2024A&A...689A..14A

Query : 2024A&A...689A..14A

2024A&A...689A..14A - Astronomy and Astrophysics, volume 689A14 (2024/9-1)

Detection of the [C I] λ8727 emission line Low-ionization structures in NGC 7009.

AKRAS S., MONTEIRO H., WALSH J.R., KONSTANTINOU L., GONCALVES D.R., GARCIA-ROJAS J., BOUMIS P. and ALEMAN I.

Abstract (from CDS):

We report the first spatially resolved detection of the near-infrared [C I] λ8727 emission from the outer pair of low-ionization structures in the planetary nebula NGC 7009 from data obtained by the Multi Unit Spectroscopic Explorer integral field unit. This atomic carbon emission marks the transition zone between ionized and neutral gas and for the first time offers direct evidence that LISs are photodominated regions. The outer LIS pair exhibits intense [C I] λ8727 emission, but He I λ8733 is absent. Conversely, the inner pair of knots shows both lines, likely due to the host nebula emission. Furthermore, the [C I] λ8727 line is absent in the host nebula emission, but He I λ8733 is present. Although the origin of the [C I] λ8727 line is still debated, its detection supports the scenario of photoevaporated dense molecular clumps.

Abstract Copyright: © The Authors 2024

Journal keyword(s): shock waves - ISM: atoms - photon-dominated region (PDR) - planetary nebulae: individual: NGC 7009

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 PN BoBn 1 PN 00 37 16.03 -13 42 58.6   16       ~ 135 1
2 LIN 49 PN 00 43 53.887 -72 55 14.79   16.3 17.1 16.7 16.91 ~ 21 0
3 NGC 346 Cl* 00 59 04.4000 -72 10 39.000           ~ 547 0
4 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1059 2
5 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
6 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
7 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 657 1
8 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
9 PN VV 28 PN 06 25 57.2710426104 +17 47 27.136548168     12.5     [WC] 298 0
10 NGC 2346 PN 07 09 22.5215800440 -00 48 23.610997332   11.76 11.58     A5V 592 0
11 NGC 2440 PN 07 41 55.34603 -18 12 30.4117   11.469 10.104     ~ 665 2
12 NGC 3132 PN 10 07 01.7656422504 -40 26 11.130553032   10.14 10.01     A2V 423 1
13 NGC 3199 HII 10 16 32.8 -57 56 02           ~ 70 1
14 HD 89358 WR* 10 17 02.2743231360 -57 54 46.875258324 11.1 11.19 10.83 10.59   WN4-s 181 1
15 NGC 3242 PN 10 24 46.1335521792 -18 38 32.296857792   11.83 12.15     ~ 838 1
16 PN Pe 1-1 PN 10 38 27.5856481368 -56 47 07.226821644   15.855 14.178 15.394   [WC4/5] 108 1
17 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
18 HD 101584 pA* 11 40 58.8051522552 -55 34 25.814696232 7.80 7.40 7.01     B8/9I/IIe 156 0
19 WRAY 16-100 PN 11 48 38.0955840000 -65 08 36.445176132   14.595 13.036 14.833   ~ 93 1
20 NGC 3918 PN 11 50 17.7709504944 -57 10 57.017302428   10.0 8.5     ~ 390 1
21 WRAY 16-117 PN 12 30 30.4344727152 -64 52 05.689186752   14.55 15.00     [WC4] 130 0
22 PN H 4-1 PN 12 59 27.78107 +27 38 10.6612           OB 167 0
23 WRAY 16-133 PN 13 42 36.1638733080 -61 22 28.912461456     15.86     ~ 61 0
24 NGC 5315 PN 13 53 56.9726795664 -66 30 50.859483264   14.58 14.40     [WO4] 323 1
25 IC 4406 PN 14 22 26.1440976888 -44 09 02.185112988   11.5 10.90     ~ 294 1
26 HD 141969 PN 15 56 01.6950076104 -66 09 09.231820920 12.37 10.75 10.95 10.88   BC0Ibe 228 0
27 NGC 6210 PN 16 44 29.5191019368 +23 47 59.421958296   12.3 11.7     Of/[WR] 597 0
28 PN PC 14 PN 17 06 14.75 -52 30 00.5   17.2 16.5     [WC4/6] 119 0
29 NGC 6302 PN 17 13 44.5 -37 06 11           O-rich 821 2
30 CD-59 6479 PN 17 16 21.0591001224 -59 29 23.383608324 10.03   12.279 12.704   B3e 144 0
31 NGC 6369 PN 17 29 20.4566510904 -23 45 34.771819248   16.6 12.00     [WC4] 335 0
32 PN M 1-25 PN 17 38 30.3160501176 -22 08 38.934269052   17.9       [WC6] 156 0
33 PN Hb 4 PN 17 41 52.8002065320 -24 42 08.330663196   18.4 17     [WC4] 232 1
34 PN M 1-31 PN 17 52 41.4448424016 -22 21 57.159303984           [WC] 116 0
35 PN M 1-30 PN 17 52 58.95 -34 38 22.6   16.6 16.4     ~ 117 0
36 PN H 1-40 PN 17 55 36.0545698680 -30 33 32.359297176     15.50     ~ 107 0
37 NGC 6543 PN 17 58 33.4039587288 +66 37 58.750734000   11.09 11.28     [WC] 1197 2
38 PN M 1-33 PN 17 58 58.813200 -15 32 14.79408       14.566   ~ 71 1
39 PN H 1-50 PN 18 03 53.5082954976 -32 41 42.015068628   10 12.80     ~ 87 0
40 PN M 1-42 PN 18 11 04.99 -28 58 59.1   13.1 14.00     ~ 221 0
41 PN M 2-31 PN 18 13 16.0521431976 -25 30 05.320920636   13.3 13.60     [WC4/6] 110 0
42 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
43 PN Cn 1-5 PN 18 29 11.6500996872 -31 29 59.135208396   15.5 15.2 13.34   [WC5/6] 163 0
44 PN M 1-60 PN 18 43 38.0929948608 -13 44 49.280634744           [WC4] 95 0
45 PN M 1-61 PN 18 45 55.12 -14 27 37.9           ~ 116 0
46 M 57 PN 18 53 35.0967659112 +33 01 44.883287544   15.405 15.769 15.901 16.062 DA(O?) 868 2
47 HH 99 HH 19 02 05.407 -36 54 39.85           ~ 29 0
48 NGC 6741 PN 19 02 37.10 -00 26 56.7     9.6     ~ 353 0
49 NGC 6778 PN 19 18 24.9542333399 -01 35 47.155403881   13.747 12.721     ~ 272 0
50 NGC 6781 PN 19 18 28.085 +06 32 19.29           ~ 271 1
51 M 27 PN 19 59 36.3631850088 +22 43 16.312059552   13.749 14.089 14.247 14.405 DAO.6 605 0
52 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
53 NGC 7009 PN 21 04 10.8155187648 -11 21 48.580157556   12.48 12.07     ~ 1020 1
54 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
55 IC 5117 PN 21 32 30.96912 +44 35 47.5404           ~ 310 1
56 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1
57 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
58 NGC 7662 PN 23 25 53.8318792825 +42 32 05.835828380       11.427   ~ 940 1

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