2001A&A...367..189L


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET07:23:24

2001A&A...367..189L - Astronomy and Astrophysics, volume 367, 189-198 (2001/2-3)

Modeling of C stars with core/mantle grains: amorphous carbon + SiC.

LORENZ-MARTINS S., DE ARAUJO F.X., CODINA-LANDABERRY S.J., DE ALMEIDA W.G. and DE NADER R.V.

Abstract (from CDS):

A set of 45 dust envelopes of carbon stars has been modeled. Among them, 34 were selected according to their dust envelope class (as suggested by Sloan et al., 1998) and 11 are extreme carbon stars. The models were performed using a code that describes the radiative transfer in dust envelopes considering core/mantle grains composed by an α-SiC core and an amorphous carbon (A.C.) mantle. In addition, we have also computed models with a code that considers two kinds of grains - α-SiC and A.C. - simultaneously. Core-mantle grains seem to fit dust envelopes of evolved carbon stars, while two homogeneous grains are more able to reproduce thinner dust envelopes. Our results suggest that there exists an evolution of dust grains in the carbon star sequence. In the beginning of the sequence, grains are mainly composed of SiC and amorphous carbon; with dust envelope evolution, carbon grains are coated in SiC. This phenomena could perhaps explain the small quantity of SiC grains observed in the interstellar medium. However, in this work we consider only α-SiC grains, and the inclusion of β-SiC grains can perhaps change some of these results.

Abstract Copyright:

Journal keyword(s): stars: carbon - circumstellar matter - radiative transfer

Simbad objects: 48

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Number of rows : 48

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* WZ Cas C* 00 01 15.8567004789 +60 21 19.023491384 8.77 9.47 9.40     C-N7III: 301 0
2 V* VX And C* 00 19 54.0156326103 +44 42 33.898137380   12.23 7.80     C-J4.5 148 0
3 V* R Scl C* 01 26 58.0946233986 -32 32 35.437732667 17.26 9.59 5.72 3.69 2.30 C-N5+ 301 0
4 V* R For C* 02 29 15.3081251463 -26 05 55.647016467   12.94 7.50     C4,3e 181 0
5 HD 19557 C* 03 11 25.3267420918 +57 54 11.227599898   10.04 8.59 7.86   C-J4 90 0
6 V* U Cam C* 03 41 48.1762532767 +62 38 54.397016016   11.5 11.00     C-N5 231 0
7 V* ST Cam C* 04 51 13.3478339517 +68 10 07.646494913   9.77 9.20     C-N5 137 0
8 V* TT Tau C* 04 51 31.2647165772 +28 31 36.867948885   11.0 10.20     C-N5+ 87 0
9 V* R Lep C* 04 59 36.3480393629 -14 48 22.511432606 15.06 13.51 7.76 4.90 3.42 C7,6e 318 0
10 V* W Ori C* 05 05 23.7201883024 +01 10 39.459119918 16.36 9.52 6.10 3.83 2.35 C-N5 275 0
11 RAFGL 799 C* 05 40 36.9258462564 +13 48 22.431306969       12.24   C8,4J 39 0
12 V* W Pic C* 05 43 13.8312608587 -46 27 13.823901997   12.52 11.80     C-J5 62 0
13 RAFGL 809 C* 05 43 49.6869879023 +32 42 06.161816018           C-rich 60 0
14 V* Y Tau C* 05 45 39.4116657307 +20 41 42.150008983 15.71 9.90 6.90 4.69 3.19 C-N5- 212 1
15 V* AZ Aur C* 06 01 07.2282231140 +39 40 14.205152268   13.20 10.50     C8,2e 58 0
16 RAFGL 865 C* 06 04 00.04728 +07 25 52.0104           C-rich 97 0
17 V* BL Ori C* 06 25 28.1733900221 +14 43 19.186665187 11.64 8.31 6.00 4.28 2.98 C-N5- 190 0
18 RAFGL 954 C* 06 32 42.1604006642 +43 17 13.248752285   16.56 12.48 11.72   C-rich 36 0
19 V* UU Aur C* 06 36 32.8375658812 +38 26 43.833646997   7.89 5.25 3.31 1.90 C-N5- 291 1
20 RAFGL 971 C* 06 36 54.2442987630 +03 25 28.677658825       18.4   C5,9e 64 0
21 V* CL Mon C* 06 55 36.6908412468 +06 22 43.192362346   12.69 11.00     C-J:6 88 0
22 V* R Vol C* 07 05 36.2092864981 -73 00 52.021676008   14.24 8.70     Ce 79 0
23 V* RY Mon C* 07 06 56.4751624597 -07 33 26.504953250   11.94 7.50     C-N5 86 0
24 V* W CMa C* 07 08 03.4363216943 -11 55 23.793216538 13.44 8.98 6.56 4.86 3.51 C-N5 112 0
25 RAFGL 1085 C* 07 12 04.0043153652 -20 17 23.119072103       14.43   C 56 0
26 [W71b] 021-06 C* 08 10 48.8880116748 -32 52 05.632853161       15.07 12.76 C 53 0
27 V* T Cnc C* 08 56 40.146 +19 50 56.95   12.07 7.60     C-N5 129 1
28 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2156 0
29 V* U Ant C* 10 35 12.8508908507 -39 33 45.320533564 15.32 8.22 5.38 3.18 1.86 C-N3 138 0
30 V* U Hya C* 10 37 33.2729535 -13 23 04.352923 13.29 7.51 4.82 3.05 1.78 C-N5 287 0
31 V* V Hya C* 10 51 37.2614060865 -21 15 00.339641553   12.23 6.80     C-N:6 343 0
32 V* SS Vir C* 12 25 14.3952079722 +00 46 10.946733968 15.84 10.79 6.60     C-N4.5: 192 1
33 V* Y CVn C* 12 45 07.8257032577 +45 26 24.898861195 14.03 7.41 4.87 3.12 1.74 C-N5 462 0
34 V* RU Vir C* 12 47 18.4075712853 +04 08 41.364022128   14.75 9.00     C8,1e 166 0
35 V* RY Dra C* 12 56 25.9123940873 +65 59 39.809927879 15.56 9.44 6.34 4.34 2.91 C-N3III: 224 0
36 RAFGL 4211 C* 15 11 41.4387312231 -48 19 58.763122448           C-rich 47 0
37 V* X TrA C* 15 14 19.1744832785 -70 04 46.126632480 15.88 9.19 5.81     C5,5 107 0
38 WOS 48 C* 15 23 05.0744336371 -51 25 58.881494593   17.85 16.66 14.51 10.18 C 121 1
39 RAFGL 2155 C* 18 26 05.83560 +23 28 46.6932         17.63 C-rich 79 0
40 RAFGL 2154 C* 18 26 39.4805634904 -06 54 03.594990247         14.72 C-rich 39 0
41 V* T Lyr C* 18 32 20.0770614691 +36 59 55.619287018   12.74 7.84 7.30   C-J4:p 172 1
42 V* V Aql C* 19 04 24.1548619887 -05 41 05.434251344   11.09 6.90     C-N5 204 0
43 V* AX Cyg C* 19 57 12.5070124708 +44 15 40.033878504 12.97 11.28 7.85     C-N5- 82 0
44 RAFGL 2494 C* 20 01 09.0488458825 +40 55 39.036558501           C 64 0
45 RAFGL 2686 C* 20 59 09.5922788988 +27 26 38.604197392           C8-9,5eJ 50 1
46 V* RV Aqr C* 21 05 51.7378981699 -00 12 42.121668132     11.5     C6,3e 97 0
47 V* V460 Cyg C* 21 42 01.0831986858 +35 30 36.713658662 12.97 8.32 5.84 4.10 2.71 C-N5 200 1
48 RAFGL 3099 C* 23 28 17.1148783705 +10 54 37.400631176           C-rich 88 0

    Equat.    Gal    SGal    Ecl

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2020.10.28-07:23:24

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