2002A&A...390..533H


Query : 2002A&A...390..533H

2002A&A...390..533H - Astronomy and Astrophysics, volume 390, 533-553 (2002/8-1)

The carrier of the ``30'' µm emission feature in evolved stars. A simple model using magnesium sulfide.

HONY S., WATERS L.B.F.M. and TIELENS A.G.G.M.

Abstract (from CDS):

We present 2-45 µm spectra of a large sample of carbon-rich evolved stars in order to study the ``30''µm feature. We find the ``30''µm feature in a wide range of sources: low mass loss carbon stars, extreme carbon-stars, post-AGB objects and planetary nebulae. We extract the profiles from the sources by using a simple systematic approach to model the continuum. We find large variations in the wavelength and width of the extracted profiles of the ``30''µm feature. We modelled the whole range of profiles in a simple way by using magnesium sulfide (MgS) dust grains with a MgS grain temperature different from the continuum temperature. The systematic change in peak positions can be explained by cooling of MgS grains as the star evolves off the AGB. In several sources we find that a residual emission excess at ∼26µm can also be fitted using MgS grains but with a different grains shape distribution. The profiles of the ``30''µm feature in planetary nebulae are narrower than our simple MgS model predicts. We discuss the possible reasons for this difference. We find a sample of warm carbon-stars with very cold MgS grains. We discuss possible causes for this phenomenon. We find no evidence for rapid destruction of MgS during the planetary nebula phase and conclude that the MgS may survive to be incorporated in the ISM.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: carbon - circumstellar matter - stars: mass-loss - planetary nebulae: general - infrared: stars

Simbad objects: 77

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Number of rows : 77
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 40 PN 00 13 01.0170097248 +72 31 19.033338720   11.63 11.46     [WC8] 603 2
2 IRAS 00210+6221 C*? 00 23 50.861 +62 38 10.85           ~ 39 1
3 GSC 04501-00166 pA* 01 04 45.5109702912 +79 26 46.357116648   11.04 10.87 10.85   B1.7Ibeq 70 0
4 V* HV Cas C* 01 11 03.4682297496 +53 43 40.246817376     12.90     C4,3e 79 0
5 RAFGL 190 C* 01 17 51.378 +67 13 53.34           C-rich 68 0
6 V* R Scl C* 01 26 58.0939182720 -32 32 35.439234828 17.26 9.59 5.72 3.69 2.30 C-N5+ 316 0
7 IRAS Z02229+6208 pA* 02 26 41.7882689568 +62 21 21.981286008   14.69 12.00 11.16 8.92 G8-K0_0-Ia: 53 0
8 V* R For C* 02 29 15.3077617632 -26 05 55.646585700   12.94 7.50     C4,3e 188 0
9 RAFGL 341 C* 02 33 00.34296 +58 02 06.2340           C-rich 51 0
10 LEE 259 C* 03 26 29.5037418864 +47 31 48.551540844           N 170 0
11 RAFGL 5098 C* 03 35 31.458 +61 08 50.05           C-rich 27 0
12 V* U Cam C* 03 41 48.1758504744 +62 38 54.395692404   11.5 11.00     C-N5 239 0
13 IRAS 04296+3429 pA* 04 32 56.9743899192 +34 36 12.459816288   16.13 14.09 13.64 11.64 G0Ia 139 0
14 RAFGL 618 pA* 04 42 53.6242032600 +36 06 53.400902220   16.32   12.59   C-rich 985 0
15 V* W Ori C* 05 05 23.7190712856 +01 10 39.454639032 16.36 9.52 6.10 3.83 2.35 C-N5 281 0
16 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1019 2
17 V* V636 Mon C* 06 25 01.4305200360 -09 07 15.963301164       11.78 8.83 C-N5 51 0
18 RAFGL 940 C* 06 26 37.2725351496 +09 02 15.215521632           C 28 0
19 IRAS 06582+1507 C*? 07 01 08.634 +15 03 40.81           ~ 36 0
20 HD 56126 pA* 07 16 10.2590823192 +09 59 47.954735376   9.20 8.32     F0/5Ia 310 0
21 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2254 0
22 NGC 3918 PN 11 50 17.7709504944 -57 10 57.017302428   10.0 8.5     ~ 373 0
23 V* SS Vir C* 12 25 14.3948245008 +00 46 10.946740368 15.84 10.79 6.60     C-N4.5: 199 1
24 V* Y CVn C* 12 45 07.8260815656 +45 26 24.926308404 14.03 7.41 4.87 3.12 1.74 C-N5 469 0
25 V* RU Vir C* 12 47 18.4090087128 +04 08 41.356415148   14.75 9.00     C8,1e 169 0
26 V* RY Dra C* 12 56 25.9112361600 +65 59 39.811665876 15.56 9.44 6.34 4.34 2.91 C-N3III: 232 0
27 IRAS 13416-6243 pA* 13 45 07.2573421656 -62 58 16.835990124           G1I 42 0
28 [W71b] 096-06 C* 14 41 03.2028580368 -62 45 57.798192420     11.1     C 13 0
29 WOS 48 C* 15 23 05.0730770544 -51 25 58.762691652   17.85 16.66 14.51 10.18 C 126 1
30 V* V CrB C* 15 49 31.3121978280 +39 34 17.892629256     6.90     C6,2e_MS3 255 0
31 PN K 2-16 PN 16 44 49.0522431864 -28 04 04.706514300   13.18 12.75     [WC11] 90 0
32 IRAS 16594-4656 pA* 17 03 10.0705512504 -47 00 27.731886516           B7 85 0
33 CD-40 11335 C* 17 20 46.1595086736 -40 23 17.909817036   12.28 9.67     C6,3 40 0
34 NGC 6369 PN 17 29 20.4566510904 -23 45 34.771819248   16.6 12.00     [WC4] 312 0
35 IRC +20326 C* 17 31 55.3280201904 +17 45 20.978184672   15.54 14.48 14.38   C 75 0
36 CD-49 11554 pA* 17 35 02.4970127232 -49 26 26.379787848 10.57 11.14 10.74     B1Iae 55 0
37 PN Hb 5 PN 17 47 56.20 -29 59 39.6   10.50 10.78     ~ 261 0
38 V* T Dra C* 17 56 23.3288487384 +58 13 06.783372804   18.08 7.20     C6,2e 182 0
39 RAFGL 5416 C*? 17 56 36.507 -30 30 46.50           ~ 32 0
40 NGC 6572 PN 18 12 06.3181909152 +06 51 13.027935240   9.3 10.8     [WC] 746 0
41 RAFGL 2155 C* 18 26 05.83560 +23 28 46.6932         17.63 C-rich 80 0
42 PN M 2-43 PN 18 26 40.0500205632 -02 42 57.364170912     15.7     [WC7/8] 116 0
43 V* T Lyr C* 18 32 20.0767626264 +36 59 55.635218376   12.74 7.84 7.30   C-J4:p 177 1
44 Case 176 C* 18 42 24.8730446016 -02 17 27.088299816   16.56 13.49 15.53 10.79 C 71 0
45 RAFGL 2256 AB? 18 49 10.41384 -06 53 02.8284           ~ 22 0
46 V* S Sct C* 18 50 20.0367791256 -07 54 27.429169356 13.93 9.89 6.80     C-N5 203 0
47 PN K 3-17 PN 18 56 18.164 +07 07 25.88           ~ 63 1
48 Case 181 C* 19 03 18.4284440280 +07 30 45.340262352     14.22 14.77   C 69 0
49 V* V Aql C* 19 04 24.1544971752 -05 41 05.444321424   11.09 6.90     C-N5 208 0
50 IRAS 19068+0544 C* 19 09 15.7350591120 +05 49 09.601840056           C-rich 23 0
51 NGC 6790 PN 19 22 56.966 +01 30 46.46   12.52 10.45     wels 316 0
52 V* V1421 Aql C* 19 27 14.7581047608 +07 04 12.671205564     14.30 14.69   C7,3e 47 0
53 NGC 6826 PN 19 44 48.1500225888 +50 31 30.249034932   10.21 9.6     O6fp 713 0
54 IRAS 19454+2920 pA? 19 47 24.8045352600 +29 28 10.765023096           C-rich 46 0
55 HD 187885 pA* 19 52 52.7033593752 -17 01 50.289441096   9.25 8.68 8.32   F2/6Ia 174 0
56 RAFGL 2477 S* 19 56 48.4423076904 +30 44 02.604494580   17.9 14.8 14.1   M6SIII 54 1
57 IRAS 19584+2652 C* 20 00 31.303 +27 00 39.41           C-rich 9 0
58 IRAS 20000+3239 LP* 20 01 59.5133268456 +32 47 32.799122916   16.13 13.39 11.80 10.32 ~ 75 0
59 V* V Cyg C* 20 41 18.2676815496 +48 08 28.810980420   14.05 7.70     C7,4eJ 298 0
60 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 855 1
61 RAFGL 2699 C* 21 04 14.5277061504 +53 21 04.764238236     15.40     C8,3e 41 0
62 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2408 1
63 IC 5117 PN 21 32 30.97 +44 35 47.5     16.7     ~ 294 0
64 RAFGL 5625S C* 21 33 22.795 +56 44 34.52           C 56 0
65 V* S Cep C* 21 35 12.8233100592 +78 37 28.185141792   12.13 7.40     C7,3e 255 0
66 V* V460 Cyg C* 21 42 01.0830893088 +35 30 36.719916552 12.97 8.32 5.84 4.10 2.71 C-N5 206 1
67 LEE 338 C* 21 44 28.7966422416 +73 38 04.892089668   13.27 9.82 8.47   C6-,3e 55 0
68 IRAS 21489+5301 C* 21 50 44.90 +53 15 27.9           C-rich 38 0
69 HD 235858 pA* 22 29 10.3748806056 +54 51 06.344572284   11.40 9.52 8.47 7.34 G5Ia 244 0
70 IRAS 22303+5950 C* 22 32 12.528 +60 06 04.13           C-rich 25 0
71 IRAS 22574+6609 pA* 22 59 18.3496246536 +66 25 47.940897972       19.2   A1-6I 55 0
72 RAFGL 3068 C* 23 19 12.60744 +17 11 33.1332           C 263 0
73 RAFGL 3099 C* 23 28 17.1145171968 +10 54 37.402209036           C-rich 89 0
74 IRAS 23304+6147 pA* 23 32 44.7858431592 +62 03 49.090372272   15.36 12.99 12.23 10.50 G2Ia 110 0
75 IRAS 23321+6545 pA* 23 34 22.48 +66 01 51.7           C-rich 45 0
76 IRC +40540 C* 23 34 27.5185864392 +43 33 01.323347256     15.12     C8,3.5eJ 174 0
77 * 19 Psc C* 23 46 23.5164473376 +03 29 12.519049272 10.95 7.62 5.02 3.19 1.82 C-N6 440 0

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2022.09.26-07:25:27

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