2021A&A...656L..17S


Query : 2021A&A...656L..17S

2021A&A...656L..17S - Astronomy and Astrophysics, volume 656, L17-17 (2021/12-1)

C60+ diffuse interstellar band correlations and environmental variations.

SCHLARMANN L., FOING B., CAMI J. and FAN H.

Abstract (from CDS):


Context. The diffuse interstellar bands (DIBs) are absorption features seen in the spectra of astronomical objects that arise in the interstellar medium. Today, more than 500 DIBs have been observed, mostly in the optical and near-infrared wavelengths. The origin of the DIBs is unclear; only ionised buckminsterfullerene, C60+, has been identified as a viable candidate for two strong and three weaker DIBs.
Aims. We investigate the correlations between the strengths of the two strongest C60+ DIBs as well as their environmental behaviour.
Methods. We analysed measurements of the strengths of the two C60+ DIBs at 9577 and 9633 Å for 26 lines of sight. We used two different methods, including Monte Carlo simulations, to study their correlations and the influence of measurement errors on the correlation coefficients. We examined how the strength of the C60+ DIBs changes as a result of different environmental conditions, as measured by the concentration of H/H2 and the strength of the ambient UV radiation.
Results. In contrast to results recently reported by Galazutdinov et al. (2021AJ....161..127G), we find a high correlation between the strengths of the C60+ DIBs. We also discovered that the behaviour of the correlated C60+ bands is quite distinct from other DIBs at 5780, 5797, and 6203 Å in different environments.

Abstract Copyright: © ESO 2021

Journal keyword(s): ISM: lines and bands - ISM: molecules - ISM: clouds - dust, extinction

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 * o Per * 03 42 22.6455526 +33 57 54.089323 4.13 4.912 4.972     B0.5V 293 0
2 * omi Per ** 03 44 19.13204 +32 17 17.6929 3.13 3.88 3.83 3.71 3.71 B1III 590 0
3 * 62 Tau * 04 23 59.7627483096 +24 18 03.527065188 6.18 6.499 6.337     B3V 209 0
4 * lam Ori A Em* 05 35 08.2760807112 +09 56 02.991326316 2.17 3.48 3.47     O8III((f)) 498 0
5 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1368 1
6 * 139 Tau Em* 05 57 59.6563212 +25 57 14.079839 3.82 4.76 4.82 4.76 4.87 B0/1II/III 274 0
7 * 9 Gem s*b 06 16 58.7058631680 +23 44 27.284070336 6.31 6.70 6.25 5.78 5.38 B3Iab 236 0
8 HD 54662 SB* 07 09 20.2493151288 -10 20 47.635088964 5.35 6.24 6.21 7.23   O6.5Vz(n)+O7.5Vz 334 2
9 * tau CMa SB* 07 18 42.4864191 -24 57 15.741299 3.26 4.25 4.40 4.44 4.62 O9II 412 0
10 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 723 0
11 * ome Sco bC* 16 06 48.4269211 -20 40 09.090235 3.10 3.92 3.97 3.91 3.99 B1V 461 0
12 * nu. Sco ** 16 11 59.73568 -19 27 38.5361 3.42 4.05 4.00 3.90 3.87 B2V 368 0
13 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 854 0
14 HD 147889 Y*O 16 25 24.3163637976 -24 27 56.569805208 8.56 8.73 7.90     B2V 461 1
15 * i Sco * 16 30 12.4751393 -25 06 54.804270 3.93 4.72 4.79 4.85 4.99 B3V 299 1
16 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1806 2
17 HD 167971 s*b 18 18 05.8947362832 -12 14 33.313601112 7.89 8.27 7.50 6.68 6.279 O8Iaf(n)+O4/5 285 0
18 HD 168607 s*b 18 21 14.8856951904 -16 22 31.763755236 10.23 9.82 8.28 8.55   B9Iaep 183 1
19 HD 169454 s*b 18 25 15.1937863728 -13 58 42.309359544 7.39 7.61 6.71 5.82 5.13 B1Ia 327 1
20 HD 170740 SB* 18 31 25.6939245072 -10 47 45.008376432 5.51 5.96 5.72     B2V+ 185 1
21 HD 183143 s*b 19 27 26.5636061496 +18 17 45.193019136 8.25 8.08 6.86 5.74 4.79 B6Ia 429 0
22 HD 190603 s*b 20 04 36.1742825304 +32 13 06.953333016 5.73 6.19 5.65 5.13 4.71 B1.5Ia 336 0
23 Schulte 12 s*b 20 32 40.9572199728 +41 14 29.279036940 16.1 14.45 11.702     B3-4Ia+ 402 0
24 HD 204827 SB* 21 28 57.7592315784 +58 44 23.238427956 8.63 8.74 7.94 7.25 6.76 O9.5IV 333 0
25 * 13 Cep V* 21 54 53.1538880928 +56 36 40.415024952 6.50 6.52 5.80 5.12 4.52 B8Ib 183 0
26 BD+63 1964 * 23 17 21.5626507224 +64 07 16.165682868 8.79 9.05 8.5     B0 82 0

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2023.01.30-23:08:30

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