2019A&A...622A..31B

Query : 2019A&A...622A..31B

2019A&A...622A..31B - Astronomy and Astrophysics, volume 622A31-31 (2019/2-1)

The EDIBLES survey. IV. Cosmic ray ionization rates in diffuse clouds from near-ultraviolet observations of interstellar OH+.

BACALLA X.L., LINNARTZ H., COX N.L.J., CAMI J., ROUEFF E., SMOKER J.V., FARHANG A., BOUWMAN J. and ZHAO D.

Abstract (from CDS):

We report cosmic ray ionization rates toward ten reddened stars studied within the framework of the EDIBLES (ESO Diffuse Interstellar Bands Large Exploration Survey) program, using the VLT-UVES. For each sightline, between two and ten individual rotational lines of OH+ have been detected in its (0,0) and (1,0) A3Π - X3Σ– electronic band system. This allows constraining of OH+ column densities toward different objects. Results are also presented for 28 additional sightlines for which only one or rather weak signals are found. An analysis of these data makes it possible to derive the primary cosmic ray ionization rate ζp in the targeted diffuse interstellar clouds. For the ten selected targets, we obtain a range of values for ζp equal to (3.9-16.4)x10–16s–1. These values are higher than the numbers derived in previous detections of interstellar OH+ in the far-infrared/submillimeter-wave regions and in other near-ultraviolet studies. This difference is a result of using new OH+ oscillator strength values and a more complete picture of all relevant OH+ formation and destruction routes (including the effect of proton recombinations on PAHs), and the relatively high N(OH+) seen toward those ten targets.

Abstract Copyright: © ESO 2019

Journal keyword(s): ISM: abundances - cosmic rays - ISM: molecules - ultraviolet: ISM

Simbad objects: 58

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Number of rows : 58
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 * o Per * 03 42 22.6459308614 +33 57 54.093701142 4.13 4.912 4.972     B0.5V 315 0
2 * omi Per SB* 03 44 19.1337687984 +32 17 17.687367960 3.13 3.91 3.91 3.71 3.71 B1III 628 0
3 * zet Per s*b 03 54 07.9224751 +31 53 01.081262 2.19 2.97 2.85 2.71 2.62 B1Ib 881 0
4 * 62 Tau * 04 23 59.7627483096 +24 18 03.527065188 6.18 6.499 6.337     B3V 237 0
5 HD 37367 * 05 39 18.3135535104 +29 12 54.788852916 5.6 6.116 5.984     B2IV-V 141 0
6 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 555 0
7 HD 37903 Em* 05 41 38.3891026008 -02 15 32.479650720 7.32 7.94 7.83 7.64 7.52 B3IV 385 0
8 * chi02 Ori s*b 06 03 55.1843706432 +20 08 18.428141364 4.24 4.91 4.63 4.32 4.10 B2Ia 465 0
9 * 9 Gem s*b 06 16 58.7058631680 +23 44 27.284070336 6.31 6.70 6.25 5.78 5.38 B3Iab 253 0
10 CD-32 4348 s*b 07 44 26.4304420296 -33 13 18.599967768 10.11 10.05 9.19 9.30   B3Ia 46 0
11 HD 63804 s*b 07 49 19.5930767904 -33 19 47.291664468 9.16 8.819 7.782 8.09   B9.5Ia+(e) 63 0
12 HD 75309 V* 08 47 27.9647002224 -46 27 03.958625664 7.05 7.82 7.84 8.77   B2Ib/II 81 0
13 HD 75860 s*b 08 50 53.2419265893 -43 45 05.431137671 8.05 8.30 7.58 6.83 6.23 B1.5Iabp 96 0
14 NAME SDP 17b G 09 03 02.9 -01 41 27           ~ 18 0
15 HD 78344 * 09 05 51.3294079248 -47 46 06.834233424 10.10 10.12 9.00 8.55 8.16 O9.5/B0(Ib) 87 0
16 HD 79186 s*b 09 11 04.3980934536 -44 52 04.448548776 4.65 5.22 5.00 4.71 4.49 B5Ia 149 0
17 HD 80077 s*b 09 15 54.7869062472 -49 58 24.575734452 10.50 10.29 9.00 7.89   B2.5Ia+ 156 0
18 HD 80558 s*b 09 18 42.3559197816 -51 33 38.338564212 6.15 6.47 5.93 5.36 4.94 B6Ia 124 0
19 HD 303308 ** 10 45 05.9147911152 -59 40 05.925360036 7.45 8.30 8.17 7.92 7.75 O4.5V((fc)) 314 0
20 HD 110432 HXB 12 42 50.2663572384 -63 03 31.052981412 4.79 5.58 5.31     B0.5IVpe 334 0
21 V* BU Cru EB* 12 53 37.6193092848 -60 21 25.425832356 6.49 7.04 6.84 7.55   B2Ib 115 0
22 * tet Mus WR* 13 08 07.1531705448 -65 18 21.679426548 4.71 5.50 5.53 5.44 5.40 WC5+B0III 336 0
23 HD 114886 ** 13 14 44.38260 -63 34 51.8077 6.15 6.98 6.89 7.76   O9-B0V 114 0
24 HD 122879 V* 14 06 25.1578487688 -59 42 57.254187024 5.90 6.64 6.50 6.33 6.18 B0Ia 182 1
25 * nu. Sco ** 16 11 59.73568 -19 27 38.5361 3.42 4.05 4.00 3.90 3.87 B2V 404 0
26 HD 147888 ** 16 25 24.2915998776 -23 27 36.747568152 6.71 7.05 6.74     B3V 228 0
27 HD 147889 Or* 16 25 24.3163637976 -24 27 56.569805208 8.56 8.73 7.90     B2V 512 1
28 HD 148937 SB* 16 33 52.3869185520 -48 06 40.476418740 6.49 7.12 6.71 7.61   O6f?p 417 1
29 * mu. Nor s*b 16 34 05.0193637737 -44 02 43.120603946 4.05 4.99 4.94 6.36   O9.7Iab 286 0
30 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
31 * 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
32 HD 151804 s*b 16 51 33.7218052272 -41 13 49.919519496 4.45 5.29 5.22     O8Iaf 389 0
33 HD 152248 Y*O 16 54 10.0618206816 -41 49 30.139291596 5.56 6.15 6.088     O7Iabf+O7Ib(f) 270 0
34 HD 152408 WR* 16 54 58.5051071856 -41 09 03.093075612 5.17 5.92 5.77 7.00   O8Iape 388 0
35 HD 152424 s*b 16 55 03.3294878112 -42 05 26.990821824 6.11 6.69 6.27 7.49   OC9.2Ia 210 0
36 HD 154043 s*b 17 05 18.8805091944 -47 04 08.538750948 7.37 7.73 7.10 7.83   B2Iab 56 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 155806 Be* 17 15 19.2478670712 -33 32 54.299379012 4.61 5.52 5.53     O7.5V((f))z(e) 240 0
39 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2443 1
40 W 31c HII 18 10 29.1 -19 56 05           ~ 357 0
41 * mu. Sgr s*b 18 13 45.8088401 -21 03 31.794073 3.60 4.07 3.85 3.58 3.38 B8Iab(e) 354 0
42 * 15 Sgr s*b 18 15 12.9063291264 -20 43 41.767600368 4.64 5.42 5.37 5.27 5.19 O9.7Iab 268 0
43 HD 167838 V* 18 17 37.7108042088 -15 25 50.562693948 6.83 7.19 6.73 7.60   B3Ia/ab 104 0
44 BD-14 5037 s*b 18 25 06.1817902200 -14 38 57.717990780 9.87 9.72 8.41 7.03 5.92 B1.5Ia+ 114 0
45 HD 169454 s*b 18 25 15.1937863728 -13 58 42.309359544 7.39 7.61 6.71 5.82 5.13 B1Ia+ 359 1
46 HD 170740 SB* 18 31 25.6939245072 -10 47 45.008376432 5.51 5.96 5.72     B2V+ 210 1
47 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 724 1
48 HD 171957 * 18 38 04.4794634424 -14 00 17.218145016   6.68 6.47     B8II/III 45 0
49 HD 172694 Be* 18 42 16.5708437088 -15 51 20.829852396 7.61 8.32 8.12 9.04   B1:Vne 61 0
50 W 49n HII 19 10 13.2 +09 06 12           ~ 497 3
51 * 1 Vul SB* 19 16 13.0391965104 +21 23 25.544515308 4.18 4.72 4.77 4.76 4.83 B4IV 130 0
52 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
53 * kap Aql * 19 36 53.4488871022 -07 01 38.924816492 4.050 4.930 4.960 4.90 4.94 B0.5IIIn 354 0
54 HD 185418 * 19 38 27.4809937872 +17 15 26.048161044 7 7.639 7.485     B0.5V 144 0
55 HD 185859 Em* 19 40 28.3246282752 +20 28 37.474738716 6.290 6.890 6.520 6.18 5.92 B3I+ 145 0
56 HD 186745 sg* 19 45 24.3491996232 +23 56 34.374919992 8.00 7.96 7.03     B8Ia 108 0
57 HD 186841 s*b 19 45 54.1345095864 +24 05 47.000103576 8.55 8.86 8.01 7.23 6.71 B1Ia 71 0
58 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 245 0

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