2011ApJ...735..124K

Query : 2011ApJ...735..124K

2011ApJ...735..124K - Astrophys. J., 735, 124 (2011/July-2)

Can H2 CCC Be the carrier of broad diffuse bands?

KRELOWSKI J., GALAZUTDINOV G. and KOLOS R.

Abstract (from CDS):

The recent assignment of two broad diffuse interstellar bands (DIBs) near 4882 and 5450 Å to the propadienylidene (l-C3H2) molecule is examined using a statistically meaningful sample of targets. Our spectra clearly show that the strength ratio of two broad DIBs is strongly variable, contrary to what should be observed if both features are due to l-C3H2, since the proposed transitions are lifetime broadened and start from the same level. Moreover, even in directions where the 4882 DIB and 5450 DIB are strong, the third expected l-C3H2band, in the 5165-5185 Å region, is absent. Another puzzling characteristic of l-C3H2 as the proposed carrier of both broad diffuse bands is its column density of several 1014/cm2, inferred from the equivalent width of the 5450 DIB. This value is one order of magnitude higher than N(CH) toward the same objects and two to three orders of magnitude higher than N(H2CCC), measured at radio frequencies in absorption, for comparable samples of the diffuse medium. We conclude that the proposed identification of broad DIBs is unjustified.

Abstract Copyright: ∼

Journal keyword(s): ISM: molecules

Simbad objects: 56

goto Full paper

goto View the references in ADS

Number of rows : 56
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 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1676 0
2 V* AE Aur Or* 05 16 18.1493304816 +34 18 44.344404000 5.48 6.18 5.96     O9.5V 564 1
3 HD 46150 Y*O 06 31 55.5205071744 +04 56 34.296516096 6.03 6.86 6.73 6.50 6.41 O5V((f))z 396 0
4 HD 46223 Y*O 06 32 09.3068103600 +04 49 24.705695568 6.73 7.50 7.28 6.95 6.79 O4V((f)) 381 0
5 HD 46573 SB* 06 34 23.5692982800 +02 32 02.944339980 7.61 8.27 7.93     O7V((f))z 129 0
6 HD 46711 s*b 06 34 57.0491751096 +02 45 43.213164192 10.09 10.09 9.25 8.45 7.77 B8Ia/ab 66 0
7 HD 47432 Pu* 06 38 38.1872868432 +01 36 48.675208608 5.67 6.44 6.31 6.11 6.04 O9.7Ib 182 1
8 HD 68450 * 08 11 01.6832319648 -37 17 32.549289720 5.58 6.42 6.44 7.43   O9.7II 135 0
9 HD 76341 Em* 08 54 00.6139723224 -42 29 08.763425340 6.88 7.392 7.163 8.08   O9.2IV 107 1
10 V* V661 Car EB* 10 44 00.3711575208 -59 52 27.521778900 7.60 8.31 8.04 8.75   O6.5III(f) 143 0
11 HD 93161 SB* 10 44 08.972 -59 34 34.88 7.39 7.96 7.87     O8V+O9V+O6.5(f) 94 0
12 HD 100444 s*b 11 32 53.3361313464 -63 38 48.446935656 7.88 8.63 8.42 9.22   O9II 57 0
13 HD 101191 SB* 11 38 12.1672877688 -63 23 26.799724320 7.69 9.32 9.36 9.29   O8V 83 0
14 HD 101205 EB* 11 38 20.36114 -63 22 21.8889 5.64 6.53 6.54 7.41   O6V 160 0
15 HD 101223 * 11 38 22.7710327032 -63 12 02.800069956 8.12 9.55 9.51 9.41   O8V 80 0
16 HD 101545 ** 11 40 37.00313 -62 34 05.1669 5.54 6.40 6.38 7.57   O9.5Ib+B0.5Iab 76 0
17 HD 106343 s*b 12 14 16.9257756576 -64 24 30.669334128 5.58 6.292 6.235     B1.5Ia 88 0
18 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
19 HD 115842 s*b 13 20 48.3393402216 -55 48 02.482824528 5.70 6.39 6.09 5.77 5.52 B0.5Ia 154 0
20 HD 136239 s*b 15 22 20.0795078784 -59 08 49.938478008 8.57 8.86 7.95 8.42   B2Iae 68 0
21 HD 147889 Y*O 16 25 24.3163637976 -24 27 56.569805208 8.56 8.73 7.90     B2V 476 1
22 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
23 HD 148546 Pu* 16 30 23.3122183296 -37 58 21.169697268 7.28 7.99 7.71 8.58   O9Iab 83 0
24 HD 148937 SB* 16 33 52.3869185520 -48 06 40.476418740 6.49 7.12 6.71 7.61   O6f?p 391 1
25 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
26 * 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
27 HD 150136 SB* 16 41 20.4155898816 -48 45 46.730465028 4.98 5.78 5.65 6.93   O3.5-4III(f*)+O6IV 190 0
28 HD 152200 SB* 16 53 51.6564464880 -41 50 32.716447224 7.744 8.488 8.391 9.31 8.152 O9.7IV(n) 68 0
29 HD 152219 EB* 16 53 55.6078109256 -41 52 51.496403268 6.950 7.705 7.569   7.267 O9.5III(n) 108 0
30 HD 152235 s*b 16 53 58.8528412848 -41 59 39.577848180 6.47 6.92 6.38 5.84 5.42 B0.5Ia 192 0
31 HD 152234 s*b 16 54 01.8373779952 -41 48 22.987396952 4.92 5.64 5.45     B0.5Ia 194 0
32 HD 152233 SB* 16 54 03.5909222280 -41 47 29.841281484 5.93 6.72 6.59     O6II(f) 194 0
33 HD 152246 SB* 16 54 05.2976157264 -41 04 46.117795944 6.69 7.45 7.29 8.19   O9IV 123 1
34 HD 152249 s*b 16 54 11.6395658856 -41 50 57.295111524 5.91 6.65 6.45     OC9Iab 239 0
35 CD-41 11037 SB* 16 54 13.2253067352 -41 50 32.518100184 7.21 8.08 7.90     O9IV 75 0
36 HD 152314 Y*? 16 54 32.0048577720 -41 48 18.848961036 7.256 7.974 7.749 9.01 7.446 O9IV 108 0
37 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 294 0
38 HD 163800 * 17 58 57.2584170624 -22 31 03.165347496 6.61 7.27 7.00 6.68 6.49 O7.5III((f)) 149 0
39 HD 165052 SB* 18 05 10.5506592816 -24 23 54.847798080 6.16 6.98 6.87 7.77   O6.5V((f))z 267 1
40 HD 166734 s*b 18 12 24.6551425392 -10 43 53.060750040 9.36 9.49 8.42 7.33 6.47 O7.5Iabf 180 0
41 HD 168075 Y*O 18 18 36.0418343184 -13 47 36.449731536 8.62 9.22 8.77 9.45   O7V(n)((f))z 142 0
42 BD-13 4927 Y*O 18 18 40.0938541704 -13 45 18.603231696 10.12 10.14 9.48 9.71   O7II(f) 76 0
43 HD 168137 Y*O 18 18 56.1894798360 -13 48 31.092549588 8.72 9.36 8.94 9.55   O8Vz 122 0
44 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B8Ia+ 278 2
45 W 49 SFR 19 10 20 +09 07.7           ~ 575 1
46 * 20 Aql V* 19 12 40.7117853648 -07 56 22.263784872 5.03 5.47 5.34     B2/3II 231 0
47 W 51 SNR 19 23 50 +14 06.0           ~ 1278 1
48 HD 183143 s*b 19 27 26.5636061496 +18 17 45.193019136 8.25 8.08 6.86 5.74 4.79 B7Iae 444 0
49 HD 186745 sg* 19 45 24.3491996232 +23 56 34.374919992 8.00 7.96 7.03     B8Ia 102 0
50 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
51 HD 228779 s*b 20 17 54.1881945216 +34 49 02.035707276 10.45 10.23 8.92     O9Iab 54 0
52 Schulte 7 * 20 33 14.1095938872 +41 20 21.904113804 12.24 12.00 10.55     O3If* 145 0
53 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) 246 0
54 BD+41 3807 SB* 20 34 08.5147948176 +41 36 59.408503092 11.74 11.52 10.03     O5.5Ifc 128 0
55 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
56 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

To bookmark this query, right click on this link: simbad:objects in 2011ApJ...735..124K and select 'bookmark this link' or equivalent in the popup menu