2005ApJ...634..451M

Query : 2005ApJ...634..451M

2005ApJ...634..451M - Astrophys. J., 634, 451-458 (2005/November-3)

Interstellar Ca II line intensities and the distances of the OB stars.

MEGIER A., STROBEL A., BONDAR A., MUSAEV F.A., HAN I., KRELOWSKI J. and GALAZUTDINOV G.A.

Abstract (from CDS):

We show that the equivalent widths of the well-known interstellar Ca II H and K lines can be used to determine the distances to OB stars in our Galaxy. The equivalent widths, measured in the spectra of 147 early-type stars, are strongly related to the Hipparcos parallaxes of those objects. The lines fitted to the parallax-equivalent width data are given by the formulae π=1/2.78EW(K)+95 and π=1/4.58EW(H)+102, where π is in arcseconds and EW is in milliangstroms. The form of the formulae, yielding a finite parallax even for zero absorption, shows that space within ~100 pc of the Sun contains very little Ca II, which is in agreement with the known dimensions of the Local Bubble. Using Ca II lines for distance determination does not require the knowledge of the absolute magnitude of the object; it is thus well suited for targets for which the absolute calibration is either not precise (OB supergiants) or not available at all (peculiar objects). We also demonstrate that neither the reddening E(B-V) nor the equivalent widths of interstellar K I and CH lines are suitable candidates for distance estimation, their relation with parallaxes being far less tight than for Ca II.

Abstract Copyright: ∼

Journal keyword(s): ISM: Lines and Bands - Stars: Distances - Stars: Early-Type

VizieR on-line data: <Available at CDS (J/ApJ/634/451): table1.dat>

Simbad objects: 148

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Number of rows : 148
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 * kap Cas s*b 00 32 59.9918836206 +62 55 54.413126128 3.50 4.30 4.16 4.02 3.96 BC0.7Ia 474 0
2 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1253 0
3 * phi Per Be* 01 43 39.6379691568 +50 41 19.433124998 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 594 0
4 HD 13256 s*b 02 11 43.9098216480 +60 42 44.500379976 9.8 9.69 8.68     B1Ia 71 0
5 HD 13854 s*b 02 16 51.7162480872 +57 03 18.882144756 6.10 6.76 6.48 6.14 5.95 B1Iab 217 0
6 * 10 Per s*b 02 25 16.0283450208 +56 36 35.354429280 5.95 6.56 6.26 5.93 5.74 B2Ia 248 0
7 HD 15785 s*b 02 34 48.0522508344 +60 33 07.449247908 10.033 8.82 8.37     B1Iab 82 0
8 HD 20336 Be* 03 19 59.2693390128 +65 39 08.285606820 3.93 4.70 4.85 4.88 5.01 B2.5Vn(e) 226 0
9 * 34 Per * 03 29 22.0494961351 +49 30 32.230623601 4.01 4.610 4.735     B3V 172 0
10 * o Per * 03 42 22.6459308614 +33 57 54.093701142 4.13 4.912 4.972     B0.5V 315 0
11 HD 23060 * 03 43 24.0091284000 +34 06 58.498706844 7.02 7.59 7.48     B2Vp 87 0
12 * omi Per SB* 03 44 19.1337687984 +32 17 17.687367960 3.13 3.91 3.91 3.71 3.71 B1III 628 0
13 HD 23625 SB* 03 47 52.6647098784 +33 35 59.538731964 6.01 6.674 6.653     B3V+B8.5V 135 0
14 HD 24131 * 03 51 53.7187356648 +34 21 32.823349956 4.96 5.730 5.772     B1V 183 0
15 HD 24190 SB* 03 52 18.9579628248 +34 13 19.612811028 6.84 7.46 7.45     B2V 106 0
16 * zet Per s*b 03 54 07.9224751 +31 53 01.081262 2.19 2.97 2.85 2.71 2.62 B1Ib 881 0
17 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 1037 0
18 HD 24640 Ce* 03 56 28.6917914309 +35 04 51.215445412 4.7 5.426 5.488     B1.5V 138 1
19 * eps Per bC* 03 57 51.2393818140 +40 00 36.719213615 1.71 2.71 2.89 2.96 3.14 B0.5III 533 0
20 * ksi Per ** 03 58 57.9024302099 +35 47 27.709515737 3.190 4.080 4.060 3.88 3.89 O7.5III(n)((f)) 850 0
21 V* V490 Per SB* 04 06 39.0433582368 +32 23 06.211533840   7.11 7.0     B3V 88 0
22 * c Per Be* 04 08 39.6935695869 +47 42 45.038007366 3.45 4.00 4.03 3.91 3.93 B3Ve 394 0
23 * b02 Per * 04 20 11.5125754224 +50 55 15.365023320 4.78 5.507 5.545     B1.5IV 98 0
24 * 62 Tau * 04 23 59.7627483096 +24 18 03.527065188 6.18 6.499 6.337     B3V 237 0
25 * tau Tau SB* 04 42 14.6992451952 +22 57 24.850133388   4.138 4.258     B3V 199 0
26 * alf Cam s*b 04 54 03.0113886719 +66 20 33.633625509 3.47 4.34 4.29 4.18 4.18 O9Ia 675 1
27 HD 31327 * 04 56 20.0879684184 +36 10 06.713559372 6.03 6.426 6.089     B2II 96 0
28 V* AE Aur Or* 05 16 18.1493304816 +34 18 44.344404000 5.48 6.18 5.96     O9.5V 597 1
29 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1479 1
30 * tet01 Ori D Y*O 05 35 17.2574479992 -05 23 16.570738104 6.08 6.79 6.70 6.40 6.20 B1.5Vp 340 0
31 HD 37061 Or* 05 35 31.3649044920 -05 16 02.582064192 6.44 7.09 6.83     O9.5V 376 0
32 * eps Ori s*b 05 36 12.81335 -01 12 06.9089 0.48 1.51 1.69 1.76 1.93 B0Ia 921 0
33 * ome Ori Be* 05 39 11.1457980782 +04 07 17.288290296 3.73 4.48 4.59 4.57 4.67 B3Ve 424 1
34 * zet Ori A SB* 05 40 45.527143 -01 56 33.26036   1.79 1.90     O9.2IbvarNwk 680 0
35 * kap Ori s*b 05 47 45.3888404 -09 40 10.577707 0.87 1.88 2.06 2.09 2.27 B0.5Ia 588 0
36 * 139 Tau s*b 05 57 59.6569390499 +25 57 14.083803544 3.82 4.76 4.82 4.76 4.87 B1Ia 290 0
37 * chi02 Ori s*b 06 03 55.1843706432 +20 08 18.428141364 4.24 4.91 4.63 4.32 4.10 B2Ia 465 0
38 * nu. Ori SB* 06 07 34.3251233989 +14 46 06.510739548 3.6 4.240 4.397     B3IV 239 0
39 * 3 Gem s*b 06 09 43.9852949424 +23 06 48.472220448 5.33 5.96 5.75     B2.5Ib 234 0
40 * 9 Gem s*b 06 16 58.7058631680 +23 44 27.284070336 6.31 6.70 6.25 5.78 5.38 B3Iab 253 0
41 HD 46149 Y*O 06 31 52.5319291296 +05 01 59.178678024 7.03 7.80 7.61 7.54 7.36 O8.5V 288 0
42 HD 46966 ** 06 36 25.8880460976 +06 04 59.474397540 5.91 6.83 6.87     O8.5IV 218 0
43 * 15 Mon Be* 06 40 58.65963 +09 53 44.7229 3.360 4.45 4.68   4.88 O7V+B1.5/2V 823 0
44 * r Pup Be* 08 13 29.5172754003 -35 53 58.265647773 3.68 4.66 4.77 4.68 4.77 B1V 199 0
45 * B Vel SB* 08 22 31.69411 -48 29 25.3631 3.83 4.67 4.82 4.86 4.99 B2III 90 0
46 HD 74455 ** 08 42 16.1925159528 -48 05 56.748130241 4.39 5.288 5.468 7.877 7.074 B2/3IV/V 125 0
47 * eta Hya bC* 08 43 13.4757536071 +03 23 55.182801587 3.380 4.100 4.300 4.37 4.56 B3V 418 1
48 HD 85871 Pu* 09 53 00.0928123920 -55 22 23.546251416 5.4 8.90 6.491 7.55   B1IIIn 61 0
49 HD 85980 * 09 54 17.6550610104 -45 17 00.647433708   5.68 5.81     B5V 53 0
50 HD 88661 Be* 10 11 46.4595963216 -58 03 37.958712444 4.77 5.66 5.75 5.66 5.70 B5Vne 161 0
51 * 23 Sex Pu* 10 21 02.0059724664 +02 17 22.997775480 5.9 6.547 6.644     B2IV/V 114 0
52 * rho Leo s*b 10 32 48.6703908997 +09 18 23.705339948 2.780 3.720 3.870 3.90 4.06 B1Iab 550 0
53 HD 92964 s*b 10 42 40.5664557600 -59 12 56.730301164 5.12 5.78 5.51 5.30 5.00 B2.5Ia 155 0
54 HD 99264 * 11 24 11.1271526712 -72 15 23.789086920 5.08 5.585 5.583     B2V 90 0
55 HD 99556 * 11 26 35.4178089456 -61 06 54.603936720 4.88 5.44 5.54     B3III/IV 74 0
56 HD 99872 ** 11 28 18.41395 -72 28 26.3265 5.83 6.221 6.115     B3V 85 0
57 HD 103884 Pu* 11 57 40.0073575296 -62 26 55.494356496   5.400 5.557     B4V 81 0
58 * tet02 Cru SB* 12 04 19.2200768232 -63 09 56.516665140 4.02 4.613 4.716     B3V 106 1
59 * del Cen Be* 12 08 21.4976373 -50 43 20.738614 1.51 2.39 2.52 2.48 2.62 B2Vne 320 0
60 * rho Cen Pu* 12 11 39.1197479712 -52 22 06.384420264 3.20 3.81 3.96 4.05 4.21 B3V 136 0
61 HD 106343 s*b 12 14 16.9257756576 -64 24 30.669334128 5.58 6.292 6.235     B1.5Ia 93 0
62 HD 110432 HXB 12 42 50.2663572384 -63 03 31.052981412 4.79 5.58 5.31     B0.5IVpe 334 0
63 HD 112244 s*b 12 55 57.1336250856 -56 50 08.900570292 4.49 5.33 5.32 5.21 5.21 O8.5Iab(f)p 217 0
64 HD 113120 Be* 13 03 05.3358171458 -71 28 32.642280570 5.21 6.08 6.03     B2IVne 132 0
65 HD 119159 Pu* 13 42 56.1103365744 -56 46 04.686383280   5.92 6.00 7.36   B1/2II 81 0
66 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 182 1
67 * b Cen ** 14 41 57.5905450998 -37 47 36.580200460 3.14 3.83 4.00 4.11 4.26 B2.5V 159 0
68 HD 135160 Be* 15 16 36.6897460558 -60 54 14.399984907 4.76 5.70 5.81     B1/2Vn 101 0
69 * b Sco * 15 50 58.7444628720 -25 45 04.658676984 3.84 4.552 4.635     B1.5Vn 305 0
70 HD 141318 Pu* 15 51 06.8041626360 -55 03 19.928655972 5.13 5.756 5.767 7.08   B2III 93 0
71 * lam Lib SB* 15 53 20.0538968232 -20 10 01.471003716 4.43 4.997 5.027     B3V 223 0
72 * 2 Sco ** 15 53 36.71880 -25 19 37.7087 3.86 4.52 4.59     B2.5Vn 169 0
73 HD 142184 Be* 15 53 55.8637866220 -23 58 41.143370530 4.77 5.352 5.402     B2V 261 1
74 HD 142883 Ce* 15 57 40.4636201088 -20 58 59.082560004   5.839 5.836     B3V 156 0
75 * eta Lup bC? 16 00 07.3279160436 -38 23 48.138224969 2.36 3.19 3.41     B2.5IV 186 0
76 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 776 0
77 * bet01 Sco bC* 16 05 26.2319826 -19 48 19.630018 1.68 2.55 2.62 2.60 2.69 B1V 577 0
78 * ome Sco bC* 16 06 48.4249866846 -20 40 09.079866331 3.10 3.92 3.97 3.91 3.99 B1V 492 0
79 * nu. Sco ** 16 11 59.73568 -19 27 38.5361 3.42 4.05 4.00 3.90 3.87 B2V 404 0
80 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 898 0
81 * chi Oph Be* 16 27 01.4355697915 -18 27 22.499961252 3.95 4.71 4.43 3.97 3.73 B2Vne 624 0
82 HD 148379 s*b 16 29 42.3277745448 -46 14 35.630932596 5.51 5.95 5.37 4.85 4.39 B2Iab 191 0
83 * i Sco * 16 30 12.4752690460 -25 06 54.796568058 3.93 4.72 4.79 4.85 4.99 B2.5V 319 1
84 HD 148688 s*b 16 31 41.7687715992 -41 49 01.732565676 5.16 5.78 5.39 5.05 4.70 B1Iaeqp 170 0
85 * mu. Nor s*b 16 34 05.0193637737 -44 02 43.120603946 4.05 4.99 4.94 6.36   O9.7Iab 286 0
86 HD 149404 s*b 16 36 22.5628499784 -42 51 31.902127776 5.23 5.88 5.52 6.90   O8.5Iab(f)p 265 0
87 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1908 0
88 V* V1003 Sco Pu* 16 38 26.2919895528 -43 23 54.328921872 5.2 5.81 5.83     B2V 88 0
89 HD 150168 s*b 16 41 40.2261742224 -49 39 05.588433432 4.88 5.67 5.68 5.64 5.60 B1Iab/Ib 94 0
90 HD 150745 * 16 46 21.2258832984 -58 30 12.943454616   5.618 5.728     B2III/IV 55 0
91 HD 150898 s*b 16 47 19.6583362032 -58 20 29.199122664 4.70 5.55 5.61 5.61 5.62 B0Ib 138 0
92 HD 151804 s*b 16 51 33.7218052272 -41 13 49.919519496 4.45 5.29 5.22     O8Iaf 389 0
93 * zet01 Sco s*b 16 53 59.7271314888 -42 21 43.307334468 4.80 5.31 4.79 4.32 3.86 B1.5Ia+ 390 0
94 HD 152478 Be* 16 56 08.8420101600 -50 40 29.242895268 5.64 6.31 6.33     B3Vnpe 96 0
95 V* V861 Sco SB* 16 56 35.9776521336 -40 49 24.443276592 5.86 6.51 6.22 5.92 5.64 B2Iab/b 229 0
96 * k Sco s*b 17 04 49.3516568736 -34 07 22.541680380 4.44 5.13 4.87 4.59 4.42 B2Iab 158 0
97 HD 154445 * 17 05 32.2587926880 -00 53 31.437713328 5.10 5.73 5.61 5.39 5.34 B1V 276 0
98 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 316 0
99 HD 155806 Be* 17 15 19.2478670712 -33 32 54.299379012 4.61 5.52 5.53     O7.5V((f))z(e) 240 0
100 * u Her SB* 17 17 19.5678148944 +33 06 00.368380044 3.87 4.63 4.80     B2V 242 1
101 HD 159176 Be* 17 34 42.4921337376 -32 34 53.995451196 4.88 5.74 5.70 7.19   O7V 261 0
102 * iot Her bC* 17 39 27.8868980278 +46 00 22.792978043 2.940 3.630 3.800     B3IV 470 1
103 HD 161056 * 17 43 47.0221609752 -07 04 46.594311996 6.26 6.68 6.32 5.94 5.67 B3II/III 201 0
104 V* V2052 Oph bC* 17 56 18.4001168880 +00 40 13.273317228 5.28 5.874 5.820     B3III 222 0
105 * 66 Oph Be* 18 00 15.7957050537 +04 22 07.122326765 3.77 4.58 4.60 4.47 4.49 B2Ve 358 0
106 * 96 Her SB* 18 02 23.0471258304 +20 50 01.086774072 4.57 5.141 5.249     B3IV 108 0
107 * 102 Her * 18 08 45.4919267342 +20 48 52.404584093 3.38 4.177 4.347     B2IV 194 0
108 HD 167971 s*b 18 18 05.8947362832 -12 14 33.313601112 7.89 8.27 7.50 6.68 6.279 O8Iaf(n)+O4/5 324 0
109 * 20 Aql V* 19 12 40.7117853648 -07 56 22.263784872 5.03 5.47 5.34     B2/3II 240 0
110 * 2 Vul Pu* 19 17 43.6353905520 +23 01 31.941802308 4.64 5.43 5.43     B1IIIn 146 0
111 * 2 Cyg ** 19 24 07.5783613224 +29 37 16.808049156 4.16 4.851 4.977     B3/4+B6/9 133 0
112 * kap Aql * 19 36 53.4488871022 -07 01 38.924816492 4.050 4.930 4.960 4.90 4.94 B0.5IIIn 354 0
113 HD 185859 Em* 19 40 28.3246282752 +20 28 37.474738716 6.290 6.890 6.520 6.18 5.92 B3I+ 145 0
114 V* V1765 Cyg SB* 19 48 50.5979466384 +33 26 14.222537016 5.99 6.578 6.463     B0.5II 151 0
115 * 12 Vul Be* 19 51 04.1083085616 +22 36 36.172997964 4.15 4.84 4.96 4.98 5.12 B2.5Ve 192 0
116 HD 188209 s*b 19 51 59.0687638680 +47 01 38.419078944 4.61 5.55 5.63 5.54 5.64 O9.5Iab 322 0
117 HD 190429 ** 20 03 29.39885 +36 01 30.5082 5.98 6.78 6.63     O4If+O9.5II 209 0
118 HD 190603 s*b 20 04 36.1742825304 +32 13 06.953333016 5.73 6.19 5.65 5.13 4.71 B1.5Ia+ 357 0
119 HD 191781 s*b 20 09 50.5814420544 +45 24 10.486830312 10.1 10.06 9.53     ON9.7Iab 71 0
120 * P Cyg s*b 20 17 47.2019733389 +38 01 58.549132671 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1200 1
121 HD 194279 s*b 20 23 18.1647782064 +40 45 32.598481500 8.01 8.04 7.01 5.98 5.17 B2Ia 200 0
122 HD 194280 s*b 20 23 26.3118358272 +38 56 21.030835740 8.94 9.08 8.42     OC9.7Iab 78 0
123 HD 194839 s*b 20 26 21.5475791160 +41 22 45.646427280 8.40 8.49 7.49     B0.5Ia 120 0
124 HD 195592 s*b 20 30 34.9690901208 +44 18 54.859533372 7.75 7.95 7.08 6.29 5.60 O9.7Ia 221 1
125 * 55 Cyg s*b 20 48 56.2915921440 +46 06 50.883645024 4.83 5.28 4.86 4.41 4.10 B2.5Ia 506 0
126 * f01 Cyg Be* 20 59 49.5541247496 +47 31 15.363746436 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 514 0
127 HD 201345 * 21 07 55.4150161776 +33 23 49.228548972   7.611 7.764     ON9.2IV 186 0
128 HD 202214 ** 21 11 48.23752 +59 59 11.8024 4.97         O9.5IV 150 0
129 * ups Cyg Be* 21 17 55.0858548408 +34 53 48.825463560 3.50 4.32 4.42 4.37 4.45 B2Vne 321 0
130 * 68 Cyg SB* 21 18 27.1862219256 +43 56 45.399147864 4.05 4.99 5.00     O7.5IIIn((f)) 383 0
131 HD 203374 Be* 21 19 07.3685524992 +61 51 30.436799148 6.23 6.908 6.674     B0IVpe 135 0
132 HD 203938 ** 21 23 50.1690416971 +47 09 52.446883103 7.13 7.54 7.08     B0.5IV 108 0
133 HD 204827 SB* 21 28 57.7592315784 +58 44 23.238427956 8.63 8.74 7.94 7.25 6.76 O9.5IV 372 0
134 HD 205139 * 21 30 59.2916490744 +60 27 33.954560208 4.92 5.604 5.522     B1Ib 104 0
135 * 9 Cep s*b 21 37 55.2241394424 +62 04 54.990376788 4.49 5.03 4.73 4.42 4.24 B2Ib 315 0
136 HD 206267 Y*O 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 520 0
137 HD 207198 Y*? 21 44 53.2791389640 +62 27 38.048647248 5.61 6.25 5.94 5.66 5.49 O8.5II 365 0
138 HD 207538 * 21 47 39.7896725544 +59 42 01.348647696 7 7.55 7.30     O9.7IV 213 1
139 * 14 Cep SB* 22 02 04.5726270264 +58 00 01.309758516 4.77 5.551 5.542     O9IV(n)var+B1:V: 262 0
140 * 19 Cep * 22 05 08.7897533088 +62 16 47.332569936 4.36 5.19 5.11 4.95 4.92 O9Ib 397 0
141 * lam Cep s*b 22 11 30.5765111040 +59 24 52.154264880 4.55 5.29 5.05 4.77 4.62 O6.5I(n)fp 705 1
142 * 26 Cep s*b 22 27 05.3104700184 +65 07 56.160347196 5.24 5.806 5.515     B0.5Ib 157 0
143 * 10 Lac ** 22 39 15.6786372 +39 03 00.971152 3.650 4.670 4.880 4.98 5.19 O9V 790 0
144 * 14 Lac EB* 22 50 21.7785565224 +41 57 12.221400240 5.49 5.961 5.910     B4III 155 0
145 HD 217086 Y*O 22 56 47.1887590800 +62 43 37.657173900 7.88 8.30 7.66 8.35   O7Vnn((f))z 263 0
146 HD 219287 s*b 23 14 03.5236926792 +59 22 29.011016316 10.12 10.30 9.23 8.29 7.57 B0.5Ia 61 0
147 * sig Cas ** 23 59 00.53819 +55 45 17.7430           B1V 154 0
148 NAME Local Bubble ISM ~ ~           ~ 1059 0

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