 SB2C
176613 19:02:19.6 -29:20:30 7000/010 7000/010 0.90 4 -1.76 0.32 1327 0.968 0.023 SB2W

 Table 2: Data for stars with double-lined or composite spectra. Coordinates are for equinox J2000;
V0 and m.e. in km s-1, and Span in days

 

    HD RA       Dec    Temp1 Temp2 tex2html_wrap_inline1263   n V0    m.e. Span q     m.e. Rem.
177005 19:01:14.7 +35:37:25 7000/010 7000/010 0.19 13 2.79 0.49 1560 0.739 0.024 SB2O
192327 20:14:19.9 +00:08:39 7000/000 8 -32.85 0.49 1409 SB2C
194032 20:22:20.4 +29:05:26 7000/000 11 -29.95 0.55 1596 SB2C
195147 20:10:55.5 +84:32:40 7000/020 7000/010 0.50 4 -11.81 0.89 1061 0.868 0.044 SB2W
198226 20:48:06.2 +27:27:24 6750/030 6750/040 0.70 21 -16.03 2.25 1471 SB3O
203031 21:19:00.1 +26:05:23 7000/050 7000/010 0.22 21 6.43 0.19 1474 0.677 0.015 SB2O
205798 21:36:53.8 +33:43:06 7000/050 7000/040 0.25 10 -25.47 1.10 1419 0.277 0.014 SB2W
211244 22:15:26.6 +18:36:11 7000/070 7000/060 0.75 7 2.43 1.11 1386 0.895 0.025 SB2W
215306 22:43:48.8 +27:41:01 7000/100 7000/010 0.25 7 -11.66 0.55 1505 SB2C
221431 23:32:18.4 -33:40:32 7000/020 7000/000 0.34 6 -4.35 0.10 1377 0.898 0.005 SB2W
222995 23:45:37.1 +13:09:09 6750/040 6750/000 0.30 19 -20.28 0.25 1507 0.770 0.025 SB2O

 Table 2: continued

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