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

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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 - 2026 		#notes
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
2 V* AE Aur Or* 05 16 18.1493304816 +34 18 44.344404000 5.48 6.18 5.96     O9.5V 597 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 413 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)) 406 0
5 HD 46573 SB* 06 34 23.5692982800 +02 32 02.944339980 7.61 8.27 7.93     O7V((f))z 143 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 71 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 194 1
8 HD 68450 * 08 11 01.6832319648 -37 17 32.549289720 5.58 6.42 6.44 7.43   O9.7II 142 0
9 HD 76341 Em* 08 54 00.6139723224 -42 29 08.763425340 6.88 7.392 7.163 8.08   O9.2IV 118 1
10 V* V661 Car SB* 10 44 00.3711575208 -59 52 27.521778900 7.60 8.31 8.04 8.75   O6.5III(f) 148 0
11 HD 93161 ** 10 44 08.97168 -59 34 34.8780 7.39 7.96 7.87     O8V+O9V+O6.5(f) 97 0
12 HD 100444 s*b 11 32 53.3361313464 -63 38 48.446935656 7.88 8.63 8.42 9.22   O9II 60 0
13 HD 101191 SB* 11 38 12.1672877688 -63 23 26.799724320 7.69 9.32 9.36 9.29   O8V 86 0
14 HD 101205 ** 11 38 20.36114 -63 22 21.8889 5.64 6.53 6.54 7.41   O6V 164 0
15 HD 101223 * 11 38 22.7710327032 -63 12 02.800069956 8.12 9.55 9.51 9.41   O8V 84 0
16 HD 101545 ** 11 40 37.00313 -62 34 05.1669 5.54 6.40 6.38 7.57   O9.5Ib+B0.5Iab 80 0
17 HD 106343 s*b 12 14 16.9257756576 -64 24 30.669334128 5.58 6.292 6.235     B1.5Ia 93 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 217 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 162 0
20 HD 136239 s*b 15 22 20.0795078784 -59 08 49.938478008 8.57 8.86 7.95 8.42   B2Iae 75 0
21 HD 147889 Or* 16 25 24.3163637976 -24 27 56.569805208 8.56 8.73 7.90     B2V 512 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 191 0
23 HD 148546 Pu* 16 30 23.3122183296 -37 58 21.169697268 7.28 7.99 7.71 8.58   O9Iab 91 0
24 HD 148937 SB* 16 33 52.3869185520 -48 06 40.476418740 6.49 7.12 6.71 7.61   O6f?p 417 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 265 0
26 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1908 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 201 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) 73 0
29 HD 152219 SB* 16 53 55.6078109256 -41 52 51.496403268 6.950 7.705 7.569   7.267 O9.5III(n) 114 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 205 0
31 HD 152234 s*b 16 54 01.8373785611 -41 48 22.987399147 4.92 5.64 5.45     B0.5Ia 201 0
32 HD 152233 SB* 16 54 03.5909222280 -41 47 29.841281484 5.93 6.72 6.59     O6II(f) 202 0
33 HD 152246 SB* 16 54 05.2976157264 -41 04 46.117795944 6.69 7.45 7.29 8.19   O9IV 132 1
34 HD 152249 s*b 16 54 11.6395658856 -41 50 57.295111524 5.91 6.65 6.45     OC9Iab 254 0
35 CD-41 11037 SB* 16 54 13.2253067352 -41 50 32.518100184 7.21 8.08 7.90     O9IV 78 0
36 HD 152314 ** 16 54 32.0048577720 -41 48 18.848961036 7.256 7.974 7.749 9.01 7.446 O9IV 113 0
37 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 316 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)) 161 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 282 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 193 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 149 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) 82 0
43 HD 168137 Y*O 18 18 56.1894798360 -13 48 31.092549588 8.72 9.36 8.94 9.55   O8Vz 131 0
44 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B8Ia+ 293 2
45 W 49 SFR 19 10 20 +09 07.7           ~ 601 1
46 * 20 Aql V* 19 12 40.7117853648 -07 56 22.263784872 5.03 5.47 5.34     B2/3II 240 0
47 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
48 HD 183143 s*b 19 27 26.5636061496 +18 17 45.193019136 8.25 8.08 6.86 5.74 4.79 B7Ia+ 464 0
49 HD 186745 sg* 19 45 24.3491996232 +23 56 34.374919992 8.00 7.96 7.03     B8Ia 108 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+ 357 0
51 HD 228779 s*b 20 17 54.1881945216 +34 49 02.035707276 10.45 10.23 8.92     O9Iab 58 0
52 Schulte 7 * 20 33 14.1095938872 +41 20 21.904113804 12.24 12.00 10.55     O3If* 153 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) 253 0
54 BD+41 3807 SB* 20 34 08.5147948176 +41 36 59.408503092 11.74 11.52 10.03     O5.5Ifc 137 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 372 0
56 HD 206267 Y*O 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 520 0

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