2007A&A...471..551Q


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.06CET08:54:10

2007A&A...471..551Q - Astronomy and Astrophysics, volume 471, 551-560 (2007/8-4)

The chemical composition of the circumstellar envelopes around yellow hypergiant stars.

QUINTANA-LACACI G., BUJARRABAL V., CASTRO-CARRIZO A. and ALCOLEA J.

Abstract (from CDS):

The yellow hypergiant stars (YHGs) are extremely luminous and massive objects whose general properties are poorly known. Only two of this kind of star show massive circumstellar envelopes, IRC+10420 and AFGL2343. We aim to study the chemistry of the circumstellar envelopes around these two sources, by comparison with well known AGB stars and protoplanetary nebulae. We also estimate the abundances of the observed molecular species. We have performed single-dish observations of different transitions for twelve molecular species. We have compared the ratio of the intensities of the molecular transitions and of the estimated abundances in AFGL2343 and IRC+10420 with those in O-rich and C-rich AGB stars and protoplanetary nebulae. Both YHGs, AFGL2343, and IRC+10420, have been found to have an O-rich chemistry similar to that in O-rich AGB stars, though for AFGL2343 the emission of most molecules compared with 13CO lines is relatively weak. Clear differences with the other evolved sources appear when we compare the line intensity corrected for distance and the profile widths which are, respectively, very intense and very wide in YHGs. The abundances obtained for IRC+10420 agree with those found in AGB stars, but in general those found in AFGL2343, except for 13CO, are too low. This apparently low molecular abundance in AFGL2343 could be due to the fact that these molecules are present only in an inner region of the shell where the mass is relatively low.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: supergiants - stars: AGB and post-AGB - radio lines: stars - stars: individual: IRC+10420 - stars: individual: AFGL 2343

Simbad objects: 43

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Number of rows : 43

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 IRC +10011 OH* 01 06 25.9889735162 +12 35 52.890666456   20.7   18.26 14.01 M8 392 0
2 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1414 0
3 V* U Cam C* 03 41 48.1762532767 +62 38 54.397016016   11.5 11.00     C-N5 230 0
4 V* IK Tau Mi* 03 53 28.8884898148 +11 24 21.865959095 16.99 17.03 13.39 7.29 3.20 M7-11 560 0
5 V* GY Cam C* 04 35 17.5584381137 +62 16 23.759864277           C-rich 54 0
6 RAFGL 618 pA* 04 42 53.6245215366 +36 06 53.397219192   16.32   12.59   C-rich 944 0
7 V* TX Cam Mi* 05 00 51.1569959503 +56 10 54.093107078       14.02   M9-9.5 326 0
8 RAFGL 865 C* 06 04 00.047 +07 25 52.01           C-rich 94 0
9 V* UU Aur C* 06 36 32.8375658812 +38 26 43.833646997   7.89 5.25 3.31 1.90 C-N5- 289 1
10 HD 56126 pA* 07 16 10.2589670319 +09 59 47.953674864   9.20 8.32     F0/5Ia 301 0
11 V* VY CMa s*r 07 22 58.32877 -25 46 03.2355 12.01 10.19 7.95     M5Iae 984 0
12 OH 231.8 +4.2 OH* 07 42 16.947 -14 42 50.20           M10III+A 499 1
13 V* R Cnc Mi* 08 16 33.8242753267 +11 43 34.518296107 10.66 10.17 8.64 4.91 1.95 M6.5-9e 273 2
14 V* RS Cnc S* 09 10 38.7978379 +30 57 47.295961 8.65 7.62 5.95 3.06 0.73 M6S 295 0
15 V* R Leo Mi* 09 47 33.4839808805 +11 25 43.823283729 9.22 8.94 7.53 3.39 0.12 M7-9e 864 1
16 IRC +10216 C* 09 47 57.406 +13 16 43.56     10.96     C9,5e 2109 0
17 V* RW LMi C* 10 16 02.2834693816 +30 34 18.977096332       15.27   C4,3e 377 0
18 IRC -10236 C* 10 17 00.5764421884 -14 39 30.125586177       12.73 10.31 C 67 0
19 V* V Hya C* 10 51 37.2614060865 -21 15 00.339641553   12.23 6.80     C-N:6 335 0
20 V* Y CVn C* 12 45 07.8257032577 +45 26 24.898861195 14.03 7.41 4.87 3.12 1.74 C-N5 459 0
21 V* RT Vir AB* 13 02 37.9836301550 +05 11 08.360733054 10.07 9.07 7.41     M8III 293 0
22 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 591 0
23 V* RX Boo AB* 14 24 11.6240733185 +25 42 13.381760051   9.23 8.60     M7.5-M8 415 0
24 HD 161796 pA* 17 44 55.4696 +50 02 39.484 8.00 7.68 7.21 6.77 6.51 F3Ib 310 0
25 V* VX Sgr s*r 18 08 04.0431479808 -22 13 26.629744195 11.72 9.41 6.52 3.90 2.11 M8.5Ia 538 0
26 OH 17.7 -2.0 pA* 18 30 30.703 -14 28 57.04           ~ 132 1
27 OH 26.5 +0.6 OH* 18 37 32.51 -05 23 59.2           ~ 281 0
28 IRC +20370 C* 18 41 54.5507538243 +17 41 08.481183828       13.56   C7,3e 107 0
29 HD 179821 pA* 19 13 58.6083165753 +00 07 31.934676028 10.81 9.694 8.19     G4_0-Ia 218 0
30 V* UX Dra C* 19 21 35.5158242859 +76 33 34.549597671   8.81 5.94     C-N5 185 0
31 OH 44.8 -2.3 OH* 19 21 36.6418599501 +09 27 56.536908744           ~ 83 0
32 IRC +10420 pA* 19 26 48.0981288433 +11 21 16.756524951   13.98 11.66     F8Ia+e 448 0
33 IRC +30374 C* 19 34 10.0589829331 +28 04 08.361303564       16.22   C 75 0
34 HD 187885 pA* 19 52 52.7031438648 -17 01 50.293465852   9.25 8.68 8.32   F2/6Ia 170 0
35 IRC -10529 OH* 20 10 27.8733409252 -06 16 13.757843352         15.49 M: 130 0
36 V* V Cyg C* 20 41 18.2688237607 +48 08 28.886946369   14.05 7.70     C7,4eJ 290 0
37 NML Cyg s*r 20 46 25.5382179476 +40 06 59.396202678   18.64 16.60     M7/8 481 0
38 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 825 1
39 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2304 1
40 V* S Cep C* 21 35 12.8240104870 +78 37 28.201592479   12.13 7.40     C7,3e 245 0
41 RAFGL 3068 C* 23 19 12.607 +17 11 33.13           C 247 0
42 IRC +40540 C* 23 34 27.5215563443 +43 33 01.299562617     15.12     C8,3.5eJ 170 0
43 V* R Cas Mi* 23 58 24.8700291935 +51 23 19.691977266 6.71 6.63 4.80     M6.5-9e 674 0

    Equat.    Gal    SGal    Ecl

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2019.12.06-08:54:10

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