2007PASP..119.1268W


Query : 2007PASP..119.1268W

2007PASP..119.1268W - Publ. Astron. Soc. Pac., 119, 1268-1277 (2007/November-0)

A preliminary investigation of the diffuse interstellar line at 8621 Å.

WALLERSTEIN G., SANDSTROM K. and GREDEL R.

Abstract (from CDS):

We have obtained high-resolution spectra at the Dominion Astrophysical Observatory, the Calar Alto Observatory, and the European Southern Observatory of hot stars in the near-infrared region to study the diffuse interstellar band (DIB) at 8621 Å. Field stars as well as selected members of the Perseus spiral arm, the ρ Ophiuchi complex, and the Cygnus OB2 association were observed and the equivalent widths of the band measured, as well as interstellar K I absorption at 7699 Å. In total we measure the equivalent width of the 8621 band in 64 stars. In a series of figures we show the correlations of the DIB with reddening, polarization, K I, and strengths of other DIBs at 5780, 5797, and 6613 Å. The quality of the correlations are discussed by means of the Spearman rank correlation test. Good correlations are found with reddening and, among the other DIBs, 8621 correlates best with 5780. By examining the three special regions mentioned above we confirm the weakness of the 8621 DIB in the hot stars of the ρ Oph star-forming region. In the Perseus spiral arm region we find that the DIBs are formed largely in foreground clouds but not in the gas that appears to have been blown away from the young massive stars of the Perseus arm. In Cyg OB2 we find that the equivalent widths of the 8621 line lie above the linear correlation of equivalent width with E(B-V) and their strength does not vary as strongly with reddening. The heavily reddened Cyg OB2 star 12 is the most extreme example of the relative insensitivity of the 8621 equivalent width to reddening in the Cygnus OB2 region.

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Journal keyword(s): Stars

Simbad objects: 65

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Number of rows : 65
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 BD+66 1674 * 00 02 10.2414638448 +67 25 45.186308256 10.76 10.67 9.60     O9.7IV 42 0
2 BD+66 1675 * 00 02 10.2887046096 +67 24 32.228861796 10.18 10.16 9.08     O7.5Vz 85 0
3 HD 225094 s*b 00 03 25.7141331 +63 38 25.877987 6.01 6.56 6.22 5.90 5.67 B2.9Iab 144 0
4 * kap Cas s*b 00 32 59.9911963 +62 55 54.417374 3.50 4.30 4.16 4.02 3.96 B1Ia 456 0
5 V* V486 Cas SB* 00 42 37.9892695464 +52 20 13.745241132   6.993 6.946     B1III 57 0
6 HD 8065 sg* 01 23 46.8016857216 +78 43 33.808282104   6.411 6.064     B9Iab 22 0
7 HD 14433 sg* 02 21 55.4354619696 +57 14 34.499997492 7.01 6.97 6.4800 5.79 6.7332 A1Ia 147 0
8 BD+60 493 s*b 02 30 51.3556566000 +61 10 39.975724344 10.571 9.12 8.48     B0.5Iae 66 0
9 HD 15497 s*b 02 31 53.3760247896 +57 41 51.509327532 7.73 7.80 7.02 6.31 5.70 B7Ia 129 0
10 HD 16310 * 02 39 23.0293856904 +59 03 59.451289416 10.026 8.64 8.10     B1II: 46 0
11 HD 17378 sg* 02 49 30.7369299096 +57 05 03.548427576 7.65 7.14 6.26 5.44 4.68 A5Ia 174 0
12 HD 21291 s*b 03 29 04.1328896160 +59 56 25.201164588 4.40 4.63 4.22 3.84 3.46 B9Ia 285 0
13 HD 21389 sg* 03 29 54.7436040912 +58 52 43.496880384 4.99 5.10 4.54 4.03 3.53 A0Ia 292 0
14 * zet Per V* 03 54 07.9224751 +31 53 01.081262 2.19 2.97 2.85 2.71 2.62 B1Ib 832 0
15 * alf Cam s*b 04 54 03.0103983 +66 20 33.636467 3.47 4.34 4.29 4.18 4.18 O9Ia 647 1
16 V* AE Aur Or* 05 16 18.1493304816 +34 18 44.344404000 5.48 6.18 5.96     O9.5V 541 1
17 * chi02 Ori s*b 06 03 55.1843706432 +20 08 18.428141364 4.24 4.91 4.63 4.32 4.10 B2Ia 438 0
18 HD 42088 * 06 09 39.5728368936 +20 29 15.450599580 6.73 7.58 7.57 8.45   O6V((f))z 237 0
19 * 3 Gem s*b 06 09 43.9852949424 +23 06 48.472220448 5.33 5.96 5.75     B3Ia 223 0
20 HD 42379 Em* 06 11 18.0850174224 +21 33 49.629883824 7.21 7.68 7.43     B1II 60 0
21 * 9 Gem s*b 06 16 58.7058631680 +23 44 27.284070336 6.31 6.70 6.25 5.78 5.38 B3Iab 232 0
22 HD 43837 Pu* 06 19 16.8790133928 +20 34 47.755106652 8.82 8.99 8.49     B2Ibp? 39 1
23 HD 61827 * 07 39 49.3378796760 -32 34 42.134435760 7.91 9.52 8.20 8.19   O8/9(Ib) 76 0
24 CD-32 4348 s*b 07 44 26.4304420296 -33 13 18.599967768 10.11 10.05 9.19 9.30   B3Ia 39 0
25 CD-33 4141 * 07 47 13.1506505880 -33 20 30.035551920 11.11 11.15 9.88 9.72   B2.5I: 19 0
26 HD 75149 s*b 08 46 30.5469120768 -45 54 45.019158300 5.25 5.677 5.459 6.77   B5Iab 103 0
27 CD-44 4865 * 08 50 02.2858329192 -44 34 39.926878500 9.88 10.16 9.63 9.67   B0III 50 0
28 HD 75860 s*b 08 50 53.24063 -43 45 05.4358 8.05 8.30 7.58 6.83 6.23 B1.5Iabp 84 0
29 CD-46 4786 * 08 56 55.8413690424 -47 02 45.526396776 9.71 9.95 9.49 9.47   B1Ib 38 0
30 HD 80077 s*b 09 15 54.7869062472 -49 58 24.575734452 10.50 10.29 9.00 7.89   B2Ia+e 134 0
31 HD 110639 * 12 44 17.0839955616 -61 23 40.699619844 8.90 9.15 8.46 9.01   B1II-III 44 0
32 * kap Cru SB* 12 53 48.9198156672 -60 22 34.469837436 5.62 6.12 5.94 7.12   B2/3Ia 124 0
33 HD 113422 * 13 04 36.8521601136 -61 42 37.014895224 8.87 9.07 8.24 9.04   B1/2Ia/ab 64 0
34 HD 113432 Em* 13 04 49.3221518976 -63 29 29.249057472 9.4 9.70 9.19 9.40   B1Ib 41 0
35 HD 114011 * 13 08 43.0570687992 -61 11 10.964598612 9.8 10.08 9.36 9.59   B3/5Ib/II 48 0
36 HD 114213 * 13 10 21.3701195472 -61 28 20.891598132 9.86 9.88 8.96 9.40   B1Ib 74 0
37 HD 147196 Be* 16 21 19.1910323616 -23 42 28.738330020 7.04 7.21 7.04     B5/8Vn 95 0
38 HD 147888 ** 16 25 24.2915998776 -23 27 36.747568152 6.71 7.05 6.74     B3/4V 205 0
39 HD 147889 Y*O 16 25 24.3163637976 -24 27 56.569805208 8.56 8.73 7.90     B2III/IV 454 1
40 * rho Oph B * 16 25 35.0324153856 -23 26 46.923516744   5.26 6.66     B2V 123 0
41 HD 147932 Ro* 16 25 35.0813422344 -23 24 18.806143896 7.24 7.59 7.27     B5V 115 0
42 HD 166734 s*b 18 12 24.6551425392 -10 43 53.060750040 9.36 9.49 8.42 7.33 6.47 O7.5Iabf 168 0
43 HD 168607 s*b 18 21 14.8856951904 -16 22 31.763755236 10.23 9.82 8.28 8.55   B9Iaep 182 1
44 HD 169454 s*b 18 25 15.1937863728 -13 58 42.309359544 7.39 7.61 6.71 5.82 5.13 B1Ia 323 0
45 HD 172028 SB* 18 37 56.6190511992 -00 23 09.066384996   8.39 7.92     B3II/III 51 1
46 HD 183143 s*b 19 27 26.5636061496 +18 17 45.193019136 8.25 8.08 6.86 5.74 4.79 B6Ia 423 0
47 HD 190603 s*b 20 04 36.1742825304 +32 13 06.953333016 5.73 6.19 5.65 5.13 4.71 B1.5Ia 333 0
48 HD 195592 s*b 20 30 34.9690901208 +44 18 54.859533372 7.75 7.95 7.08 6.29 5.60 O9.7Ia 202 1
49 BD+40 4220 SB* 20 32 22.4238075360 +41 18 18.942475932 11.32 10.79 9.185     O6.5:Iafe 383 0
50 Schulte 12 s*b 20 32 40.9572199728 +41 14 29.279036940 16.1 14.45 11.702     B3-4Ia+ 393 0
51 Schulte 9 s*b 20 33 10.7362926720 +41 15 08.222370372 13.38 12.77 10.96     O4.5If 216 0
52 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 875 0
53 Schulte 7 * 20 33 14.1095938872 +41 20 21.904113804 12.24 12.00 10.55     O3If* 138 0
54 BD+40 4227A SB* 20 33 15.0781182864 +41 18 50.479292556 10.42 10.27 8.98 8.03 6.83 O6Ib(fc)+O4.5:III:(fc) 223 0
55 BD+41 3807 SB* 20 34 08.5147948176 +41 36 59.408503092 11.74 11.52 10.03     O5.5Ifc 120 0
56 * 55 Cyg s*b 20 48 56.2915921440 +46 06 50.883645024 4.83 5.28 4.86 4.41 4.10 B4Ia 483 0
57 HD 199478 s*b 20 55 49.8039729168 +47 25 03.564093468 5.79 6.12 5.64 5.16 4.78 B8Ia 220 0
58 * 13 Cep V* 21 54 53.1538880928 +56 36 40.415024952 6.50 6.52 5.80 5.12 4.52 B8Ib 182 0
59 * 10 Lac ** 22 39 15.6786372 +39 03 00.971152 3.650 4.670 4.880 4.98 5.19 O9V 735 0
60 HD 219287 Em* 23 14 03.5236926792 +59 22 29.011016316 10.12 10.30 9.23 8.29 7.57 B0 53 0
61 BD+62 2210 * 23 18 32.9069075424 +63 30 05.149601280 9.89 9.57 8.42     B0 29 0
62 * 6 Cas ** 23 48 50.17052 +62 12 52.2577       6.60   A2.5(I)+O9.8II 185 0
63 HD 224055 Em* 23 54 42.1155968568 +61 50 20.036841432 7.67 7.846 7.233     B3Ia 89 0
64 V* V373 Cas SB* 23 55 33.8386958472 +57 24 43.807358448 5.49 6.21 6.00     B0.5II-III 145 0
65 BD+66 1661 * 23 57 32.6036981472 +67 33 15.293987460 9.33 9.41 8.76     O9.2V 58 0

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2022.07.06-08:27:14

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