2003A&A...411..123G


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.13CEST16:52:25

2003A&A...411..123G - Astronomy and Astrophysics, volume 411, 123-147 (2003/11-4)

``Thermal'' SiO radio line emission towards M-type AGB stars: A probe of circumstellar dust formation and dynamics.

GONZALEZ-DELGADO D., OLOFSSON H., KERSCHBAUM F., SCHOEIER F.L., LINDQVIST M. and GROENEWEGEN M.A.T.

Abstract (from CDS):

An extensive radiative transfer analysis of circumstellar SiO ``thermal'' radio line emission from a large sample of M-type AGB stars has been performed. The sample contains 18 irregulars of type Lb (IRV), 7 and 34 semiregulars of type SRa and SRb (SRV), respectively, and 12 Miras. New observational data, which contain spectra of several ground vibrational state SiO rotational lines, are presented. The detection rate was about 60% (44% for the IRVs, and 68% for the SRVs). SiO fractional abundances have been determined through radiative transfer modelling. The abundance distribution of the IRV/SRV sample has a median value of 6x10–6, and a minimum of 2x10–6 and a maximum of 5x10–5. The high mass-loss rate Miras have a much lower median abundance, ≲10–6. The derived SiO abundances are in all cases well below the abundance expected from stellar atmosphere equilibrium chemistry, on average by a factor of ten. In addition, there is a trend of decreasing SiO abundance with increasing mass-loss rate. This is interpreted in terms of depletion of SiO molecules by the formation of silicate grains in the circumstellar envelopes, with an efficiency which is high already at low mass-loss rates and which increases with the mass-loss rate. The high mass-loss rate Miras appear to have a bimodal SiO abundance distribution, a low abundance group (on average 4x10–7) and a high abundance group (on average 5x10–6). The estimated SiO envelope sizes agree well with the estimated SiO photodissociation radii using an unshielded photodissociation rate of 2.5x10–10/s. The SiO and CO radio line profiles differ in shape. In general, the SiO line profiles are narrower than the CO line profiles, but they have low-intensity wings which cover the full velocity range of the CO line profile. This is interpreted as partly an effect of selfabsorption in the SiO lines, and partly (as has been done also by others) as due to the influence of gas acceleration in the region which produces a significant fraction of the SiO line emission. Finally, a number of sources which have peculiar CO line profiles are discussed from the point of view of their SiO line properties.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - circumstellar matter - stars: mass-loss - stars: late-type - radio lines: stars

CDS comments: Appendix A1 : IRAS 19089+6601 is a misprint for IRAS 19098+6601.

Simbad objects: 73

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Number of rows : 73

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 V* KU And Mi* 00 06 52.7551927308 +43 05 02.356209801       14.12   M10 76 0
2 V* UY Cet AB* 00 27 06.4484430547 -06 36 16.871502759   10.61 9.32     M7 45 0
3 IRC +10011 OH* 01 06 25.9889735162 +12 35 52.890666456   20.7   18.26 14.01 M8 406 0
4 V* SV Psc LP* 01 46 35.3431764434 +19 05 04.552414389   10.02 8.773 8.41   M5 41 0
5 V* UX And LP* 02 33 28.7515494384 +45 39 16.208092600   10.03 8.69     M6IIIv 40 0
6 V* T Ari Mi* 02 48 19.7408549883 +17 30 33.790760906   10.29 7.50     M6-8+e 112 0
7 V* SS Cep LP* 03 49 30.0055783284 +80 19 20.925193246   8.37 7.16     M5III 53 0
8 V* IK Tau Mi* 03 53 28.8884898148 +11 24 21.865959095 16.99 17.03 13.39 7.29 3.20 M7-11 589 0
9 V* U Men Mi* 04 09 35.8919 -81 51 17.574   10.55 8.00     M3 53 1
10 V* RV Cam LP* 04 30 41.6809944120 +57 24 42.303400198   9.65 8.20     M4II-III 56 0
11 V* R Dor AB* 04 36 45.59127 -62 04 37.7974 7.84 6.98 5.40 2.71 -0.44 M8III:e 300 0
12 V* TX Cam Mi* 05 00 51.1569959503 +56 10 54.093107078       14.02   M9-9.5 334 0
13 IRC +50137 Mi* 05 11 19.4489549676 +52 52 33.222548186           M10 172 0
14 V* EX Ori LP* 05 24 28.8519295560 -06 08 49.809109129   11.19 9.98     M7III: 34 1
15 V* RW Lep Mi* 05 38 52.7352748973 -14 02 26.820387785   11.78 10.65     M8 34 0
16 V* V352 Ori LP* 06 01 46.922 -02 21 13.58   8.842 7.547     M6III 30 0
17 V* GX Mon OH* 06 52 47.0411386021 +08 25 19.131304542   15.40 15.46 10.56   M9 110 0
18 * L02 Pup AB* 07 13 32.3181035 -44 38 23.062946 7.90 6.66 5.10 2.49 0.07 M5IIIe 199 0
19 V* FZ Hya LP* 08 21 33.3027035773 +04 57 30.249557626   10.01 9.078 8.799   M 27 0
20 V* CW Cnc LP* 09 08 26.5427117208 +13 13 13.612715596   10.23 9.15     M6 49 0
21 V* R Leo Mi* 09 47 33.4839808805 +11 25 43.823283729 9.22 8.94 7.53 3.39 0.12 M7-9e 886 1
22 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2189 0
23 V* SU Vel LP* 09 50 02.5610278528 -42 01 13.317351720   10.20 8.95     M5(III) 21 0
24 V* BI Car Mi* 10 43 30.6589993107 -63 29 02.804778363     12.90     M7 16 0
25 V* R Crt AB* 11 00 33.8541158313 -18 19 29.574953304   10.33 9.80     M7/8III 202 0
26 V* CS Dra LP* 11 15 55.9097624856 +75 08 34.581570821   12.19 10.62     M5 28 0
27 V* AZ UMa LP* 11 47 13.8038565362 +43 28 15.941762258   10.02 8.74     M6III 45 0
28 V* RW Vir LP* 12 07 14.9036822445 -06 45 56.079836670   8.60 7.18     M5II 41 0
29 V* BK Vir AB* 12 30 21.0150535628 +04 24 59.159360514 9.60 8.82 7.28     M7-III: 136 0
30 V* Y UMa AB* 12 40 21.2821521006 +55 50 47.603974534   9.66 7.70     M7II-III: 85 0
31 V* RT Vir AB* 13 02 37.9836301550 +05 11 08.360733054 10.07 9.07 7.41     M8III 302 0
32 V* SW Vir AB* 13 14 04.3908742003 -02 48 25.155302846 9.24 8.52 6.85     M7III: 253 0
33 V* V CVn Mi* 13 19 27.7670621532 +45 31 37.650912993 9.55 8.39 6.74     M4-M6e 160 0
34 V* R Hya Mi* 13 29 42.7818674 -23 16 52.774679 7.26 6.58 4.97 2.27 -0.15 M6-9e 466 0
35 V* V744 Cen LP* 13 39 59.8066660 -49 56 59.839473 8.65 7.50 6.00     M6III 72 0
36 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 612 0
37 * g Cen LP* 13 49 26.7217509 -34 27 02.792908 7.15 5.69 4.19 2.06 0.19 M5-III: 136 0
38 * tet Aps LP* 14 05 19.8778357 -76 47 48.320384 8.10 7.05 5.50     M6.5III: 114 0
39 V* RX Boo AB* 14 24 11.6240733185 +25 42 13.381760051   9.23 8.60     M7.5-M8 426 0
40 V* RV Boo AB* 14 39 15.8621749276 +32 32 22.267414023   9.50 7.90     M5-6IIIe 90 0
41 * tau04 Ser LP* 15 36 28.1823639850 +15 06 05.189204744 8.64 7.64 6.25     M5IIIa 99 0
42 V* X Her AB* 16 02 39.1738474892 +47 14 25.258160301   7.64 6.58     M6III 227 0
43 * g Her AB* 16 28 38.5485851 +41 52 54.040593 7.70 6.53 5.01 2.49 0.26 M6-III 367 0
44 V* S Dra AB* 16 42 55.8838841026 +54 54 13.710698410   10.06 8.83     M6III 59 0
45 V* AH Dra LP* 16 48 16.6338599568 +57 48 49.344422845   8.91 7.69     M5 47 0
46 V* TY Dra LP* 17 37 00.1128428283 +57 44 25.297190653   10.61 9.30     M8 51 0
47 * nu. Pav SB* 18 31 22.4250858 -62 16 41.885313 4.14 4.53 4.64     B7III 62 0
48 IRC +10365 Mi* 18 37 19.2595666948 +10 25 42.492197977           M9 140 0
49 V* CZ Ser LP* 18 37 20.9855772513 -02 39 14.833638074   12.59 10.49     M6 21 0
50 IRC -30398 AB* 18 59 13.8657889129 -29 50 20.243409063   14.35 14.19 15.46   M9 44 0
51 V* SU Sgr AB* 19 03 43.7538864726 -22 42 42.992800144   9.75 8.42     M7III 53 0
52 V* SZ Dra LP* 19 10 02.3377615888 +66 06 09.980037211   9.87 8.51     M5III 30 0
53 V* V Tel LP* 19 18 14.6117223850 -50 26 48.373405167   10.93 10.30     M6/8 29 0
54 V* S Pav Mi* 19 55 13.9622335061 -59 11 44.310533941   9.25 8.21     M8III 82 0
55 V* V1943 Sgr AB* 20 06 55.2458545503 -27 13 29.754314126   9.25 8.04     M7/8III 71 0
56 IRC -10529 OH* 20 10 27.8733409252 -06 16 13.757843352         15.49 M: 135 0
57 V* V584 Aql LP* 20 10 29.8268440923 -01 37 40.824383690   10.55 9.19     M4(III) 28 0
58 V* Y Tel LP* 20 20 14.2808224423 -50 42 11.478180699   10.45 9.35     M7III 21 0
59 V* UU Dra AB* 20 24 03.5570402053 +75 15 13.589177960   10.59 9.32     M8III 39 0
60 V* T Mic AB* 20 27 55.1872307024 -28 15 39.798200611   8.33 6.74     M7/8III 85 0
61 V* TZ Aql LP* 20 30 18.4680636256 -04 45 16.656723639   10.06 8.70     M6III 29 0
62 V* U Del LP* 20 45 28.2346290884 +18 05 24.121730767 9.30 8.06 6.38     M4-6II-III 115 0
63 V* W Cyg LP* 21 36 02.4961902 +45 22 28.529170 8.21 6.97 5.38 3.03 0.89 M4e-M6eIII 176 0
64 V* EP Aqr AB* 21 46 31.8467491729 -02 12 45.901666975   7.93 6.78     M7-III: 220 0
65 V* TW Peg AB* 22 03 59.5123043952 +28 20 54.257898504   8.66 7.50     M6-7III 126 0
66 V* SV Peg AB* 22 05 42.0786146097 +35 20 54.546608083   10.06 9.20     M7 126 0
67 V* AB Aqr LP* 22 38 34.6193737921 -14 02 14.421085011   10.50 9.23     M7 29 0
68 V* V PsA AB* 22 55 19.6818797314 -29 36 44.522048169   10.18 9.30     M7/8III 47 0
69 V* BC And LP* 23 00 53.0741261672 +46 30 38.123141880   10.52 9.11     M7III: 18 0
70 V* Y Scl LP* 23 09 05.5603140187 -30 08 02.144630134   9.86 8.70     M6III 47 0
71 V* SV Aqr LP* 23 22 45.3625989510 -10 49 00.065968329   10.91 9.83     M8 30 0
72 V* RS And Mi* 23 55 21.7438648869 +48 38 17.750694588   9.65 8.38     ~ 42 0
73 V* R Cas Mi* 23 58 24.8700291935 +51 23 19.691977266 6.71 6.63 4.80     M6.5-9e 686 0

    Equat.    Gal    SGal    Ecl

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2021.05.13-16:52:25

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