2020MNRAS.497.3180A

Query : 2020MNRAS.497.3180A

2020MNRAS.497.3180A - Mon. Not. R. Astron. Soc., 497, 3180-3190 (2020/September-3)

The effect of the slit configuration on the H2 1-0 s(1) to Br γ line ratio of spatially resolved planetary nebulae.

ALEMAN I.

Abstract (from CDS):

The H2 1-0 S(1)/Br γ ratio (R(Br γ)) is used in many studies of the molecular content in planetary nebulae (PNe). As these lines are produced in different regions, the slit configuration used in spectroscopic observations may have an important effect on their ratio. In this work, observations and numerical simulations are used to demonstrate and quantify such effect in PNe. The study aims to assist the interpretation of observations and their comparison to models. The analysis shows that observed R(Br γ) ratios reach only values up to 0.3 when the slit encompasses the entire nebula. Values higher than that are only obtained when the slit covers a limited region around the H2 peak emission and the Br γ emission is then minimized. The numerical simulations presented show that, when the effect of the slit configuration is taken into account, photoionization models can reproduce the whole range of observed R(Br γ) in PNe, as well as the behaviour described above. The argument that shocks are needed to explain the higher values of R(Br γ) is thus not valid. Therefore, this ratio is not a good indicator of the H2 excitation mechanism as suggested in the literature.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): astrochemistry - circumstellar matter - ISM: molecules - photodissociation region - planetary nebulae: general

Simbad objects: 69

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Number of rows : 69
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 NGC 40 PN 00 13 01.0170097248 +72 31 19.033338720   11.63 11.46     [WC8] 632 2
2 PN M 1-4 PN 03 41 43.4191369752 +52 17 00.267451836   15.86 14.27 15.26   ~ 126 1
3 IC 2003 PN 03 56 21.9884187048 +33 52 30.759977028   13.11 11.87 13.44   [WC3?] 261 0
4 NGC 1535 PN 04 14 15.7689913368 -12 44 21.932484324   12.01 12.82     sdO3: 518 1
5 PN K 3-67 PN 04 39 47.92824 +36 45 42.6276   15.085 13.680 14.965   ~ 78 0
6 SMP LMC 6 PN 04 47 38.9887465320 -72 28 20.573471100   27.05       ~ 39 0
7 LHA 120-N 122 PN 05 19 54.6343865856 -69 31 04.997987184 15.479 15.916 15.080 14.84 16.317 ~ 56 0
8 LHA 120-N 201 PN 05 24 55.1017509912 -71 32 56.326765848 14.822 15.319 14.240 14.440 15.698 ~ 66 0
9 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1059 2
10 IRAS 05319-7042S pA? 05 31 21.892 -70 40 45.47 15.439 15.842 14.676 14.950 16.530 ~ 47 0
11 LHA 120-N 69 PN 05 40 30.8107868952 -66 17 37.261370940 15.834 16.533 15.711   16.382 [WC8] 55 0
12 LHA 120-N 221 PN 06 18 58.024 -71 35 50.52   16.05       ~ 47 0
13 IC 2165 PN 06 21 42.7847803566 -12 59 14.040997076   12.146 10.782 12.305   ~ 385 0
14 PN VV 28 PN 06 25 57.2710426104 +17 47 27.136548168     12.5     [WC] 298 0
15 PN M 1-6 PN 06 35 45.1241072736 -00 05 37.396958568     15.84     O6-9I 121 1
16 PN K 4-48 PN 06 39 55.842 +11 06 30.34     13.2     ~ 44 0
17 NGC 2346 PN 07 09 22.5215800440 -00 48 23.610997332   11.76 11.58     A5V 592 0
18 PN M 1-11 PN 07 11 16.6948815960 -19 51 02.898476424     13.5     WC10-11 153 0
19 PN M 1-13 PN 07 21 15.037 -18 08 34.65   11.0       ~ 100 0
20 NGC 2440 PN 07 41 55.34603 -18 12 30.4117   11.469 10.104     ~ 665 2
21 NGC 2792 PN 09 12 26.561 -42 25 38.92     11.8     ~ 181 0
22 NGC 2818A PN 09 16 01.4901525600 -36 37 37.516376856           ~ 239 1
23 NGC 2899 PN 09 27 03.02 -56 06 21.1     12.40     G0 158 0
24 NGC 3132 PN 10 07 01.7656422504 -40 26 11.130553032   10.14 10.01     A2V 423 1
25 NGC 3242 PN 10 24 46.1335521792 -18 38 32.296857792   11.83 12.15     ~ 838 1
26 PN Hf 48 PN 11 03 55.98 -60 36 04.6     15.00     ~ 42 0
27 NGC 4071 PN 12 04 14.7015321744 -67 18 36.458254800     14.00     ~ 95 0
28 NGC 5189 PN 13 33 32.8780414224 -65 58 27.041428272   14.1 14.5   14.35 [WO1] 331 1
29 PN MyCn 18 PN 13 39 35.0596178496 -67 22 51.750497136   13.30 12.54 13.19 12.61 ~ 293 1
30 IC 4406 PN 14 22 26.1440976888 -44 09 02.185112988   11.5 10.90     ~ 294 1
31 WRAY 16-156 PN 14 33 17.97 -60 49 36.3   16.3 16.7   15.38 ~ 168 0
32 WRAY 16-159 PN 15 04 08.6255732424 -60 53 20.140992096     14.00     ~ 76 0
33 PN Me 2-1 PN 15 22 19.2811793544 -23 37 31.412401104   12.2 12.20     ~ 224 0
34 PN Mz 1 PN 15 34 16.6410983544 -59 09 08.105422716   12.8 13.10     ~ 124 0
35 NGC 6072 PN 16 12 58.3635385680 -36 13 47.395106184     12.10     ~ 182 1
36 NGC 6153 PN 16 31 30.5708444544 -40 15 12.646208700   10.7 15.55     ~ 320 0
37 NGC 6210 PN 16 44 29.5191019368 +23 47 59.421958296   12.3 11.7     Of/[WR] 597 0
38 PN M 2-9 PN 17 05 37.96152 -10 08 32.5068           ~ 532 0
39 NGC 6302 PN 17 13 44.5 -37 06 11           O-rich 821 2
40 CD-59 6479 PN 17 16 21.0591001224 -59 29 23.383608324 10.03   12.279 12.704   B3e 144 0
41 PN Hb 5 PN 17 47 56.20 -29 59 39.6   10.50 10.78     ~ 274 0
42 NGC 6445 PN 17 49 15.0282384611 -20 00 34.159640072   18.9       ~ 302 0
43 PN Vy 1-2 PN 17 54 22.98 +27 59 58.1           ~ 118 0
44 NGC 6537 PN 18 05 13.104 -19 50 34.88     13.58     ~ 438 1
45 NGC 6572 PN 18 12 06.3181909152 +06 51 13.027935240   9.3 10.8     [WC] 761 0
46 PN SwSt 1 PN 18 16 12.2834104368 -30 52 07.906578996   12.1 11.10     [WC9/10] 301 0
47 PN Cn 3-1 PN 18 17 34.1015035728 +10 09 03.304908396   12.93 12.49 12.35   07Ib(f) 224 0
48 M 57 PN 18 53 35.0967659112 +33 01 44.883287544   15.405 15.769 15.901 16.062 DA(O?) 868 2
49 NGC 6772 PN 19 14 36.373 -02 42 25.04   17.01       ~ 154 0
50 NGC 6778 PN 19 18 24.9542333399 -01 35 47.155403881   13.747 12.721     ~ 272 0
51 NGC 6790 PN 19 22 56.972976 +01 30 46.40112   12.247 10.504 12.684   wels 329 0
52 PN Vy 2-2 PN 19 24 22.2390166933 +09 53 56.259102426   14.02 12.65 13.38   O-rich 274 0
53 HD 184738 PN 19 34 45.2337620448 +30 30 58.950651240   10.41 10.44     [WC9] 976 0
54 PN M 1-74 PN 19 42 18.78 +15 09 08.3   12.8       ~ 127 0
55 PN M 1-75 PN 20 04 44.21070 +31 27 26.6673           ~ 102 2
56 PN M 4-17 PN 20 09 01.927 +43 43 43.54           ~ 39 0
57 NGC 6881 PN 20 10 52.45 +37 24 42.4           ~ 213 0
58 NGC 6886 PN 20 12 42.83016 +19 59 22.6320   13.053 11.719     ~ 325 1
59 IC 4997 PN 20 20 08.7557973960 +16 43 53.698933380   11.94 11.15     [WC7/8] 555 0
60 NGC 7009 PN 21 04 10.8155187648 -11 21 48.580157556   12.48 12.07     ~ 1020 1
61 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
62 NGC 7048 PN 21 14 15.1876901775 +46 17 17.103824106           ~ 137 1
63 PN K 3-60 PN 21 27 26.47944 +57 39 06.1704           ~ 54 0
64 IC 5117 PN 21 32 30.96912 +44 35 47.5404           ~ 310 1
65 PN Hu 1-2 PN 21 33 08.3106242400 +39 38 09.554428752     12.0     ~ 295 1
66 IC 5217 PN 22 23 55.7180137224 +50 58 00.464340252     15.5     [WC7] 314 0
67 NGC 7293 PN 22 29 38.5454047152 -20 50 13.747242408 11.894 13.158 13.524 13.689 13.898 DAO.5 983 1
68 NGC 7662 PN 23 25 53.8318792825 +42 32 05.835828380       11.427   ~ 940 1
69 PN Hb 12 PN 23 26 14.8236376464 +58 10 54.543292356   13.51 11.49 12.44   Oe 338 0

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