2005A&A...433..185B


Query : 2005A&A...433..185B

2005A&A...433..185B - Astronomy and Astrophysics, volume 433, 185-203 (2005/4-1)

α-, r-, and s-process element trends in the Galactic thin and thick disks.

BENSBY T., FELTZING S., LUNDSTROEM I. and ILYIN I.

Abstract (from CDS):

From a detailed elemental abundance analysis of 102 F and G dwarf stars we present abundance trends in the Galactic thin and thick disks for 14 elements (O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Zn, Y, Ba, and Eu). Stellar parameters and elemental abundances (except for Y, Ba and Eu) for 66 of the 102 stars were presented in our previous studies (Bensby et al., 2003A&A...410..527B and 2004A&A...415..155B). The 36 stars that are new in this study extend and confirm our previous results and allow us to draw further conclusions regarding abundance trends. The s-process elements Y and Ba, and the r-element Eu have also been considered here for the whole sample for the first time. With this new larger sample we now have the following results: 1) smooth and distinct abundance trends that for the thin and thick disks are clearly separated; 2) the α-element trends for the thick disk show typical signatures from the enrichment of SNIa; 3) the thick disk stellar sample is in the mean older than the thin disk stellar sample; 4) the thick disk abundance trends are invariant with galactocentric radii (Rm); 5) the thick disk abundance trends appear to be invariant with vertical distance (Zmax) from the Galactic plane. Adding further evidence from the literaure we argue that a merger/interacting scenario with a companion galaxy to produce a kinematical heating of the stars (that make up today's thick disk) in a pre-existing old thin disk is the most likely formation scenario for the Galactic thick disk. The 102 stars have -1≲[Fe/H]≲+0.4 and are all in the solar neighbourhood. Based on their kinematics they have been divided into a thin disk sample and a thick disk sample consisting of 60 and 38 stars, respectively. The remaining 4 stars have kinematics that make them kinematically intermediate to the two disks. Their chemical abundances also place them in between the two disks. Which of the two disk populations these 4 stars belong to, or if they form a distinct population of their own, can at the moment not be settled. The 66 stars from our previous studies were observed with the FEROS spectrograph on the ESO 1.5-m telescope and the CES spectrograph on the ESO 3.6-m telescope. Of the 36 new stars presented here 30 were observed with the SOFIN spectrograph on the Nordic Optical Telescope on La Palma, 3 with the UVES spectrograph on VLT/UT2, and 3 with the FEROS spectrograph on the ESO 1.5-m telescope. All spectra have high signal-to-noise ratios (typically S/N>250) and high resolution (R∼80000, 45000, and 110000 for the SOFIN, FEROS, and UVES spectra, respectively).

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: abundances - Galaxy: disk - Galaxy: formation - Galaxy: abundances - Galaxy: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/433/185): table4.dat table8.dat table9.dat>

Simbad objects: 113

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Number of rows : 113
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 400 PM* 00 08 40.9385785968 +36 37 37.652234016       5.9   F8IV 158 0
2 * 6 Cet PM* 00 11 15.8580395472 -15 28 04.720468404 5.35 5.38 4.89     F8VFe-0.8CH-0.5 298 0
3 HD 2454 PM* 00 28 20.0424818616 +10 11 23.297664120   6.47   5.8   F5VSr 170 0
4 * 14 Cet PM* 00 35 32.8334053776 -00 30 20.198722752   6.368 5.936     F5V 126 0
5 HD 3628 PM* 00 39 13.2642083565 +03 08 02.129163830   7.969 7.339 6.9   G3V 119 0
6 G 267-153 PM* 00 39 57.8234302713 -33 57 41.218831187   7.18 6.69     F7V 73 0
7 HD 3823 PM* 00 40 25.6698671445 -59 27 16.566549816   6.44 5.90     G0VFe-0.9CH-0.4 160 0
8 HD 3795 PM* 00 40 32.7939851012 -23 48 17.728718238   6.84 6.14     K0VFe-1.5CH-1.3 197 0
9 HD 4308 PM* 00 44 39.2672095011 -65 38 58.277728125 7.31 7.193 6.552     G6VFe-0.9 231 1
10 HD 4295 PM* 00 46 38.5057428888 +69 19 31.472585472 6.760 6.800   6.2   F3V 37 0
11 HD 4597 PM* 00 47 30.7543402959 -36 56 24.700840935   8.39 7.85     F7/8V 79 1
12 * phi02 Cet PM* 00 50 07.5889624710 -10 38 39.583852438   5.69 5.19     F7V 256 0
13 HD 6225 PM* 01 03 57.4419003456 +48 51 40.810212396   7.60 7.17     F8 28 0
14 HD 6301 PM* 01 04 27.6244798752 +29 39 31.631943600   6.634 6.202     F7IV-V 58 0
15 * 29 Cet PM* 01 07 59.6638945208 +01 59 34.981418276   7.31   5.9   G8IV/V 149 0
16 * nu. Phe PM* 01 15 11.1214282378 -45 31 53.992580679 5.65 5.54 4.96 4.47 4.11 F9VFe+0.4 244 0
17 HD 8634 SB* 01 25 35.6770156104 +23 30 41.460068844   6.625 6.187 14.22   F6V 90 0
18 * rho Psc V* 01 26 15.2623962744 +19 10 20.450614692   5.718 5.344     F2V 110 0
19 HD 9562 PM* 01 33 42.8357181696 -07 01 31.238801760 6.61 6.40 5.76     G1V 250 0
20 HD 12042 PM* 01 56 59.9847437632 -51 45 58.485059294   6.58 6.10     F8.5Fe-0.7 92 0
21 * eta Ari PM* 02 12 48.0856782200 +21 12 39.577562642       5.0   F5V 180 0
22 HD 14412 PM* 02 18 58.5047816166 -25 56 44.473793228   7.07 6.34     G8V 211 0
23 HD 15029 PM* 02 25 33.9382462871 +11 58 16.420734131       7.1   F5 47 0
24 * lam02 For PM* 02 36 58.6077493776 -34 34 40.711246464 6.67 6.45 5.79     G1V 194 1
25 HD 16397 PM* 02 38 27.8623940856 +30 48 59.857575511 7.98 7.96 7.37 6.84 6.49 G0V 148 0
26 HD 17006 PM* 02 42 08.4437861136 -46 31 27.989231952   6.985 6.094     K1III 51 0
27 * iot Hor PM* 02 42 33.4666679022 -50 48 01.055138166   5.97 5.40     F8V 365 1
28 * eps For PM* 03 01 37.6288785045 -28 05 29.373792325   6.68 5.85     G9:V 176 0
29 * 94 Cet PM* 03 12 46.4365677072 -01 11 45.955808988   5.631 5.070     F8.5V 425 1
30 HD 20407 PM* 03 15 06.3902054760 -45 39 53.360466948 7.326 7.334 6.756 6.426 6.103 G5VFe-1.2CH-1 108 0
31 * e Eri PM* 03 19 55.6509122226 -43 04 11.215188426 5.20 4.98 4.27 3.65 3.25 G6V 416 1
32 HD 22309 PM* 03 36 03.1577672433 +16 28 02.892083262 8.250 8.230   7.3   G0 62 0
33 HD 22879 Pe* 03 40 22.0652879951 -03 13 01.124265616 7.146 7.222 6.667 6.346 6.016 G0VmF2 467 0
34 * del Eri * 03 43 14.9005379551 -09 45 48.210955899 5.13 4.46 3.54 2.82 2.32 K0+IV 573 0
35 HD 23626 SB* 03 47 49.0193230176 +32 11 43.491193404   6.718 6.252     G0 42 0
36 HD 24616 PM* 03 53 59.4642188174 -23 08 13.471094216   7.52 6.71     G8IV/V 101 0
37 HD 25322 PM* 04 02 15.2907638976 +22 25 20.185886064   8.27 7.82     F5V 34 0
38 HD 25457 TT* 04 02 36.7442719512 -00 16 08.119921152   5.88 5.38     F7V 253 0
39 HD 27485 PM* 04 20 14.5709081075 -03 45 04.855925430   8.51 7.86     G3V 56 0
40 HD 29587 SB* 04 41 36.3155555021 +42 07 06.424075363 7.940 7.890 7.280 6.74 6.39 G2V 147 1
41 * 58 Eri BY* 04 47 36.2917029384 -16 56 04.040472552   6.14 5.50     G2.5IV-V 400 0
42 * 59 Eri * 04 48 32.5336286112 -16 19 46.151304420   6.278 5.755     F8V 76 0
43 HD 32820 PM* 05 03 53.9523575328 -41 44 41.825936796   6.824 6.303     F8V 68 0
44 * 68 Eri PM* 05 08 43.6987121400 -04 27 22.349830176   5.546 5.119     F5.5VkF4mF2 217 0
45 HD 33167 PM* 05 10 42.9204964200 +46 57 43.456807404       5.4   F5V 78 0
46 * zet Pic PM* 05 19 22.1350114344 -50 36 21.481796808   5.96 5.45     F6IV 84 0
47 HD 37739 PM* 05 41 46.7491148040 +22 52 13.288954368       7.7   F5 40 0
48 * alf Men PM* 06 10 14.4725823672 -74 45 10.958331816   5.798 5.069     G7V 260 0
49 HD 45701 PM* 06 24 26.6002796856 -63 25 44.439432744   7.12 6.46     G1V 106 0
50 HD 45184 PM* 06 24 43.8795895848 -28 46 48.415725948   7.01 6.39 6.24 8.94 G2Va 180 1
51 HD 60298 PM* 07 34 50.4100620506 +24 57 16.098863967 8.14 8.04   7.0   G0 73 0
52 HD 62301 PM* 07 44 56.1929632534 +39 33 22.915760845 7.220 7.270   6.4   F8V 127 0
53 HD 69611 PM* 08 17 29.3481646355 -03 59 22.623439715   8.32 7.74     G0V 129 0
54 HD 76932 PM* 08 58 43.9327642391 -16 07 57.817644364 6.47 6.39 5.86     G2VFe-1.8CH-1 380 0
55 HD 77408 PM* 09 03 15.7430487906 +32 52 53.167659330   7.53   6.8   F6IV 71 0
56 HD 78558 PM* 09 08 25.2377034007 -15 08 41.234523192   7.91 7.34     G0.5V 139 0
57 HD 80654 PM* 09 21 18.5167575192 +13 06 41.232330180 7.170 7.140 6.670     F8V 35 0
58 HD 130551 PM* 14 51 31.7225624616 -60 55 50.851034904   9.068 8.751     F5V 97 0
59 * nu.02 Lup PM* 15 21 48.1499105161 -48 19 03.469906910 6.35 6.30 5.65     G3/5V 260 1
60 HD 144585 PM* 16 07 03.3696573456 -14 04 16.671141984 7.22 6.98 6.32     G2V 174 0
61 HD 145148 PM* 16 09 11.2150771435 +06 22 43.289900623   6.97   5.3   K1.5IV 168 0
62 HD 147513 PM* 16 24 01.2911377368 -39 11 34.729913940 6.17 6.02 5.376     G5V 326 1
63 * zet TrA SB* 16 28 28.1422653048 -70 05 03.824909916   5.446 4.899     F9V 191 0
64 HD 149612 PM* 16 39 04.1417975517 -58 15 29.528870106 7.674 7.644 7.034 6.679 6.334 G5VFe-1.2CH-0.9 76 0
65 HD 152391 PM* 16 52 58.8025159848 -00 01 35.118396116   7.40 6.64     G8.5Vk: 351 0
66 HD 153075 PM* 17 00 31.6444229092 -57 17 49.574473934   9.415 8.910     G2VFe-0.8CH-0.5 94 0
67 V* V2213 Oph BY* 17 05 16.8186610814 +00 42 09.221511649   6.59   5.6   F8.5IV-V 328 0
68 HD 156098 PM* 17 17 03.6458542704 -32 39 46.220745528   6.021 5.526     F6V 107 0
69 HD 156365 PM* 17 18 07.1354998272 -24 04 22.881440568   7.27 6.59     G3V 81 0
70 HD 157089 PM* 17 21 07.0564477831 +01 26 34.983929347 7.60 7.59 7.01 6.46 6.14 F8VgF8mF6 240 0
71 HD 157466 PM* 17 22 27.6459785904 +24 52 45.935235804       6.6   F8V 118 0
72 HD 157347 PM* 17 22 51.2877087336 -02 23 17.439450684   6.965 6.278     G3V 179 0
73 * 84 Her PM* 17 43 21.5645208624 +24 19 40.156969404   6.394 5.729     G2IIIb 140 0
74 * mu. Ara PM* 17 44 08.7031414872 -51 50 02.591603160   5.85 5.15     G3IV-V 497 2
75 HD 162396 PM* 17 52 52.5830170920 -41 59 47.486766588   6.74 6.20     F9VFe-0.7CH-0.4 121 0
76 V* V972 Her EB* 17 58 05.0037414840 +32 38 53.017925424   7.09 6.65     F5 52 0
77 HD 165401 PM* 18 05 37.4541846601 +04 39 25.797083469 7.443 7.399 6.786 6.432 6.09 G2V 215 0
78 HD 166435 PM* 18 09 21.3816898440 +29 57 06.166145376   7.457 6.829     G1IV 178 0
79 HD 169830 * 18 27 49.4849984976 -29 49 00.700831380   6.406 5.902 7.01   F7V 264 1
80 HD 172051 ** 18 38 53.4010594968 -21 03 06.750986472   6.518 5.860     G6V 187 1
81 HD 174160 * 18 48 16.4026615104 +23 30 53.093814444 6.62 6.672 6.181     F7V 77 0
82 HD 176377 PM* 18 58 51.0029782656 +30 10 50.318900724   7.37   6.4   G1V 113 0
83 HD 179949 BY* 19 15 33.2300695008 -24 10 45.671448072   6.772 6.237     F8V 377 1
84 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 469 0
85 HD 183877 PM* 19 32 40.3321897451 -28 01 11.310045098   7.83 7.15     G8VFe-1CH-0.5 96 0
86 HD 184960 PM* 19 34 19.7892769104 +51 14 11.827409604   6.21   5.4   F7V 147 0
87 HD 184985 PM* 19 37 34.4135659464 -14 18 06.478148448   5.938 5.451     F7V 95 0
88 HD 190360 PM* 20 03 37.4050868074 +29 53 48.492435887   6.44   5.2   G7IV-V 414 1
89 HD 190009 * 20 03 44.3100162600 -22 35 44.150285868   6.928 6.428     F7V 68 0
90 * del Pav PM* 20 08 43.6088716052 -66 10 55.442769229 4.78 4.32 3.56 2.95 2.61 G8IV 371 0
91 HD 193307 PM* 20 21 41.0365243245 -49 59 57.900101995   6.82 6.28     F9V 121 0
92 HD 197214 SB* 20 43 15.9995439192 -29 25 26.058100692 7.778 7.635 6.960 6.583 6.229 G6V 83 0
93 HD 199288 PM* 20 57 40.0687221764 -44 07 45.733001992   7.11 6.52     G2VFe-1.0 182 0
94 * 11 Aqr PM* 21 00 33.8408325744 -04 43 48.934668864   6.819 6.192     G1V 197 0
95 * gam Pav PM* 21 26 26.6049826473 -65 21 58.313057521 4.57 4.70 4.22 3.75 3.45 F9VFe-1.4CH-0.7 394 0
96 * 15 Peg PM* 21 52 29.9168018496 +28 47 36.750679764 5.82 5.95 5.53     F2V 233 0
97 HD 208998 PM* 22 01 36.5232180120 -53 05 36.882266969   7.68 7.14     G0V 99 0
98 HD 210277 PM* 22 09 29.8657847411 -07 32 55.162082226   8.85 8.57 7.36   G8V 315 1
99 HD 210483 PM* 22 10 26.1624191757 +18 47 49.580722188   8.16   7.2   G4 70 0
100 HD 210737 SB* 22 12 46.6755665376 -20 53 25.799554392   8.01 7.54     F5/6V 34 0
101 HD 210918 PM* 22 14 38.6528791223 -41 22 53.994495360 7.02 6.88 6.23     G2V 188 0
102 HD 211976 * 22 20 55.7972067264 +08 11 12.271519068   6.621 6.163     F5V 94 0
103 HD 212231 PM* 22 23 14.4741477417 -25 50 32.224203160   8.47 7.86     G2V 71 0
104 HD 215110 PM* 22 42 57.9562255296 +00 24 06.760066428   8.60   7.2   G8IV 39 0
105 * rho Ind PM* 22 54 39.4819393536 -70 04 25.352060772 6.95 6.71 6.05     G1VFe+0.3 179 1
106 HD 216756 PM* 22 55 02.6473045344 +37 04 36.582079476   6.295 5.901     F4V 91 0
107 * 51 Peg PM* 22 57 27.9804852576 +20 46 07.797040104 6.39 6.16 5.46 4.97 4.61 G2IV 1115 1
108 HD 217107 ** 22 58 15.5408995872 -02 23 43.383234768   6.919 6.163     G8IV/V 347 1
109 HD 221830 PM* 23 35 28.8941578040 +31 01 01.830647333   7.45   6.5   G2 154 0
110 V* KT Peg RS* 23 39 30.9712062189 +28 14 47.415889813   7.71   6.6   G8 92 0
111 HD 224022 PM* 23 54 38.6211470319 -40 18 00.221877716   6.60 6.03     G0V 86 0
112 HD 224233 PM* 23 56 11.4341451556 +59 46 03.389049933   8.30   7.2   G1 55 0
113 HD 224383 PM* 23 57 33.5181718097 -09 38 51.070746906   8.51 7.88     G3V 109 0

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2022.05.27-08:55:55

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