2007A&A...462..711G

Query : 2007A&A...462..711G

2007A&A...462..711G - Astronomy and Astrophysics, volume 462711-730 (2007/2-1)

Lithium and zirconium abundances in massive. Galactic O-rich AGB stars.

GARCIA-HERNANDEZ D.A., GARCIA-LARIO P., PLEZ B., MANCHADO A., D'ANTONA F., LUB J. and HABING H.

Abstract (from CDS):

Lithium and zirconium abundances (the latter taken as representative of s-process enrichment) are determined for a large sample of massive Galactic O-rich AGB stars, for which high-resolution optical spectroscopy has been obtained (R∼40000-50000). This was done by computing synthetic spectra based on classical hydrostatic model atmospheres for cool stars and using extensive line lists. The results are discussed in the framework of ``hot bottom burning'' (HBB) and nucleosynthesis models. The complete sample is studied for various observational properties such as the position of the stars in the IRAS two-colour diagram ([12]-[25] vs. [25]-[60]), Galactic distribution, expansion velocity (derived from the OH maser emission), and period of variability (when available). We conclude that a considerable fraction of these sources are actually massive AGB stars (M>3-4M☉) experiencing HBB, as deduced from the strong Li overabundances we found. A comparison of our results with similar studies carried out in the past for the Magellanic Clouds (MCs) reveals that, in contrast to MC AGB stars, our Galactic sample does not show any indication of s-process element enrichment. The differences observed are explained as a consequence of metallicity effects. Finally, we discuss the results obtained in the framework of stellar evolution by comparing our results with the data available in the literature for Galactic post-AGB stars and PNe.

Abstract Copyright: ∼

Journal keyword(s): stars: AGB and post-AGB - stars: abundances - stars: evolution - nuclear reactions, nucleosynthesis, abundances - stars: atmospheres - stars: late-type

Simbad objects: 126

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Number of rows : 126
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* WZ Cas C* 00 01 15.8567946264 +60 21 19.025920224 8.77 9.47 7.13     C-N7III: 321 0
2 V* R And S* 00 24 01.9457463096 +38 34 37.370144352 10.61 9.36 7.39 4.45 2.30 S5-7/4-5e 369 0
3 RAFGL 67 C* 00 27 41.1356449464 +69 38 51.575400420       18.4   C-rich 44 1
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
5 IRC +10011 OH* 01 06 25.9879717848 +12 35 52.896392052   20.7   18.26 14.01 M8 436 0
6 IRC +30021 OH* 01 11 15.9306739944 +30 38 06.270834804       13.73   M10 85 1
7 OH 127.8-00.0 OH* 01 33 51.21048 +62 26 53.2032           O-rich 188 0
8 CD-24 945 AB* 02 11 48.0114511440 -23 41 43.806915096   11.25 10.25     M6 10 0
9 V* S Per s*r 02 22 51.7113133056 +58 35 11.422774248 13.22 10.55 7.90     M4.5-7Iae 388 0
10 CIT 4 OH* 02 35 44.6711866704 +65 08 58.922331000       11.78   M9.5III 66 0
11 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
12 V* IK Tau OH* 03 53 28.8924743304 +11 24 21.895183368 16.99 14.463 16.171 14.101   M7-11 675 0
13 Case 720 C* 04 16 24.2218097520 +39 25 45.146309916       13.47   C 27 0
14 V* SY Men OH* 04 39 16.0791799392 -74 21 41.907210192           M9 33 0
15 V* T Lep Mi* 05 04 50.8451254800 -21 54 16.520551560   11.60 10.59     M6.5e 158 0
16 V* U Dor OH* 05 10 08.8413498888 -64 19 04.255801500   11.86 8.10     M8IIIe 67 0
17 IRC +50137 OH* 05 11 19.4506093584 +52 52 33.235824324           M10 180 0
18 IRC +60154 OH* 05 19 52.1469619752 +63 15 54.963480240       16.24   M9 73 0
19 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
20 IRC +40149 Mi* 05 59 24.9476977104 +38 25 38.551949328       13.13   M9-10 41 0
21 IRC +40156 OH* 06 33 15.7602909600 +40 42 50.988602196           M8 76 0
22 V* AP Lyn Mi* 06 34 33.3992529912 +60 56 27.812508252   12.51 11.15 11.90   M7+ 121 0
23 IRAS 07080-5948 OH* 07 08 46.7334387096 -59 53 30.030843516   14.109 12.334 15.290   O-rich 17 0
24 IRAS 07222-2005 Mi* 07 24 24.4245337224 -20 11 56.095515528     17.954   12.26 M9: 14 0
25 V* Z Pup Mi* 07 32 38.0640798624 -20 39 29.219695524   12.48 7.20 9.23   M4e 156 0
26 V* SS Pup OH* 07 46 38.2780695096 -26 20 35.814716736   12.99 11.66 10.91 9.09 M10 36 0
27 V* MQ Vel OH* 09 21 18.4676569224 -45 30 56.817261324           M7/9S? 13 0
28 IRAS 09425-6040 C* 09 44 01.6707336168 -60 54 25.639144812     12.6 11.81   C 61 0
29 V* IW Hya OH* 09 45 15.2390936088 -22 01 45.329402244     16     M8/9 116 0
30 V* V Ant OH* 10 21 09.1114116744 -34 47 18.744352944   12.592 11.140 9.429   M7IIIe 81 0
31 V* VZ Vel OH* 10 28 11.0083798248 -51 11 07.684927008   11.96 10.87     M6e 25 0
32 V* Z Ant S* 10 45 58.8770905272 -35 15 04.401660600   11.38 10.00     S5,4 34 0
33 SOPS IV d-119 Mi* 11 10 29.7415066944 -42 19 33.572953848   14.75 13.10 13.98 9.67 Me 15 0
34 IRAS 11525-5057 AB* 11 55 02.7902214936 -51 14 39.981994578   15.470 14.017 13.352   O-rich 14 0
35 IRAS 12377-6102 OH* 12 40 37.1810839984 -61 19 24.080785164         12.996 O-rich 13 0
36 IRAS 12384-4536 OH* 12 41 15.6481224576 -45 53 25.467341496           O-rich 21 0
37 IRAS 13203-5536 OH* 13 23 28.8057008461 -55 52 31.445709692         14.396 O-rich 13 0
38 IRAS 13328-6244 OH* 13 36 18.93096 -62 59 19.2120           O-rich 8 0
39 IRAS 13341-6246 OH* 13 37 38.7929690983 -63 01 51.131794667         17.037 O-rich 8 0
40 IRAS 13379-5426 OH* 13 41 10.8852180696 -54 41 40.818225768           O-rich 8 0
41 IRAS 13442-6109 OH* 13 47 46.1327197632 -61 24 29.790086868       15.28   M10 21 0
42 V* V618 Cen OH* 13 50 36.1816754688 -45 46 05.305142532   12.14 10.90     Me 18 0
43 IRAS 13517-6515 OH* 13 55 30.2255857876 -65 30 32.769653190         15.552 O-rich 13 0
44 RAFGL 1686 OH* 14 11 17.5995820440 -07 44 49.834416336       16.28   M9III 73 0
45 IRAS 14086-6907 OH* 14 12 50.4352492104 -69 21 09.430918344         13.134 O-rich 15 0
46 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
47 V* RS Vir Mi* 14 27 16.3912599864 +04 40 41.126332044   10.27 7.00     M8 220 0
48 IRAS 14266-4211 OH* 14 29 51.6394420440 -42 25 06.429698184           O-rich 10 0
49 IRAS 14337-6215 OH* 14 37 41.0440292160 -62 28 14.986120584           O-rich 10 0
50 RAFGL 4212 OH* 15 13 41.8316980776 -55 20 40.597683828         12.576 O-rich 17 0
51 V* S CrB Mi* 15 21 23.9553294936 +31 22 02.584877304 7.51 7.15 5.80 8.12   M6.5-8e 364 0
52 IRAS 15211-4254 OH* 15 24 32.5697087088 -43 04 38.625266352           O-rich 10 0
53 V* WX Ser Mi* 15 27 47.0420881992 +19 33 51.671456100       9.36   M8.5 215 0
54 IRAS 15303-5456 OH* 15 34 10.83048 -55 06 46.9188           O-rich 10 0
55 V* FS Lib OH* 16 00 23.7681792792 -12 20 57.331224456       13.802   M7/9 63 0
56 IRAS 15586-3838 OH* 16 01 57.2671494096 -38 46 47.576823348       15.47   O-rich 10 0
57 V* V1012 Her OH* 16 05 28.8972111504 +42 10 29.489337876           M8 25 0
58 V* V345 Nor Mi* 16 06 51.6849774312 -52 04 34.814139564     14.10     O-rich 14 1
59 IRC +30292 OH* 16 27 51.3484640808 +34 48 10.530202176       14.64   M9 89 0
60 V* RX Oph OH* 16 52 48.2058748824 +05 24 27.129013884     12.05 11.00   M5 57 0
61 V* V850 Oph Mi* 17 06 10.8048482688 -10 28 59.170261224     15     M8 25 0
62 IRAS 17103-0559 Mi* 17 12 58.1215757520 -06 02 56.931532620         11.63 O-rich 19 0
63 IRAS 17239-2812 OH* 17 27 05.4119801832 -28 15 29.906594784         16.861 O-rich 20 0
64 IRC +20326 C* 17 31 55.3280201904 +17 45 20.978184672   15.54 14.48 14.38   C 81 0
65 IRC -20375 AB* 17 38 59.6162182056 -21 40 22.879443648   11.80 10.41     M6 7 0
66 IRAS 17433-1750 s*r 17 46 15.61848 -17 51 47.9340           M2I 24 1
67 IRAS 17433-2523 OH* 17 46 24.9494821344 -25 25 00.958343988           O-rich 11 0
68 RAFGL 5386 OH* 17 47 27.48552 -25 20 14.2584           O-rich 16 0
69 RAFGL 2019 OH* 17 53 18.8416434624 -26 56 37.489065396           M8-9 79 0
70 IRC -20427 s*r 18 05 35.4932171856 -21 13 42.214590948       10.461   M3/4I 38 1
71 V* VX Sgr s*r 18 08 04.0442790744 -22 13 26.600899044 11.72 9.41 6.52 3.90 2.11 M8.5Ia 622 0
72 IRC -30363 OH* 18 08 51.9793839528 -26 16 21.098041608       16.300   M7/9 18 0
73 HD 315211 * 18 09 05.6395817500 -26 17 58.329453592   8.7 8.80     K5 4 0
74 OH 012.8+00.9 pA* 18 10 06.07608 -17 26 34.5480           O-rich 43 0
75 RAFGL 2086 OH* 18 11 27.5609850648 -26 29 32.513485524     19.895   16.42 O-rich 36 1
76 IRAS 18172-2305 OH* 18 20 20.1646931827 -23 03 50.480800479         13.801 O-rich 13 0
77 OH 018.2+00.4 OH* 18 22 43.08192 -12 47 41.5356           O-rich 42 0
78 OH 021.5+00.5 OH* 18 28 30.93720 -09 58 14.3184           O-rich 97 0
79 OH 023.7+01.2 OH* 18 30 06.96240 -07 36 51.5880           O-rich 42 0
80 OH 017.7-02.0 pA* 18 30 30.703 -14 28 57.04           O-rich 145 1
81 OH 024.2+00.6 OH* 18 33 09.7677332518 -07 27 58.425011534           O-rich 34 1
82 IRC -10434 Mi* 18 33 10.4329565808 -07 26 17.138213304       12.62   M7: 34 1
83 IRAS 18312-1209 AB* 18 34 02.25984 -12 06 50.1696           O-rich 9 0
84 RAFGL 2192 Mi* 18 34 16.3911704640 -11 29 29.180554440         12.23 M6: 25 0
85 OH 026.5+00.6 OH* 18 37 32.50920 -05 23 59.1936           O-rich 308 1
86 IRC +20370 C* 18 41 54.5501446200 +17 41 08.425834728       13.56   C7,3e 124 0
87 IRC +10374 Mi* 18 43 36.4589781480 +13 57 22.778360856           M7 58 0
88 V* V3952 Sgr OH* 18 45 51.3278270352 -17 17 59.660446020   12.77 11.61     M9 32 0
89 OH 030.7+00.4 OH* 18 45 52.39728 -01 46 42.4776           O-rich 71 1
90 OH 026.4-02.0 OH* 18 46 26.79792 -06 40 33.7512           O-rich 59 0
91 IRC -10463 AB* 18 48 17.5255777776 -12 22 43.154653152   13.18 11.05     M6 11 0
92 OH 030.1-00.7 OH* 18 48 41.98728 -02 50 29.5080           O-rich 107 0
93 OH 032.0-00.5 OH* 18 51 26.25600 -01 03 52.3620           O-rich 70 0
94 OH 035.6-00.3 OH* 18 57 27.47184 +02 12 16.9740           O-rich 50 0
95 RAFGL 2290 OH* 18 58 30.0951077544 +06 42 57.696212124           O-rich 131 0
96 IRC -20540 OH* 19 08 54.9247580040 -22 14 18.600288180     17 14.58 10.55 M8: 82 0
97 IRAS 19129+2803 Mi* 19 14 59.1059686992 +28 09 13.923038736           O-rich 18 0
98 V* TZ Cyg AB* 19 16 04.0631737056 +50 09 36.657757188   11.46 10.49 9.43   M6 23 0
99 V* T Sgr S* 19 16 14.4361485576 -16 58 17.076889992   11.81 7.10     S4.5-6/5.5-6e 143 0
100 RAFGL 2362 OH* 19 18 14.67048 +23 49 27.9444           O-rich 56 0
101 RAFGL 2361 OH* 19 18 39.6012991872 -17 01 04.139683176           O-rich 19 0
102 OH 044.8-02.3 OH* 19 21 36.6364189224 +09 27 56.688388992           O-rich 92 0
103 OH 051.8-00.2 OH* 19 27 42.03672 +16 37 23.9520           O-rich 42 0
104 IRC +30374 C* 19 34 10.0570246440 +28 04 08.361228288       16.22   C 77 0
105 RAFGL 2425 OH* 19 39 00.7388220744 -16 51 56.630561580           M10III 58 0
106 IRC +00450 OH* 19 43 45.2907550488 +03 44 30.297761124           M9 40 0
107 IRAS 19426+4342 OH* 19 44 15.9491719544 +43 49 19.515922016           O-rich 10 0
108 RAFGL 2494 C* 20 01 09.0530414424 +40 55 38.995072680           C 71 0
109 IRC +10451 OH* 20 07 43.0503248640 +06 03 11.971572300           M9 43 0
110 RAFGL 2513 C* 20 09 14.2555901784 +31 25 44.830603344           C-rich 51 0
111 IRC -10529 OH* 20 10 27.8731455576 -06 16 13.758742596         15.49 M: 153 0
112 V* V557 Cyg OH* 20 12 57.9669308760 +32 14 56.362739244     12.64 9.85   M9 32 0
113 V* WX Cyg C* 20 18 33.2742966672 +37 26 59.080236792   12.95 8.80 8.42   C-J6 146 0
114 IRAS 20181+2234 OH* 20 20 21.9211632504 +22 43 48.541726740           O-rich 24 0
115 OH 075.3-01.8 OH* 20 29 08.58696 +35 45 43.4916           O-rich 42 0
116 IRC +40435 Mi* 20 36 57.0424919136 +37 52 34.012265088     15.00 10.13   M9 32 0
117 V* RT Mic Mi* 20 37 22.9200861336 -30 10 26.175840204           O-rich 22 0
118 RAFGL 2885 OH* 22 19 27.47784 +59 51 21.7080           O-rich 140 0
119 V* YZ Peg OH* 22 20 20.1194115144 +32 40 27.427329408       11.27   M6/7 24 0
120 V* V708 Cep OH* 22 48 14.0220169728 +69 58 28.527467376           M6 23 0
121 IRC +40525 OH* 22 53 20.3734055472 +36 30 26.087411700   12.69 11.15 12.18   M7 21 0
122 RAFGL 3068 C* 23 19 12.60744 +17 11 33.1332           C 288 1
123 IRC +40540 C* 23 34 27.5185864392 +43 33 01.323347256     15.12     C8,3.5eJ 184 0
124 V* PZ Cas s*r 23 44 03.2814215136 +61 47 22.190200476 12.80 11.48 8.90 6.08 3.90 M3Ia 210 0
125 BD+08 5128 AB* 23 51 47.8834478496 +09 03 23.158128528   11.35 10.04     M5.5 12 0
126 V* WY Cas S* 23 58 01.3064089800 +56 29 13.475449716   12.48 10.76 10.68   S6-6.5/6-e 83 0

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