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


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST08:20:32

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 - 2021
#notes
1 NGC 40 PN 00 13 01.0170260109 +72 31 19.032886305   11.63 11.46     [WC8] 595 2
2 IRAS 00210+6221 C*? 00 23 50.861 +62 38 10.85           ~ 39 1
3 GSC 04501-00166 pA* 01 04 45.5102402311 +79 26 46.354274761   11.04 10.87 10.85   B1.7Ibeq 69 0
4 V* HV Cas C* 01 11 03.4682980461 +53 43 40.237002902     12.90     C4,3e 78 0
5 RAFGL 190 C* 01 17 51.378 +67 13 53.34           C-rich 66 0
6 V* R Scl C* 01 26 58.0946233986 -32 32 35.437732667 17.26 9.59 5.72 3.69 2.30 C-N5+ 305 0
7 IRAS Z02229+6208 pA* 02 26 41.7848292289 +62 21 21.976769830   14.69 12.00 11.16 8.92 G8-K0_0-Ia: 52 0
8 V* R For C* 02 29 15.3081251463 -26 05 55.647016467   12.94 7.50     C4,3e 184 0
9 RAFGL 341 C* 02 33 00.34296 +58 02 06.2340           C-rich 51 0
10 LEE 259 C* 03 26 29.5050382299 +47 31 48.463099623           N 169 0
11 RAFGL 5098 C* 03 35 31.458 +61 08 50.05           C-rich 27 0
12 V* U Cam C* 03 41 48.1762532767 +62 38 54.397016016   11.5 11.00     C-N5 235 0
13 IRAS 04296+3429 pA* 04 32 56.9768181234 +34 36 12.505781495   16.13 14.09 13.64 11.64 G0Ia 138 0
14 RAFGL 618 pA* 04 42 53.6245215366 +36 06 53.397219192   16.32   12.59   C-rich 967 0
15 V* W Ori C* 05 05 23.7201883024 +01 10 39.459119918 16.36 9.52 6.10 3.83 2.35 C-N5 279 0
16 IC 418 PN 05 27 28.2060343141 -12 41 50.282659007   9.78 13.0     O7fp 1006 2
17 V* V636 Mon C* 06 25 01.4312710669 -09 07 15.961984234       11.78 8.83 C-N5 50 0
18 RAFGL 940 C* 06 26 37.2746010730 +09 02 15.183190495           C 28 0
19 IRAS 06582+1507 C*? 07 01 08.634 +15 03 40.81           ~ 36 0
20 HD 56126 pA* 07 16 10.2589670319 +09 59 47.953674864   9.20 8.32     F0/5Ia 307 0
21 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2191 0
22 NGC 3918 PN 11 50 17.7723407998 -57 10 57.059135256   10.0 8.5     ~ 366 0
23 V* SS Vir C* 12 25 14.3952079721 +00 46 10.946733968 15.84 10.79 6.60     C-N4.5: 196 1
24 V* Y CVn C* 12 45 07.8257032577 +45 26 24.898861195 14.03 7.41 4.87 3.12 1.74 C-N5 464 0
25 V* RU Vir C* 12 47 18.4075712853 +04 08 41.364022128   14.75 9.00     C8,1e 168 0
26 V* RY Dra C* 12 56 25.9123940873 +65 59 39.809927879 15.56 9.44 6.34 4.34 2.91 C-N3III: 229 0
27 IRAS 13416-6243 pA* 13 45 07.2570740611 -62 58 16.832906949           G1I 41 0
28 [W71b] 096-06 C* 14 41 03.2050828724 -62 45 58.063207379     11.1     C 13 0
29 WOS 48 C* 15 23 05.0744336371 -51 25 58.881494593   17.85 16.66 14.51 10.18 C 124 1
30 V* V CrB C* 15 49 31.3129356625 +39 34 17.889392903     6.90     C6,2e_MS3 254 0
31 PN K 2-16 PN 16 44 49.0523721067 -28 04 04.705394782   13.18 12.75     [WC11] 85 0
32 IRAS 16594-4656 pA* 17 03 10.0710345261 -47 00 27.733590141           B7 84 0
33 CD-40 11335 C* 17 20 46.1606725395 -40 23 17.913037161   12.28 9.67     C6,3 39 0
34 NGC 6369 PN 17 29 20.4566547788 -23 45 34.771598164   16.6 12.00     [WC4] 305 0
35 IRC +20326 C* 17 31 55.3249026846 +17 45 20.812458717   15.54 14.48 14.38   C 73 0
36 CD-49 11554 pA* 17 35 02.4967489802 -49 26 26.381444972 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     ~ 253 0
38 V* T Dra C* 17 56 23.3278798922 +58 13 06.827212507   18.08 7.20     C6,2e 179 0
39 RAFGL 5416 C*? 17 56 36.507 -30 30 46.50           ~ 32 0
40 NGC 6572 PN 18 12 06.3140077888 +06 51 13.030152295   9.3 10.8     [WC] 740 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 40.0469091191 -02 42 57.485078141     15.7     [WC7/8] 113 0
43 V* T Lyr C* 18 32 20.0770614691 +36 59 55.619287018   12.74 7.84 7.30   C-J4:p 174 1
44 Case 176 C* 18 42 24.8714797393 -02 17 27.091013289   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 20.0367524071 -07 54 27.430964220 13.93 9.89 6.80     C-N5 198 0
47 PN K 3-17 PN 18 56 18.164 +07 07 25.88           ~ 60 1
48 Case 181 C* 19 03 18.4246882324 +07 30 45.317950309     14.22 14.77   C 68 0
49 V* V Aql C* 19 04 24.1548619887 -05 41 05.434251344   11.09 6.90     C-N5 207 0
50 IRAS 19068+0544 C* 19 09 15.7378533726 +05 49 09.591796614           C-rich 23 0
51 NGC 6790 PN 19 22 56.966 +01 30 46.46   12.52 10.45     wels 314 0
52 V* V1421 Aql C* 19 27 14.7564286220 +07 04 12.675856860     14.30 14.69   C7,3e 46 0
53 NGC 6826 PN 19 44 48.1500835472 +50 31 30.250916761   10.21 9.6     O6fp 704 0
54 IRAS 19454+2920 pA? 19 47 24.8041800277 +29 28 10.763294416           C-rich 46 0
55 HD 187885 pA* 19 52 52.7031438648 -17 01 50.293465852   9.25 8.68 8.32   F2/6Ia 171 0
56 RAFGL 2477 S* 19 56 48.4420056358 +30 44 02.609739938   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 59.5132264530 +32 47 32.808847821   16.13 13.39 11.80 10.32 ~ 74 0
59 V* V Cyg C* 20 41 18.2688237607 +48 08 28.886946369   14.05 7.70     C7,4eJ 296 0
60 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 840 1
61 RAFGL 2699 C* 21 04 14.5270005345 +53 21 04.761679777     15.40     C8,3e 40 0
62 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2363 1
63 IC 5117 PN 21 32 30.97 +44 35 47.5     16.7     ~ 291 0
64 RAFGL 5625S C* 21 33 22.795 +56 44 34.52           C 55 0
65 V* S Cep C* 21 35 12.8240104870 +78 37 28.201592479   12.13 7.40     C7,3e 250 0
66 V* V460 Cyg C* 21 42 01.0831986858 +35 30 36.713658662 12.97 8.32 5.84 4.10 2.71 C-N5 203 1
67 LEE 338 C* 21 44 28.7949996934 +73 38 04.888397245   13.27 9.82 8.47   C6-,3e 53 0
68 IRAS 21489+5301 C* 21 50 44.90 +53 15 27.9           C-rich 38 0
69 HD 235858 pA* 22 29 10.3755939027 +54 51 06.341145584   11.40 9.52 8.47 7.34 G5Ia 240 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 18.36 +66 25 48.2       19.2   A1-6I 55 0
72 RAFGL 3068 C* 23 19 12.60744 +17 11 33.1332           C 256 0
73 RAFGL 3099 C* 23 28 17.1148783705 +10 54 37.400631176           C-rich 89 0
74 IRAS 23304+6147 pA* 23 32 44.7854376478 +62 03 49.083515796   15.36 12.99 12.23 10.50 G2Ia 109 0
75 IRAS 23321+6545 pA* 23 34 22.48 +66 01 51.7           C-rich 45 0
76 IRC +40540 C* 23 34 27.5215563443 +43 33 01.299562617     15.12     C8,3.5eJ 173 0
77 * 19 Psc C* 23 46 23.5126056542 +03 29 12.505415198 10.95 7.62 5.02 3.19 1.82 C-N6 435 0

    Equat.    Gal    SGal    Ecl

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2021.06.17-08:20:32

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