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 - 2024 		#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 462 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 1209 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 571 0
4 HD 13256 s*b 02 11 43.9098216480 +60 42 44.500379976 9.8 9.69 8.68     B1Ia(+) 67 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 213 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 240 0
7 HD 15785 s*b 02 34 48.0522508344 +60 33 07.449247908 10.033 8.82 8.37     B1Iab 76 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) 219 0
9 * 34 Per * 03 29 22.0494961351 +49 30 32.230623601 4.01 4.610 4.735     B3V 163 0
10 * o Per * 03 42 22.6459308614 +33 57 54.093701142 4.13 4.912 4.972     B0.5V 299 0
11 HD 23060 * 03 43 24.0091284000 +34 06 58.498706844 7.02 7.59 7.48     B2Vp 82 0
12 * omi Per ** 03 44 19.13204 +32 17 17.6929 3.13 3.88 3.83 3.71 3.71 B1III 605 0
13 HD 23625 SB* 03 47 52.6647098784 +33 35 59.538731964 6.01 6.674 6.653     B3V+B8.5V 128 0
14 HD 24131 * 03 51 53.7187356648 +34 21 32.823349956 4.96 5.730 5.772     B1V 172 0
15 HD 24190 SB* 03 52 18.9579628248 +34 13 19.612811028 6.84 7.46 7.45     B2V 96 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 856 0
17 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 978 0
18 HD 24640 Ce* 03 56 28.6917914309 +35 04 51.215445412 4.7 5.426 5.488     B1.5V 133 1
19 * eps Per bC* 03 57 51.2320472 +40 00 36.775143 1.71 2.71 2.89 2.96 3.14 B0.5III 519 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)) 832 0
21 V* V490 Per EB* 04 06 39.0433582368 +32 23 06.211533840   7.11 7.0     B3V 82 0
22 * c Per Be* 04 08 39.6935695869 +47 42 45.038007366 3.45 4.00 4.03 3.91 3.93 B3Ve 382 0
23 * b02 Per EB* 04 20 11.5125754224 +50 55 15.365023320 4.78 5.507 5.545     B1.5IV 93 0
24 * 62 Tau * 04 23 59.7627483096 +24 18 03.527065188 6.18 6.499 6.337     B3V 218 0
25 * tau Tau SB* 04 42 14.6992451952 +22 57 24.850133388   4.138 4.258     B3V 192 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 661 1
27 HD 31327 * 04 56 20.0879684184 +36 10 06.713559372 6.03 6.426 6.089     B2.5Ib 89 0
28 V* AE Aur Or* 05 16 18.1493304816 +34 18 44.344404000 5.48 6.18 5.96     O9.5V 564 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 1405 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 328 0
31 HD 37061 Or* 05 35 31.3649044920 -05 16 02.582064192 6.44 7.09 6.83     O9.5V 355 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 896 0
33 * ome Ori Be* 05 39 11.1457980782 +04 07 17.288290296 3.73 4.48 4.59 4.57 4.67 B3Ve 408 1
34 * zet Ori A SB* 05 40 45.527143 -01 56 33.26036   1.79 1.90     O9.2IbvarNwk 666 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 569 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 281 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 450 0
38 * nu. Ori SB* 06 07 34.3251233989 +14 46 06.510739548 3.6 4.240 4.397     B3IV 230 0
39 * 3 Gem s*b 06 09 43.9852949424 +23 06 48.472220448 5.33 5.96 5.75     B3Ia 226 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 241 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 277 0
42 HD 46966 ** 06 36 25.8880460976 +06 04 59.474397540 5.91 6.83 6.87     O8.5IV 207 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 803 0
44 * r Pup Be* 08 13 29.5172754003 -35 53 58.265647773 3.68 4.66 4.77 4.68 4.77 B1V 188 0
45 * B Vel SB* 08 22 31.69411 -48 29 25.3631 3.83 4.67 4.82 4.86 4.99 B2III 87 0
46 V* HX Vel EB* 08 42 16.1925159528 -48 05 56.748130241 4.39 5.288 5.468 7.877 7.074 B2/3IV/V 122 0
47 * eta Hya bC* 08 43 13.4757536071 +03 23 55.182801587 3.380 4.100 4.300 4.37 4.56 B3V 405 1
48 HD 85871 Pu* 09 53 00.0928123920 -55 22 23.546251416 5.4 8.90 6.491 7.55   B1IIIn 58 0
49 HD 85980 * 09 54 17.6550610104 -45 17 00.647433708   5.68 5.81     B5V 50 0
50 HD 88661 Be* 10 11 46.4595963216 -58 03 37.958712444 4.77 5.66 5.75 5.66 5.70 B5Vne 152 0
51 * 23 Sex Pu* 10 21 02.0059724664 +02 17 22.997775480 5.9 6.547 6.644     B2IV/V 108 0
52 * rho Leo s*b 10 32 48.6703908997 +09 18 23.705339948 2.780 3.720 3.870 3.90 4.06 B1IbNstr 532 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 148 0
54 HD 99264 * 11 24 11.1271526712 -72 15 23.789086920 5.08 5.585 5.583     B2V 82 0
55 HD 99556 * 11 26 35.4178089456 -61 06 54.603936720 4.88 5.44 5.54     B3III/IV 69 0
56 HD 99872 ** 11 28 18.41395 -72 28 26.3265 5.83 6.221 6.115     B3V 81 0
57 HD 103884 Pu* 11 57 40.0073575296 -62 26 55.494356496   5.400 5.557     B4V 78 0
58 * tet02 Cru SB* 12 04 19.2200768232 -63 09 56.516665140 4.02 4.613 4.716     B3V 101 1
59 * del Cen Be* 12 08 21.4976373 -50 43 20.738614 1.51 2.39 2.52 2.48 2.62 B2Vne 309 0
60 * rho Cen Pu* 12 11 39.1197479712 -52 22 06.384420264 3.20 3.81 3.96 4.05 4.21 B3V 130 0
61 HD 106343 s*b 12 14 16.9257756576 -64 24 30.669334128 5.58 6.292 6.235     B1.5Ia 88 0
62 HD 110432 HXB 12 42 50.2663572384 -63 03 31.052981412 4.79 5.58 5.31     B0.5IVpe 311 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 207 0
64 HD 113120 Be* 13 03 05.3358171458 -71 28 32.642280570 5.21 6.08 6.03     B2IVne 124 0
65 HD 119159 Pu* 13 42 56.1103365744 -56 46 04.686383280   5.92 6.00 7.36   B1/2II 77 0
66 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 174 1
67 * b Cen ** 14 41 57.5905450998 -37 47 36.580200460 3.14 3.83 4.00 4.11 4.26 B2.5V 145 0
68 HD 135160 Be* 15 16 36.6897460558 -60 54 14.399984907 4.76 5.70 5.81     B1/2Vn 95 0
69 * b Sco * 15 50 58.7444628720 -25 45 04.658676984 3.84 4.552 4.635     B1.5Vn 291 0
70 HD 141318 Pu* 15 51 06.8041626360 -55 03 19.928655972 5.13 5.756 5.767 7.08   B2III 88 0
71 * lam Lib SB* 15 53 20.0538968232 -20 10 01.471003716 4.43 4.997 5.027     B3V 211 0
72 * 2 Sco ** 15 53 36.71880 -25 19 37.7087 3.86 4.52 4.59     B2.5Vn 159 0
73 HD 142184 Be* 15 53 55.8637866220 -23 58 41.143370530 4.77 5.352 5.402     B2V 232 0
74 HD 142883 Ce* 15 57 40.4636201088 -20 58 59.082560004   5.839 5.836     B3V 145 0
75 * eta Lup bC? 16 00 07.3279160436 -38 23 48.138224969 2.36 3.19 3.41     B2.5IV 166 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 740 0
77 * bet01 Sco bC* 16 05 26.2319826 -19 48 19.630018 1.68 2.55 2.62 2.60 2.69 B1V 561 0
78 * ome Sco bC* 16 06 48.4249866846 -20 40 09.079866331 3.10 3.92 3.97 3.91 3.99 B1V 470 0
79 * nu. Sco ** 16 11 59.73568 -19 27 38.5361 3.42 4.05 4.00 3.90 3.87 B2V 381 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 870 0
81 * chi Oph Be* 16 27 01.4355697915 -18 27 22.499961252 3.95 4.71 4.43 3.97 3.73 B2Vne 598 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 180 0
83 * i Sco * 16 30 12.4752690460 -25 06 54.796568058 3.93 4.72 4.79 4.85 4.99 B3V 304 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 162 0
85 * mu. Nor s*b 16 34 05.0193637737 -44 02 43.120603946 4.05 4.99 4.94 6.36   O9.7Iab 275 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 249 1
87 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1839 0
88 V* V1003 Sco Pu* 16 38 26.2919895528 -43 23 54.328921872 5.2 5.81 5.83     B2V 79 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 88 0
90 HD 150745 * 16 46 21.2258832984 -58 30 12.943454616   5.618 5.728     B2III/IV 49 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 131 0
92 HD 151804 s*b 16 51 33.7218052272 -41 13 49.919519496 4.45 5.29 5.22     O8Iaf 376 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+ 372 0
94 HD 152478 Be* 16 56 08.8420101600 -50 40 29.242895268 5.64 6.31 6.33     B3Vnpe 88 0
95 V* V861 Sco EB* 16 56 35.9776521336 -40 49 24.443276592 5.86 6.51 6.22 5.92 5.64 B2Iab/b 221 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 151 0
97 HD 154445 * 17 05 32.2587926880 -00 53 31.437713328 5.10 5.73 5.61 5.39 5.34 B1V 262 0
98 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 294 0
99 HD 155806 Be* 17 15 19.2478670712 -33 32 54.299379012 4.61 5.52 5.53     O7.5V((f))z(e) 229 0
100 * u Her EB* 17 17 19.5678148944 +33 06 00.368380044 3.87 4.63 4.80     B2V 237 1
101 HD 159176 Be* 17 34 42.4921337376 -32 34 53.995451196 4.88 5.74 5.70 7.19   O7V 254 0
102 * iot Her bC* 17 39 27.8868980278 +46 00 22.792978043 2.940 3.630 3.800     B3IV 448 1
103 HD 161056 * 17 43 47.0221609752 -07 04 46.594311996 6.26 6.68 6.32 5.94 5.67 B3II/III 189 0
104 V* V2052 Oph bC* 17 56 18.4001168880 +00 40 13.273317228 5.28 5.874 5.820     B3III 214 0
105 * 66 Oph Be* 18 00 15.7957050537 +04 22 07.122326765 3.77 4.58 4.60 4.47 4.49 B2Ve 347 0
106 * 96 Her SB* 18 02 23.0471258304 +20 50 01.086774072 4.57 5.141 5.249     B3IV 103 0
107 * 102 Her * 18 08 45.4919267342 +20 48 52.404584093 3.38 4.177 4.347     B2IV 185 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)+O4/5 297 0
109 * 20 Aql V* 19 12 40.7117853648 -07 56 22.263784872 5.03 5.47 5.34     B2/3II 231 0
110 * 2 Vul Pu* 19 17 43.6353905520 +23 01 31.941802308 4.64 5.43 5.43     B3IV+ 139 1
111 * 2 Cyg * 19 24 07.5783613224 +29 37 16.808049156 4.16 4.851 4.977     B3IV 128 0
112 * kap Aql * 19 36 53.4488871022 -07 01 38.924816492 4.050 4.930 4.960 4.90 4.94 B0.5IIIn 341 0
113 HD 185859 Em* 19 40 28.3246282752 +20 28 37.474738716 6.290 6.890 6.520 6.18 5.92 B3I+ 139 0
114 V* V1765 Cyg EB* 19 48 50.5979466384 +33 26 14.222537016 5.99 6.578 6.463     B0.5II 144 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 187 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 310 0
117 HD 190429 ** 20 03 29.39885 +36 01 30.5082 5.98 6.78 6.63     O4If+O9.5II 203 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+ 344 0
119 HD 191781 s*b 20 09 50.5814420544 +45 24 10.486830312 10.1 10.06 9.53     ON9.7Iab 65 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 1177 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 191 0
122 HD 194280 s*b 20 23 26.3118358272 +38 56 21.030835740 8.94 9.08 8.42     OC9.7Iab 76 0
123 HD 194839 Em* 20 26 21.5475791160 +41 22 45.646427280 8.40 8.49 7.49     B0.5Iae 116 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 210 1
125 * 55 Cyg s*b 20 48 56.2915921440 +46 06 50.883645024 4.83 5.28 4.86 4.41 4.10 B4Ia 493 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 502 0
127 HD 201345 * 21 07 55.4150161776 +33 23 49.228548972   7.611 7.764     ON9.2IV 174 0
128 HD 202214 ** 21 11 48.23752 +59 59 11.8024 4.97         O9.5IV 144 0
129 * ups Cyg Be* 21 17 55.0858548408 +34 53 48.825463560 3.50 4.32 4.42 4.37 4.45 B2Vne 315 0
130 * 68 Cyg SB* 21 18 27.1862219256 +43 56 45.399147864 4.05 4.99 5.00     O7.5IIIn((f)) 374 0
131 HD 203374 Be* 21 19 07.3685524992 +61 51 30.436799148 6.23 6.908 6.674     B0IVpe 130 0
132 HD 203938 ** 21 23 50.1690416971 +47 09 52.446883103 7.13 7.54 7.08     B0.5IV 99 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 355 0
134 HD 205139 * 21 30 59.2916490744 +60 27 33.954560208 4.92 5.604 5.522     B1Ib 98 0
135 * 9 Cep Pu* 21 37 55.2241394424 +62 04 54.990376788 4.49 5.03 4.73 4.42 4.24 B2Ib 301 0
136 HD 206267 SB* 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 499 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 347 0
138 HD 207538 * 21 47 39.7896725544 +59 42 01.348647696 7 7.55 7.30     O9.7IV 198 1
139 * 14 Cep SB* 22 02 04.5726270264 +58 00 01.309758516 4.77 5.551 5.542     O9IV(n)var+B1:V: 255 0
140 * 19 Cep * 22 05 08.7897533088 +62 16 47.332569936 4.36 5.19 5.11 4.95 4.92 O9Ib 380 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 684 1
142 * 26 Cep * 22 27 05.3104700184 +65 07 56.160347196 5.24 5.806 5.515     B0.5Ib 149 0
143 * 10 Lac ** 22 39 15.6786372 +39 03 00.971152 3.650 4.670 4.880 4.98 5.19 O9V 758 0
144 * 14 Lac EB* 22 50 21.7785565224 +41 57 12.221400240 5.49 5.961 5.910     B4+F9III 149 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 255 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 57 0
147 * sig Cas ** 23 59 00.53819 +55 45 17.7430           B1V 151 0
148 NAME Local Bubble ISM ~ ~           ~ 900 0

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