2021A&A...656A.100R


Query : 2021A&A...656A.100R

2021A&A...656A.100R - Astronomy and Astrophysics, volume 656A, 100-100 (2021/12-1)

The C60:C60+ ratio in diffuse and translucent interstellar clouds.

ROUILLE G., KRASNOKUTSKI S.A. and CARPENTIER Y.

Abstract (from CDS):


Context. Insight into the conditions that drive the physics and chemistry in interstellar clouds is gained from determining the abundance and charge state of their components.
Aims. We propose an evaluation of the C60:C60+_ ratio in diffuse and translucent interstellar clouds that exploits electronic absorption bands so as not to rely on ambiguous IR emission measurements.
Methods. The ratio is determined by analyzing archival spectra and literature data. Information on the cation population is obtained from published characteristics of the main diffuse interstellar bands attributed to C60+_ and absorption cross sections already reported for the vibronic bands of the cation. The population of neutral molecules is described in terms of upper limits because the relevant vibronic bands of C60 are not brought out by observations. We revise the oscillator strengths reported for C60 and measure the spectrum of the molecule isolated in Ne ice to complete them.
Results. We scale down the oscillator strengths for absorption bands of C60 and find an upper limit of approximately 1.3 for the C60:C60+_ ratio.
Conclusions. We conclude that the fraction of neutral molecules in the buckminsterfullerene population of diffuse and translucent interstellar clouds may be notable despite the non-detection of the expected vibronic bands. More certainty will require improved laboratory data and observations.

Abstract Copyright: © G. Rouillé et al. 2021

Journal keyword(s): astrochemistry - ISM: abundances - ISM: lines and bands - ISM: molecules

Simbad objects: 14

goto Full paper

goto View the references in ADS

Number of rows : 14
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 IC 348 OpC 03 44 32 +32 09.5           ~ 1334 1
2 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1021 2
3 HD 76341 Em* 08 54 00.6139723224 -42 29 08.763425340 6.88 7.392 7.163 8.08   O9.2IV 101 1
4 V* DY Cen RC* 13 25 34.0847063328 -54 14 43.129581792     12.00     C-Hd/B5-6Ie 92 0
5 HD 136239 s*b 15 22 20.0795078784 -59 08 49.938478008 8.57 8.86 7.95 8.42   B2Iae 65 0
6 HD 148379 Be* 16 29 42.3277745448 -46 14 35.630932596 5.51 5.95 5.37 4.85 4.39 B2Iab 175 0
7 PN Tc 1 PN 17 45 35.2879212240 -46 05 23.717122728   11.30 11.49     PCyg 251 0
8 * 15 Sgr s*b 18 15 12.9063291264 -20 43 41.767600368 4.64 5.42 5.37 5.27 5.19 O9.7Iab 247 0
9 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B6Iap 270 2
10 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
11 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
12 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 890 0
13 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) 238 0
14 BD+63 1964 * 23 17 21.5626507224 +64 07 16.165682868 8.79 9.05 8.5     B0 82 0

To bookmark this query, right click on this link: simbad:objects in 2021A&A...656A.100R and select 'bookmark this link' or equivalent in the popup menu


2023.01.31-01:51:39

© Université de Strasbourg/CNRS

    • Contact