Publications of the Astronomical Society of the Pacific 88:95-110, April 1976

SPECTRAL CLASSIFICATION OF THE BRIGHT F STARS

ANNE P. COWLEY Dominion Astrophysical Observatory, Victoria, B.C., Canada The University of Michigan Received 1975 November 20

New uniform two-dimensional spectral types are presented for 575 stars, most of which are F stars. Only a few peculiar spectra, other than composites, were found although care was taken to note stars with un- usually strong or weak metal characteristics. Key words: spectral classification — F-type stars

being widened to about 0.6 mm. for most stars only Introduction one plate was available. For a small number of the A long-term observing project to assign Μ Κ spectral stars independent classifications were made from two types to the stars in the Bright Star Catalogue was un- or more plates; in general the agreement was very dertaken some years ago. To date data for most stars good. with HD types B8-A9, north of ~ 20°, have been pub- lished as well as some of the F0 stars, (see Cowley and Classifications Fraquelli 1974; Cowley et al. 1969 and references Table I lists the adopted standards. These are taken therein). Previously many of these stars had only a from Morgan and Keenan (1973), Morgan and Abt spectral class, but no assigned luminosity type. In the (1972), Johnson and Morgan (1953), and Morgan, above mentioned papers die spectral types were based Keenan, and Kellman (1943) (the MK Atlas). on 125 Â mm-1 spectrograms obtained at McDonald Table II gives the new spectral type with remarks Observatory. The material presented here comes from when appropriate, plus the previous type and its plates taken with the 37-inch telescope in Ann Arbor. reference. Occasionally two references are given. A The dispersion at Hy is 70 Â mm-1 with all spectra key to these references is presented at the end of the

TABLE I Standards Used in Classification V IV III II lb la A7 a Aql y Boo A9 HR 2557 HR 7876 HR 6144 F0 y Vir δ Aql HR 1242 φ Cas FI HR 7823 F2 78 UMa l Leo β Cas 16 Per ν Aql 89 Her o" Boo HR 8765 HR7222 F3 HR 1279 HR 8071 F5 1 13¾ 48 Gem HR 856 41 Cyg a Per 44 Cyg ν Per 35 Cyg F6 π3 Ori 40 Leo HR831 25 Mon HR3603 110 Her HR4843 ι Vir α Tri (9UMa HR 6577 F7 θ Boo HR 3794 aPeg F8 υ And υ Peg γ Cyg 8 CMa F9 β Vir X Her GO η Cas η Boo 31 Com β Com G2 HR 483 β Dra {Mon 95

TABLE II

Spectral Types for Program Stars

Name HR HD Classification Remarks Previous Type Reference

17 400 F8 V dF4 Β 6 Cet 33 693 FS V F6 V J 40 895 GO V GO III Η C 35 Psc 50 1061 F1 IV-V UU Psc, Algol-type P=.842 FO IV C 66 1343 F4 V F4 IV-V C

ρ And 82 1671 F6 IV F6 IV Η 107 2454 F5 V Sr enhanced F3 II, F6 V Η, Κ 28 And 114 2628 Am: kl (K)-FO(m); see notes Am; A7 III J, C 115 2630 F4 IV F5 V Κ 14 Cet 143 3229 F5 IV dF2 Β

145 3268 F8 V F7 V Η 157 3421 02 II-III G5 III J 200 4295 F3 V F2 Β 206 4338 F2 III F1 IVn C 61 Psc 217 4568 F6 V F8 V Η

64 Psc 225 4676 F7 V F8 V J 65 Psc 230 4757 F3 III northern component; see notes F4 III C 65 Psc 231 4758 F2 III or II-III, exp. strong F5 III C 2 Φ Cet 235 4813 F8 V FS V J 244 5015 GO V F8 V, F8 IV J

297 6210 F6 V dF5 Β 26 Cet 301 6288 A7 III: ν weak FI V C 303 6301 F5 V F7 IV-V H 72 Psc 308 6397 F4 V F4 II-III H 77 Psc 313 6479 F5 V binary with HR 31^+ F5 V H

TT Psc 314 6480 F6 V see HR 313 F6 V J 78 Psc 327 6680 F2 IV F3 IV-V H 30 Cet 329 6706 F5 III F5 IV Κ 80 Psc 330 6763 F2 IV F0 III-IV C ζ Psc 362 7345 F7 V F8 V H

37 Cet 366 7439 F5 V F5 V C 38 Cet 368 7476 F5 V F5 V H 375 7732 F4 IV 05 III+ J 42 Cet 385 8036 A7 V + Κ III; G8 III: + A7 V J 391 8272 F4 V dF4 Β

404 8556 F5 V: weak exposure F4 V C 407 8634 F6 IV F5 III H 409 8671 F7 V dF6 Β 410 8673 F7 V F5 V H 415 8774 F7 IV F7 IV Κ

TABLE II {Continued)

Name HR HD Classification Remarks Previous Type Reference

ω And 417 8799 F5 V Γ4 IV J 47 Cet 421 8829 FC III δ Del C 38 Cas 427 9021 F6 V dF6 Β 466 10009 F7 V F5 Β 484 10308 F5 IV F2 III Η

492 10453 F4 V dF2 + dF3 Β 518 10874 F3 V F5 Β 529 11151 F5 V F5 V Κ 1 Ari 530 11155 A5 + Κ III: visual binary KO III, A3 V Β, Κ 534 11257 F2 III F2 V Κ

10 Ari 605 12558 F8 V weak exposure F8 IV Η 624 13201 F4 V F5 V Η 638 13456 F5 V weak and streaked dF2 Β η Ari 646 13555 F5 IV F6 V Η 20 Ari 656 13871 F5 V F6 IV-V Η

21 Ari 657 13872 F6 V F6 V Η 672 14214 GO V GO V Η 66 And 709 15138 F4 V F4 V Κ 12 Tri 717 15257 F0 III sg Α7 Β 728 15524 F5 V F6 IV Η

26 Ari 729 15550 F0/1 V Α9 V Κ 29 Ari 741 15814 GO V F8 V Η 756 16176 F5 IV F5 Β 761 16220 F8 V dF6 Β 31 Ari 763 16234 F7 V dF5 Β

30 Ari 764 16232 F4 V dF6 Β 765 16246 F7 V weak exposure F6 III Η 768 16327 F6 III gF6 Β 770 16399 F6 IV weak exposure F6 V Η ε Cet 781 16620 F5 V: weak exposure F5 V Κ

783 16647 F3 V: grainy F5 V Η 784 16673 F6 V FS V Η 84 Cet 790 16765 F7 IV F8 V Η 796 16825 F5 III: poor exposure dF7 Β θ Per 799 16895 F7 V F8 V Κ

τ1 Eri 818 17206 F5 V F6 V J 820 17240 A9 V F2 Β SU Cas 829 17463 F5 II-III very sharp lines; Cepheid F5 Ι-ΙΙ J 20 Per 855 17904 F5 .III-IV F6 V, F2 V Κ 860 17948 F4 V F4 V, F6 V Κ

ρ Ari 869 18256 F6 V F6 V Η 870 18262 F7 IV/V : weak exposure F7 IV Η 47 Ari 878 18404 F5 IV dF5 Β γ Per 915 18925 K0 III + A2 G8 III: + A3V J 961 19978 A5 III: Α6 V Κ

TABLE II {Continued)

Name HR HD Classification Remarks Previous Type Reference

94 Cet 962 19994 GO IV F8 V H 975 20193 F3 III F4 V Κ 14 Eri 988 20395 F4 V: weak exposure dF4 Β 1107 22701 F5 IV dFl Β 1124 23005 F3 II-III F0 IV Κ

1125 23010 F6 II F2 IV Κ 1129 23089/90 A2: + Κ III: GO III + A3 V J 1170 23728 Α7 Hin A9 IV Κ 1196 24164 A7m A 5m C 1201 24357 F2 V: grainy, weak exposure F4 V J

43 Per 1210 24546 F6 V: overexposed F5 IV, F5 V J 1233 25102 F5 III F5 V J 1249 25457 F5 IV F6 V J 36 Tau 1252 25555/6 AI: + G III: GO III + A4 V J 50 Per 1278 25998 F7 V dF7 Β

44 Tau 1287 26322 F3 V F2 IV, F2 IV-V C, M 45 Tau 1292 26462 F4 V poor exposure F1 IV-V C .1 Eri 1298 26574 F3 V F1 III Κ 48 Tau 1319 26911 F6 V F6 III Η 1354 27429 Fl/2 V: weak exposure F2 V M

1358 27483 F7 Vn F7 V H 56 Per 1379 27786 F 4 V dF5 Β 67 Tau 1388 27946 A8 Vn A8 V C 70 Tau 1391 27991 F7 V GO V, F7 V H, M 1406 28271 F7 V dF4 Β

1436 28736 F5 V dF4 Β 1455 29104 Κ III: 4- A5 : F8 Β 1459 29169 F2 V: grainy, weak F5 IV H 2 Cam 1466 29316 F0 V A8 V Κ 1468 29329 F7 V F5 Β

1470 29364 F2 V: weak exposure dF2 + dF3 Β 1489 29645 GO V GO V Κ 1491 29678 A9/F0 IV Α6η Β 55 Eri 1505 30020 Fm: F4 ΙΙΙρ Sr Μ 97 Tau 1547 30780 A9 Hin Α7 IV-V C

1566 31236 F3 IV dFO Β 1593 31662 F4 V F5 Β 5 Aur 1599 31761 F5 IV F5 V Κ ε Aur 1605 31964 F3/4 la Α8 la J 9 Aur 1637 32537 F3 IV F0 V J

1644 32655 F2 II F2 II? p? J 15 Ori 1676 33276 F4/5 III F2 IV J 1686 33564 F7 Vs F6 V J 21 Ori 1746 34658 F4 II-III F5 III H 1822 35984 F5 IV weak exposure F6 III H

TABLE II {Continued)

Name HR HD Classification Remarks Previous Type Reference

1882 36876 F5 IV weak exposure F0 Β 2030 39286 A2 V + K: weak B9 V 4- G C χ1 Ori 2047 39587 G1 V GO V J 2122 40832 F4 V F4 V Κ 39 Aur 2132 41074 F2 V overexposed A8n Β

2137 41162 G III: + late A F8 Β 71 Ori 2220 43042 F5 IV weak exposure F6 V Η 2233 43318 F6/7 V F7 V Η 74 Ori 2241 43386 F4 IV F5 IV-V Η 2452 47703 F8 III F5 Β

ξ· Gem 2484 48737 F7 IV F5 IV, F5 III J 2597 51330 FOIb - II F2Ib - II C 2620 52100 A9 IV FO Β 2643 52711 F8 V G2 V 21 Mon 2707 55057 F2 V A8n Β

6 Gem 2777 56986- FO IVn resolution poor FO IV, F2 IV J 2835 58551 F7 Vn grainy plate F6 V H 61 Gem 2837 58579 F2 V A6n Β 63 Gem 2846 58728 F6 IV F5 IV-V J 22 Lyn 2849 58855 F6 V F6 V J

2918 60803 G1 V GO V H o Gem 2930 61110 F4 III F3 III J 2936 61295 F6 II F0 Β α CMi 2943 61421 F5 V F5 IV J 2962 61859 F6 III F7 V Κ

3028 63332 F6 V dF6 Β 3087 64685 F2 IV d? F4 Β 3144 66011 F7 V weak exposure GO IV A 3221 68457 A7m dA7 Β 3228 68703 F0 III δ Del C

30 Lyn 3254 69548 F4 V dF2 Β χ Cnc 3262 69897 F6 V F7 V H 20 Cnc 3284 70569 A9 V: poor exposure dFO Β 3295 70937 F5 IV F7 V H 25 Cnc 3299 71030 F5 III (or Fm) F6 V H

29 Cnc 3333 71555 A5 Vn A5 V C 3342 71766 F3 III weak exposure F2 Β υ1 Cnc 3355 72041 F0 III weak exposure A9n Β 32 Lyn 3365 72291 F5 IV F5 V Κ 3380 72617 F3 IV FO Β

3423 73596 F5 III F2 Β ε Cnc 3429 73731 A5m Am, A8 V J, C 3451 74243 F7 V F2 Β ε Hya 3482 74874 F0 V + Κ III: KO III + A5 J 3499 75332 F7 Vs dF7 Β

TABLE II (Continued)

Name HR HD Classifications Remarks Previous Type Reference

5 UMa 3505 75486 F2 III F0 Β 3506 75487 F5 IV-V gF2 Β 3546 76292 F3 III gF3 Β 61 Cnc 3563 76572 F6 IV dF3 Β α Cnc 3572 76756 A3 m A5m C

3579 76943 F7 V F5 V J 3581 76990 F2 III dF2 Β 3586 77093 A7 III F0 Β 66 Cnc 3587 77104 A3 V A2 V C 2 σ UMa 3616 78154 F6 IV-V F7 IV-V J

3620 78234 F2 V scratch on spectrum F2 Β τ UMa 3624 78362 A4m Am J 3625 78366 GO V dGO Β 16 UMa 3648 79028 F9 V dF9 Β 3697 80290 F3 V dF3 Β

3701 80441 F4 V F3 V + F3 V J 23 UMa 3757 81937 F0 III-IV very weak exposure F0 IV J τ1 Hya 3759 81997 F6 IV F6 V J 22 UMa 3768 82189 F7 V dF6 Β 3811 82780 F4 : very weak exposure F2 Β

3847 83727 F0 V: weak exposure F0 Β 13 LMi 3857 83951 F3 IV weak exposure dFl Β 3859 83962 F2 V F2 Β 28 UMa 3865 84179 F2 Vn weak exposure A7n Β 3879 84607 F4 III F5 IV Η

3885 84812 F0 IVn F0 Β 20 Leo 3889 85040 F0 Hin A8s Β 4 Sex 3893 85217 F6 V F6 V J 19 LMi 3928 86146 F5 V F6 V Κ 3936 86358 FI V F0 Β

3954 87141 F7 IV dF4 Β 3969 87500 F2 Vn: F0 Β 3979 87822 F5 IV F6 V Η 3988 88182 A 3m A 5m C 3991 88215 F3 IV weak exposure F5 V J

Leo 3998 88355 F4 V F7 V Η 4016 88815 F2 V F0 Β 4021 88849 A7m A7m C 39 Leo 4039 89125 F8 V F6 V Η ε Sex 4042 89254 F4 V: F1 III J

4047 89343 A7 IV-Vn F0 Β 4051 89389 F9 V F8 Β 4067 89744 F7 V dF6 Β 4079 89995 F6 V F5 V Η 4084 90089 F4 V F5 IV J

TABLE II (Cont

Name HR HD Classifications Remarks Previous Type Reference

30 LMi 4090 90277 A9 III F0 V J 36 UMa 4112 90839 F8 V F8 V J 35 LMi 4150 91752 F3 V dF3 Β 4191 92787 F5 III dFO Β 44 LMi 4230 93765 F2 IV F5 V Η

4251 94388 F 8 V F6 V J 48 LMi 4254 94480 F2 V Am, A8 V Β, Κ 55 Leo 4265 94672 F2 V dF3 Β 4281 95216 F6 V F5 V Η 4285 95241 F7 V dGO Β

49 UMa 4288 95310 F0 IV Am J X Leo 4310 96097 Fpec see notes F2 III-IV J 4363 97855 F4 IV dF2 Β 4366 97937 F0 V A6n Β 4369 98088 Fp Sr, Eu, Cr sharp H + Κ cores Ap J

λ Crt 4395 98991 A7 Hin F5 IV J 81 Leo 4408 99285 F2 V dF2 Β 80 Leo 4410 99329 F3 IV A8n Β 4412 99373 F7 V F5 V, F6 IV Κ 4421 99747 FI V F5 V Κ

58 UMa 4431 99984 F4 V dF5 Β 4439 100203 F6 V F6 V J 89 Leo 4455 100563 F4 V F7 V Η 59 UMa 4477 101107 F2 II A7n Β 60 UMa 4480 101133 F5 Ills dF2 Β

62 UMa 4501 101606 F3 V F4 V Κ 4505 101688 F2 IV F3 V, F2 IV-V Η, Κ 93 Leo 4527 102509 A7 V + G III A + G5 III-IV J 4533 102634 F7 V F8 V Η 4536 102713 F6 IV F5 IV Κ

4572 103799 F7 V F6 V Κ 4584 104179 F0 IV Α9 III Κ 2 Com 4602 104827 F0 III Am, F0 IV-V 4606 104904 F6 V dF6 Β 4627 105678 F6 IV F5 Β

11 Vir 4629 105702 Fm: Am, F2-3 III J, Κ 4642 106022 F3 V F5 IV, F3 IV Η, Κ 4657 106516 F5 IV-V F5 V Η 4678 106976 A9 III-IV dF4 Β 4686 107192 F2 V F2 III Β

9 Com 4688 107213 F9 V F8 V Η 4698 107398 F2 V F3 V Κ 12 Com 4707 107700 A2 V + G III GO III-IV + A3V Β 17 Vir 4708 107705 GO V F8 V, GO V Η 4746 108506 F3/4 V F2 III Η

TABLE II {Continued)

Name HR HD Classification Remarks Previous Type Reference

18 Com 4753 108722 F4 V Sr enhanced F5 III, F5 IV H, J 7 CVn 4761 108845 F6 V dF6 Β 4767 108954 GO V dF7 Β η Crv 4775 109085 FQ IV F0 IV J 4776 109141 F2 V dA9 Β

4821-2 110317/8 F5 III: strong exposure dFl, dF6 Β 4856 111199 GO V weak exposure F8 IV Η 4867 111456 F5 V: F6 V J 4886 111893 A5 V: A5 V, A7 V J, C 38 Vir 4891 111998 F7 V F8 IV-V Η

8 Dra 4916 112429 A9 V A5n Β 4926 113022 F7 V F7 IV, F5 V Η, Κ 4934 113337 F6 V dF4 Β 48 Vir 4937 113459 F0 V A7n Β 39 Com 4946 113848 F0 V F4 V Η

17 CVn 4971 114447 F0 V A9 III-V Κ 53 Vir 4981 114642 F5 IV F6 III-IV J 5005 115308 F0 V FI IV Κ 5014 115488 A7 IV (or mild A7m:) F0 Β 20 CVn 5017 115604 F5 II F0 II-IIIp,F3III J, Κ

66 Vir 5050 116568 F2 IV F6 V H 70 Vir 5072 117176 G5 V G5 C, M 5074-5 117200/1 FI IV F0 F0 Β 5083 117361 F0 IV Sr enhanced dF2 Β 5091 117566 G2 V gG4 Β

5110 118216 F5 III F2 IV J 25 CVn 5127 118623 kl Vn: Α7 III J 5129 118660 F0 IV A9 III-IV Κ 5138 118889 FI V F2 III, F0 V Η, Κ 5148 119124 F9 V dF9

5156 119288 F5 IVS F5 V Η 5177 119992 F7 IV-V dF4 Β 3 Boo 5182 120064 F8 II-III F7 HI- IV Η 5183 120066 GO V GO V C τ Boo 5185 120136 F7 V F7 V J

5202 120544 F7 V F8 Β 5233 121325 F8 V weak exposure F8 V Η 5243 121560 F5 V F8 V, F6 V Η, Κ 92 Vir 5244 121607 A8 III-IVn: weak exposure A8 V C 5245 121682 F2 II F4 IV-V Κ

5258 122106 F5 IV-V F6 V Η 5272 122703 F6 III: weak exposure F2 Β 5275 122797 F0 V F2 Β 5307 124115 F7 V F8 V Η 5317 124425 F7 V F7 V Η

TABLE II (Co

Name HR HD Classification Remarks Previous Type Reference

5322 124553 GO V dF8 Β 14 Boo 5323 124570 F6 IV dF6 Β 5346 125040 F5 V F8 V Η 5347 125111 F2 IV F2 Β 18 Boo 5365 125451 F3 V F5 IV-V J

5393 126251 F4 III dFl + dFl Β 5411 126943 FI IV F0 Β 26 Boo 5434 127739 F2 IV dF2 Β 5436 127821 F4 V dF4 Β 5437 127929 F0 III gFO Β

5441 127986 F7 IV F8 IV Κ 5445 128093 F5 V F4 V Η 5451 128332 F8 V F5 Β 5455 128429 F7 V F6 IV-V J 5472 129132 F3 V GO V H

5492 129798 F3 V: streaked F2 III, F2 V J, M 5524 130603 F 7 IV-V F2 V H 5529 130817 F2 V dF3 Β α1 Lib 5530 130819 F3 V F5 IV J α2 Lib 5531 130841 A2 IV A3 IV C

38 Boo 5533 130945 F4 V F7 IV Κ 5537 131040 F5 IV dF4 Β 39 Boo 5538 131041 F6 V dF6 + dF5 Β 5581 132254 F7 V dF7 Β 5583 132375 F8 V F8 V Η

40 Boo 5588 132772 F0 IV F2 Β 5610 133408 F0 V F0 Β 5612 133484 F6 IV dF5 Β i Boo 5618 133640 G0/1 Vn lines broad; W UMa star dGl Β 5630 134044 F8 V F5 Β

5 Ser 5694 136202 F9 V F8 IV-V J o Lib 5703 136407 F0 III A6n Β 5716 136751 F3 IV F4 IV Κ 8 Ser 5721 137006 F0 III F0 V J ε Lib 5723 137052 F5 V F5 V J

,,1 Boo 5733 137391 F2 III-IV F0 V, F2 IV J, Κ 5756 138268 A7 Vn A8 V C 5779 138763 GO V GO Β δ Ser 5788 138917 F0 IV F0 IV J 14 Ser 5799 139137 A5 + Κ III G8 III+ A Η

τ5 Ser 5804 139225 F0 IV A6n Β 5813 139389 F5 V: weak exposure F5 V Η 5815-6 139460/1 F8 V F7 V Η 5817 139478 F2 pec like HR 4310 dA8 Β 5830 139798 F2 V F2 V J

TABLE II (Continued)

Name HR HD Classification Remarks Previous Type Reference

ψ Ser 5853 140538 G2 V G5 V Κ 5913 142357 F3 IV F5 II-III Η 5927 142640 F7 V: weak exposure dF4 Β λ CrB 5936 142908 A7 III F2 Β 49 Lib 5954 143333 F9 V F8 V C

5964 143584 Α8 III F0 IV J ρ CrB 5968 143761 GO IV G2 V J θ Dra 5986 144284 F7 V F8 IV-V J 5989 144362 F7 IV F3 V Η 6012 145100 F4 V dF6 Β

6067 146514 A8 IV-V dA6 Β 6091 147365 F3 IV F5 IV Η σ Ser 6093 147449 F3 V F0 V, F3 V J, Κ η UMi 6116 148048 F5 V dA8 Β 6137 148515 F2 IV dF3 Β

6189 150177 F6 V strong exp; metals weak? F6 V Η 6202 150453 F7 III dF6 Β 14 Oph 6205 150557 F2 III dF2 Β 39 Her 6213 150682 F2 Vn lines fuzzy; spec, binary F2 III Η 6222 151087 F2 IV F2 IV Η

6237 151613 F5 V F2 V J 20 Oph 6243 151769 F7 III F6 III J 6248 151900 F4 V F2 V H 6267 152303 F4 y dFl Β 6277 152569 F0 IVn F0 Β

6302 153229 F3 V F2 Β 19 Dra 6315 153597 F6 V strong exposure F6 V J 6328 153897 F5 V Sr enhanced F5 V H μ Dra 6369-70 154905/6 F8 V dF6 + dF6 Β 6375 155078 F5 V F5 V J

6377 155103 A7m A5m: C 6394 155646 F7 IV F8 V H 6434 156697 F0 IV F0 Β ξ Oph 6445 156897 FI Vg F2 V J 6449 156971 F2 IV F5 V Κ

6466 157358 G2 II-III GO III H 6467 157373 F4 V F2 V H 6469 157482 F9 V GO III H 6488 157853 F6 V GO III-IV H 6489 157856 F6 IV F6 IV H

6493 157950 F3 IIIS F3 V J 6496 157968 G0 III: dF5 Β 6504 158170 F5 IV F7 IV H 6541 159332 F4 V F6 V H 6560 159870 ATm or Fm very late metals; see notes A5 V + G III C

TABLE II (Continued)

Name HR HD Classification Remarks Previous Type Reference

26 Dra 6573 160269 G2 V: strong exposure G1 V, GO V J, 6594 160910 F0 IV F5 V Η 58 Oph 6595 160915 F7 V: weak exposure F5 V J ω Dra 6596 160922 F4 V F5 V J 6598 160933 F9 V dGO Β

6600 161023 F0 V F3 V Κ 6604 161149 F2 III F5 II Η ψ Dra 6636 162003 F5 V F5 IV-V J ψ Dra 6637 162004 GO V dF6 Β 6670 162917 F3 IV F6 V Η

6676 163151 F2 IVn F5 Vn Η 35 Dra 6701 163989 F7 IV F6 IV-V J 34 Dra 6725 16^613 F2 II-III F2 Β τ Oph 6733-4 164764/5 F5 III F2 + F2 Β 6764 165567 F7 V F7 V Η

99 Her 6775 165908 F8 V F8 V Η 73 Oph 6795 166233 F5 III F2 Β 6797 166285 F5 V dF4 Β 40 Dra 6809 166865 GO V dF5 Β 41 Dra 6810 166866 F8 V dF6 Β

36 Dra 6850 168151 F5 V mildly weak lined, see notes F5 V J Y Sgr 6863 168608 F5 Ib-II Cepheid F8 I J 6890 169268 F6 III-IV Am H 6898 169493 F0 Vn F2 III H χ Dra 6927 170153 F7 V F7 V G

U Sgr 6947 170764 F6 II Gepheid F5 lb J 45 Dra 6978 171635 F8 lab F7 lb J 6985 171802 F5 IIIS dF2 Β 6987 171834 F3 V F 4 V Η 6999 172088 GO V F9 V Κ

7000 172103 F5 III F5 IV Η 7014 172594 F2 Ib F2 Ib G 7034 173093 F7 V F7 V H 7047 173494 F0 IV F6 V H 7055 173638 F2 Ib F2 Ib-II J

7079 174160 F7 V F8 V H 7126 175317 F5 IV dF5 Β 7154 175824 F3 III dF4 Β 7163 176095 F5 IV F8 IV-V H FF Aql 7165 I76I55 F5 lab Gepheid F8 Ib H

11 Aql 7172 176303 F6 IV F8 III-V J 7205 176903 F5 IV-V F5 Β 7231 177552 FI V F0 Β 7247 178089 F3 IV F2 V: G 7263 178476 F3 V F3 V H

TABLE II (Continued)

Name HR HD Classification Remarks Previous Type Reference

19 Aql 7266 178596 F0 III-IV F5 IV H 7308 180583 F5 II Sr enhanced F8 II H 28 Aql 7331 181333 F0 II FO III C 7354 182101 F7 V F7 V H 7366 182475 FO III-IV FO Β

7386 182807 F9 V weak exposure F7 V Η 7389 182900 F6 V F7 IV Η 7454 184985 F8 IV-V dF6 Β 42 Aql 7460 185124 F5 V dFl Β 7484 185912 F6 V F6 V Κ

55 Sgr 7489 186005 FO IVn: see notes F0 III J 7496 186185 F7 IV F6 IV J 7501 186357 F2 lb F1 III C 7522 186760 GO V F8 Β 17 Cyg 7534 187013 F7 V F5 IV-V Η

7550 187458 F4 V F6 V Η 51 Aql 7553 187532 F2 V FO IV J 7577 188074 F2 V F2 V J 7599 188405 F2 V F5 IV H 7637 189340 G1 V GO V J

7671 190390 F1 III gF4 Β 7677 190590 A7 V A5 Vn C 7683 190771 05 V: strong exposure G5 IV J 7692 191096 F6 V F4 V C 7697 191195 F5 V dF4 Β

ξ íap 7715 191862 F6 V F8 V Β 7756 192985 F5 V: strong exposure F6 V H 7783 193664 G2 V strong exposure G3 V C ρ Cap 7822 194943 F4 IV F3 III-IV C 7855 195838 F7 IV dF8 Β

β Del 7882 196524 F7 IV Sr enhanced F5 IV, F5 III J 7887 196629 F1 Vn F0 V C 7907 196885 F8 IV: weak exposure F8 Β 7916 197101 FO IVn F2 Vn C 7925 197373 F6 IV dF4 Β

15 Del 7973 198390 F5 V F5 V H 4 Aqr 7982 198571 F7 V dF3 Β Τ Vul 7988 198726 F8 lb Cepheid F5 Ib J EM Aqr 8006 199124 A9 IV-V A9 Vn C 8025 199611 F1 III: F0 III C

1 Equ 8034 199766 F6 V F5 IV J 8037 199941 Fl/2 V strong exposure F4 III H 8056 200375 F5 V F5 Β 12 Aqr 8058-9 200496/7 A5 + G/K III visual binary; 3V3 sep. gG4 Β 4 Equ 8077 200790 F8 V F8 V H

TABLE II (Continued)

Name HR HD Classification Remarks Previous Type Reference

DT Cyg 8084 201078 F8 Ib-II Cepheid F5.5 I-II J 8099 201636 F3 IV F2 Β 6 Equ 8123 202275 G1 V F7 V J τ Cyg 8130 202444 F3 IV F2 V C 8157 203156 FI II F5 II Η

8170 203454 F9 V see notes F8 V Η 8189 203784 F6 II-III F5 IV Η 8191 203842 F5 III F5 III Η 8198 203925 A9 II Η and Κ narrow A8 III C 8205 204121 F5 V: strong exposure F6 V H

8208 204153 F0 V F0 V C 8212 204363 F6 V F5 Β 8220 204485 F2 V: F0 V C 8222 204577 F3 III gF2 Β 37 Cap 8245 205289 F5 V dFl Β

8250 205420 F6 IV F7 V H 5 Peg 8267 205852 F1 III(n) weak exposure FI IV C 4 Peg 8270 205924 A8 Vn A9 IV-Vn C 8276 206043 F2 V F2 V C y1 Cyg 8309 206826 F5 V F6 V J

κ Peg 8315 206901 F3 V F5 IV, F3 IV J, Κ 8330 207223 F3 V partially fogged plate F3 V C 8346 207760 F2 V dFl Β 15 Peg 8354 207978 F5 V F5 V H 8363 208177 F7 V F8 IV H

8376 208703 F5 IV F5 V H 8391 209149 F6 V F7 IV H 20 Peg 8392 209166 F5 II F4 III H 16 Peg 8400 209369 F5 IV F5 V J 8423 209942 F6 IV-V dF2 Β

8441 210210 F2 IV partially fogged plate FI IV C π Peg 8454 210459 F3 II F5 II-III H 8467 210763 F6 V F8 IV H 8472 210855 F8 III-IV F8 V J 8474 210884 F2 V dF2 Β

8507 211575 F6 III F5 Β 8510 211797 F0 III: strong exposure A9 IIIp? C 8514 211976 F6 V weak exposure F6 V H 33 Peg 8532 212395 F8 III-IV F7 V H 8536 212487 F5 IV: strong exposure F6 V H

ζ Aqr 8558-9 213051/2 F3 IV F2 IV + F2 IV J 37 Peg 8566 213235 A7m A7m C 8581 213429 F9 V GO V H 39 Peg 8586 213617 F3 III FI V C υ Aqr 8592 213845 F5 V F3 V J

TABLE II (Continued)

Name HR HD Classification Remarks Previous Type Reference

8617 214558 A3 V + G8 III: F8 comp 8653 215243 F6 Vn G8 IV Η ξ Peg 8665 215648 F5 V F7 V M, 8666 215664 F0 IVn F0 III-IV C 8681 216048 F0 IV: partially fogged plate F0 IV-V c

8687 216172 F5 V dF4 Β 8718 216756 F5 II F3 Β 8735 217131 F3 III F2 IV Η 52 Peg 8739 217232 F0 V A7 V C 8756 217498 A5 V A2 Β

8776 217926 F2 V F2 8788 218235 F6 V F6 V H 8792 218261 F9 V F7 V H 5 And 8805 218470 F4 Vs F5 V C 6 And 8825 218804 F5 V F6 IV H

7 And 8830 219080 A8 III A8 III C 8838 219291 F5 V F5 IV H 8845 219487 F4 V weak exposure F5 V H 8853 219623 F7 V strong exposure dF7 Β 96 Aqr 8868 219877 F3 V F3 V Η

12 And 8885 220117 F5 V F5 IV Η 8899 220460 F4 V strong exposure F6 III: Η 8938 221525 Α9 III A7 IV C 8941 221661 F3 III: G5 Β 16 Psc 8954 221950 F5 V F3 V, F6 V H, Κ

8955 221970 F6 V F5 III H 8973 222399 F2 III-IV F2 IV C 8977 222451 FI V F5 Β 9015 223346 F5 IV F5 III Η 9020 223421 F2 IV dF3 Β

9028 223552 F3 V dA9 Β 9034 223731 F5 V F5 V J 9057 224342 F8 III F5 Β 9059 224355 F6 V dF3 Β ω Psc 9072 224617 F3 V F 4 IV J

9074-5 224635/6 F7 Vs dGO + dGO 9078 224758 F7 IV dF5 85 Peg 9088 224930 G3 V G3 V, G2 V J 32 Psc 9093 225003 F2 IV F0 V C 9095 225045 F6 V: weak exposure F7 V Κ

TABLE H (C

Notes for Table II

HR 114: GN And; This star is problematical; previous types include A7 III, Am, and F2 V. Obviously there are conflicting criteria.

HR 230-1 Visual binary ADS 683; Bidelman has noted enhanced Sr in HR 231. It is possible the components have been interchanged either here or in previous studies, although the perhaps higher luminosity (II-III) for HR 231 suggests it is the same component observed by Bidelman.

HR 4310: Metallic line ratio are peculiar for a normal star. Many lines present; G band weak; 4415 strong, but 4173-78 not pronounced as in a giant; Sr enhanced; closest type is F5 III, but some individual lines wrong for this type.

HR 6560: The classification of this star is difficult. Cowley and Crawford (1971) called it a composite, however 4415 is weak and 4150 enhanced suggesting it may instead be related to the metallic line stars. However a G band, or at least a good many strong lines in the 4300 region, is present which is not common for the Am stars. The Κ line type is A7, Η lines approximately F3, and metallic line type F6-F8. Bidelman (private communication) agrees that it is probably an Fm.

HR 6850: Noted as weak-lined also by Roman (1952)

HR 7489: Lines broad; possibly a composite spectrum

HR 8170: Many weak metallic lines seem to be present; rotation may be very low.

References to Table II

The following symbols were used in the above table 2 in the reference column

to identify the source of the "previous spectral type". In general, reference C,

or M are used when available; if not Κ or J types are presented (with this author

chosing one type, if several are given). References are given by J and Κ to the

source of their quoted types. Β types are used when no other reference is available; the drawback to these is that often one does not know the source of

the spectral types.

Symbol References included in this symbol

Β Catalogue of Bright Stars (Hoffleit 1964)

C Cowley et al 1969; Cowley and Crawford 1971; Cowley and Fraquelli 1974.

TABLE II (Continued)

H Harlan 1969; Harlan and Taylor 1970; Harlan 1974

J Jaschek et al 1964 (Catalogue of Stellar Spectra Classified in the MK System)

Κ Kennedy 1974 (MK Classification Extension)

M Morgan and Abt 1972; Morgan and Keenan 1973; plus occasional reference to earlier papers which can be found in J

table. Although many of these stars did have two- (HR 6850) weak-lined star was found, and this one is dimensional types, they are based on a variety of data only a mild case. It had previously been noted by from many classifiers, so that it was often difficult to Roman (1952). intercompare types. It is hoped that this uniform We especially thank the numerous students who body of data will therefore be useiul. took many of the plates used in this project. Because A number of F stars have been classified by Harlan the 37-inch telescope is no longer in operation, it is (Harlan 1969, 1974; Harlan and Taylor 1970). We unlikely that further systematic classification of the have intercompared our types and luminosities to his because there are enough stars in common (155) to bright stars will be continued by the author. make such a comparison meaningful. We find a sys- The classifications were done while the author was in residence at the DAO, and she thanks Dr. Wright tematic difference in spectral types, such that between for his hospitality during her stay there. We thank A9 and F7 his types are later than ours while be- Dr. Bidelman for his comments on several stars. This tween F7 and G2 his types are earlier. In the mean, our F2s are called F4 by Harlan; our GOs are called work was supported by the National Science Founda- tion. F9 by Harlan. The average type agrees at F7 with a scatter of ±1.9 spectral subtypes. In luminosity his REFERENCES types tend to be slightly brighter. However, the average difference is only -f 0.2 ±1.0 luminosity Cowley, A. P., and Crawford, D. L. 1971, Pub. A.S.P. 83, 296. Cowley, A. P., and Fraquelli, E. 1974, Pub. A.S.P. 86, 70. class. Cowley, A. P., Cowley, C., Jaschek, M., and Jaschek, C. 1969, We note that very few peculiar stars are found in A.J. 74, 375. this temperature range, at least among the bright and, Harlan, Ε. Α. 1969, A.J. 74, 916. therefore, nearby stars. However, composites which 1974, ibid. 79, 682. were previously called F are easily distinguished Harlan, Ε. Α., and Taylor, D. C. 1970, A.J. 75, 507. Hoffleit, D. 1964, Catalogue of Bright Stars (Yale University: (K-line weak, H strong, G-band and metals strong). New Haven). A few new metallic-line stars were noted. In general Jaschek, C. de Sierra, H. C., and de Sierra, A. C. 1964, Cata- there are only a small number of stars which we would logue of Stellar Spectra Classified in the Μ Κ System, Obs. call Fm (K-line like F0 or later, but metallic-line Astron. de la Univer. Nacional de La Plata, Serie Astron. 28 characteristics — see Cowley et al. 1969). A striking (2). Johnson, H. L., and Morgan, W. W. 1953, Ap. J. 117, 313. example does occur in this sample (HR6560). Pre- Kennedy, P. M. 1974, MK Classification Extension (available viously it was classified as composite (Cowley and through Centre de Données Stellaires; Strasbourg). Crawford 1971). The numerous lines in the vicinity Morgan, W. W., and Abt, H. A. 1972, A.J. 77, 35. of the G-band still makes this revised type uncertain; Morgan, W. W., and Keenan, P. C. 1973, Annual Rev. of however, Bidelman (private communication) agrees Astr. and Astrophysics 11, 29. Morgan, W. W., Keenan, P. C., and Kellman, E. 1943, An that it is probably an Fm. A handful of stars with en- Atlas of Stellar Spectra (Chicago: University of Chicago hanced Sr were noted. Morgan and Abt (1972) have Press). also discussed some similar stars. Finally only one Roman, N.C. 1952, Ap./. 116, 122.