2007A&A...467..283L

Query : 2007A&A...467..283L

2007A&A...467..283L - Astronomy and Astrophysics, volume 467283-294 (2007/5-3)

Detailed chemical composition of Galactic Cepheids. A determination of the Galactic abundance gradient in the 8-12 kpc region.

LEMASLE B., FRANCOIS P., BONO G., MOTTINI M., PRIMAS F. and ROMANIELLO M.

Abstract (from CDS):

The recent introduction of high-resolution/large spectral-range spectrographs has provided the opportunity to investigate the chemical composition of classical Cepheids in detail. This paper focusses on new abundance determinations for iron and 6 light metals (O, Na, Mg, Al, Si, Ca) in 30 Galactic Cepheids. We also give a new estimate of the Galactic radial abundance gradient. The stellar effective temperatures were determined using the method of line depth ratios, and the surface gravity and the microturbulent velocity vt by imposing the ionization balance between Fe I and Fe II with the help of curves of growth. Abundances were calculated with classical LTE atmosphere models. Abundances were obtained with rms accuracies of about 0.05-0.10dex for Fe, and 0.05-0.20dex for the other elements. Cepheids in our sample have solar-like abundances, and current measurements agree quite well with previous determinations. We computed ``single zone'' Galactic radial abundance gradients for the 8-12kpc region and found a slope for iron of -0.061dex/kpc.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - stars: supergiants - Galaxy: abundances - Galaxy: evolution

Simbad objects: 99

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Number of rows : 99
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* SU Cas cC* 02 51 58.7511911208 +68 53 18.606894036 6.92 6.44 5.80     F5.5III+ 444 1
2 V* SZ Tau cC* 04 37 14.7776556504 +18 32 34.926940860 7.65 7.13 6.37     F6.7:Ib 316 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 * bet Dor cC* 05 33 37.5159729864 -62 29 23.376457680 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 401 0
5 V* ST Tau cC* 05 45 03.1603367712 +13 34 34.903715808   9.13 7.79   7.149 G0 145 0
6 V* EU Tau cC* 05 45 40.5288555072 +18 39 24.819950988   8.71 8.08     G5 126 0
7 V* RZ Gem cC* 06 02 36.5871685272 +22 14 02.948725104   10.83 9.91 9.68 8.679 F5 129 0
8 V* GQ Ori cC* 06 11 13.5830023776 +09 36 44.985287232   9.81 8.88   7.869 B 94 1
9 V* SV Mon cC* 06 21 26.3049089544 +06 28 12.578441700   9.32 8.28     G1Ib 187 0
10 V* T Mon cC* 06 25 12.9996760920 +07 05 08.558582892 8.24 7.20 5.98   4.996 G3Iabv+A0p 487 1
11 * 48 Aur cC* 06 28 34.0881845487 +30 29 34.929596860 6.73 6.23 5.55   4.777 F5.5-G0Ib 399 0
12 V* W Gem cC* 06 34 57.4524971712 +15 19 49.696329540 7.79 7.25 6.54   5.908 F5-G1 230 0
13 V* CV Mon cC* 06 37 04.8449178072 +03 03 50.274557532   11.32 9.90   8.631 ~ 254 0
14 V* AD Gem cC* 06 43 07.5117403056 +20 56 20.799066228   10.42 9.80   9.044 F5 115 0
15 * zet Gem cC* 07 04 06.5312384690 +20 34 13.074474962 5.20 4.58 3.79   3.082 G1Ib 596 0
16 V* RY CMa cC* 07 16 37.6357128312 -11 29 14.299158552   8.99 8.19   7.133 F8Ib/II 173 0
17 V* RZ CMa cC* 07 21 32.8571936928 -16 41 13.998801084   10.75 9.72   8.477 F6 106 0
18 V* TW CMa cC* 07 22 02.3794130112 -14 19 05.498697540   10.40 9.59   8.429 F5 114 0
19 V* VX Pup cC* 07 32 36.6489773592 -21 55 49.534161528   9.87 9.32 8.97   F3IV 147 0
20 V* X Pup cC* 07 32 47.0329137816 -20 54 34.884361152   9.56 8.46   7.143 K0 196 0
21 * y03 Pup cC* 07 38 18.2084341776 -48 36 05.164557768   6.314 5.658 6.94   F7Ib/II 133 0
22 V* VZ Pup cC* 07 38 35.2380326136 -28 29 58.597431036   11.469 10.154 9.583   F7.5 165 1
23 V* WX Pup cC* 07 41 59.0037418728 -25 52 34.252471632   9.99 9.09   7.944 G0 130 0
24 V* AD Pup cC* 07 48 03.8512427256 -25 34 40.024315488   10.81 9.99     F8 125 0
25 V* AP Pup cC* 07 57 45.6725424768 -40 07 24.082195800   8.13 7.37   6.462 F8II 139 0
26 V* AQ Pup cC* 07 58 22.0887499032 -29 07 48.338631084   9.70 8.54   7.175 F5-G2Ib 212 0
27 V* LS Pup cC* 07 58 59.2197041640 -29 18 28.358867700   11.75 10.59 9.88 8.933 ~ 107 0
28 V* BN Pup cC* 08 06 21.4750343856 -30 05 48.770958372   10.99 9.75 8.97 8.981 G4 140 0
29 V* AX Vel cC* 08 10 49.3236457224 -47 41 54.828934332   8.78 8.16     F6II 127 0
30 V* AH Vel cC* 08 11 59.9667243312 -46 38 39.658236936   6.35 5.76     F7Ib/II 186 0
31 V* AT Pup cC* 08 12 22.4030911320 -36 56 37.533017184   8.83 8.07   7.085 F5 140 0
32 V* RS Pup cC* 08 13 04.2157111224 -34 34 42.696447852 8.89 8.51 7.04   5.453 F8Iab 365 0
33 V* V Car cC* 08 28 43.6940477208 -60 07 21.268842960   8.14 7.31   6.432 F8Ib/II 157 0
34 V* RZ Vel cC* 08 37 01.3028699904 -44 06 52.846248456   8.507 7.260     G1Ib 240 0
35 V* T Vel cC* 08 37 40.8266515248 -47 21 43.084440432   8.92 7.68   6.970 G0II 182 0
36 V* SW Vel cC* 08 43 38.6903528472 -47 24 11.200999464   9.58 8.32     F8/G0Ib 198 0
37 V* SX Vel cC* 08 44 53.4685905720 -46 20 34.736412696   9.19 8.33   7.264 F8II 147 0
38 V* ST Vel cC* 08 44 55.8931278528 -50 33 36.141820956   10.89 9.69   8.294 K 90 0
39 V* V Vel cC* 09 22 16.1680205928 -55 57 37.153892448   8.29 7.57   6.695 F8II 148 0
40 V* DR Vel cC* 09 31 40.9749230568 -49 39 18.022694328   10.50 9.25     ~ 103 0
41 V* V397 Car cC* 10 00 03.6928372248 -66 16 34.477656528   9.07 8.29     F8Ib/II 58 0
42 V* RY Vel cC* 10 20 41.0315888064 -55 19 17.028180084   9.71 7.86   6.840 F5Ib/II 163 0
43 V* AQ Car cC* 10 21 22.9751846448 -61 04 26.737119948   9.73 8.84     F8/G0Ib 129 0
44 V* UX Car cC* 10 29 11.2428781344 -57 36 48.246072156 9.81 9.36 8.62   7.559 F2II 146 0
45 V* VY Car cC* 10 44 32.6909254176 -57 33 55.327074480 8.12 7.70 6.87   6.299 F7Iab/b 231 0
46 V* WZ Car cC* 10 55 18.7271183664 -60 56 23.951331672   10.40 9.37     F8 164 0
47 V* U Car cC* 10 57 48.1866744768 -59 43 55.883482140 8.31 7.21 6.11   5.073 G5/8Iab 247 0
48 V* UU Mus cC* 11 52 17.7227171832 -65 24 15.063278652   10.5 9.54     F7/G0p 146 0
49 V* S Mus cC* 12 12 47.0199008472 -70 09 06.439196664 7.58 8.80 8.33 7.39 5.196 F6Ib+B5V 275 0
50 * 35 Cru cC* 12 31 40.3303562544 -59 25 26.124690324 6.60 6.19 5.53     F7Ib/II 157 0
51 V* VW Cen cC* 13 33 59.0300715216 -64 03 19.999348524   11.60 10.36   8.785 ~ 137 0
52 V* KN Cen cC* 13 36 36.8950655064 -64 33 29.914949592   11.22 9.86     G8Iab+B6.0V 157 0
53 V* XX Cen cC* 13 40 18.6439597656 -57 36 47.440376532   8.72 7.30   6.747 F7/8II 205 0
54 V* V Cen cC* 14 32 33.0833481288 -56 53 15.774129600 8.44 7.84 6.93   5.798 F5Ib/II 288 0
55 V* GH Lup cC* 15 24 38.3402056752 -52 51 13.897364040 10.03 9.05 7.83     G2Iab 110 0
56 V* U Nor cC* 15 42 20.9185773096 -55 18 42.939346104   10.68 9.22     F8Ib/II 160 0
57 V* V340 Nor cC* 16 13 17.3997630552 -54 14 05.586545400   9.61 8.47 8.83   G2Iab 175 1
58 V* S Nor cC* 16 18 51.8316855000 -57 53 59.256000852 8.15 7.49 6.49   5.427 F8/G0Ib 396 1
59 V* V340 Ara cC* 16 45 19.1125726896 -51 20 33.393735924   11.39 10.03     ~ 97 0
60 V* KQ Sco cC* 16 51 38.5473559392 -45 25 36.101286516 12.37 10.69 9.31     K7 149 0
61 V* RV Sco cC* 16 58 19.7480002088 -33 36 32.767208444 7.79 7.37 6.61   5.909 G0Ib 212 0
62 V* BF Oph cC* 17 06 05.4979834752 -26 34 50.029842576 8.00 7.61 6.93   6.377 G0II 234 0
63 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
64 V* V500 Sco cC* 17 48 37.5008772936 -30 28 33.459985200   10.07 8.81   7.191 K0 133 0
65 V* RY Sco cC* 17 50 52.3447976064 -33 42 20.412288432 9.77 8.79 7.51   6.256 F6Ib 203 0
66 V* Y Oph cC* 17 52 38.7019050072 -06 08 36.874071816 8.62 7.61 6.21     G3Ia 376 0
67 V* AU Sgr EB* 18 04 27.7154254224 -22 59 57.816544020           ~ 6 0
68 * gam01 Sgr cC* 18 05 01.2264355704 -29 34 48.322222356 5.99 5.47 4.69   3.869 G0Ib/II 366 0
69 V* VY Sgr cC* 18 12 04.5659242512 -20 42 14.462412336   12.70 11.36     F6 87 0
70 * 12 Sgr cC* 18 13 02.4957687048 -23 07 02.201380968 8.06 7.48 6.59   6.057 F7/8Ib/II 201 0
71 V* WZ Sgr cC* 18 16 59.7160721616 -19 04 32.989734840   9.10 7.45     F7(III) 270 0
72 V* Y Sgr cC* 18 21 22.9862401944 -18 51 36.006450458 7.31 6.69 5.75   4.810 F8II 303 0
73 V* UZ Sct cC* 18 31 22.3668789696 -12 55 43.335648156   13.23 10.91   9.195 G0 99 0
74 V* U Sgr cC* 18 31 53.3323107600 -19 07 30.261459540 8.50 7.81 6.68   5.413 G1Ib 491 0
75 V* V367 Sct cC* 18 33 35.2353033192 -10 25 38.126250552   13.34 11.580     F7Ib 187 0
76 V* BQ Ser cC* 18 36 15.9375844368 +04 23 53.693400840   10.49 9.21     F5III 114 0
77 V* EW Sct cC* 18 37 51.1112159832 -06 47 48.494842332   9.50 7.96     F8Ib/II 117 0
78 V* SS Sct cC* 18 43 43.5111680040 -07 43 51.957172704   9.29 7.90   7.100 F8II 189 0
79 V* V350 Sgr cC* 18 45 17.4968424336 -20 38 50.552766852   8.321 7.450 8.41 6.421 F8Ib/II 231 0
80 V* BB Sgr cC* 18 50 59.8729954248 -20 17 42.829838520 8.07 7.53 6.69   5.824 G0Ib 269 0
81 V* SZ Aql cC* 19 04 39.4158230832 +01 18 22.158826524   9.92 7.92   7.039 F8/G0Ib 204 0
82 V* TT Aql cC* 19 08 13.7497129848 +01 17 55.147982640 8.96 7.86 6.50   5.699 G0/2Ib 293 0
83 V* V496 Aql cC* 19 08 20.7707435688 -07 26 15.879957540   8.88 7.79     F8/G0Iab/b 192 0
84 V* FM Aql cC* 19 09 15.9900952128 +10 33 08.961371208 9.76 9.05 7.89   6.725 F2I 198 0
85 V* FN Aql cC* 19 12 47.3148920688 +03 33 26.703677448   9.58 7.96     F8/G0Iab/b 197 0
86 V* U Vul cC* 19 36 37.7293294920 +20 19 58.576725768   8.368 7.162   5.556 F8Iab 244 0
87 V* S Vul cC* 19 48 23.8063718736 +27 17 11.428754460   11.392 9.551 8.775   K0 211 0
88 V* SV Vul cC* 19 51 30.9059845128 +27 27 36.837672012 8.65 9.00 6.74   5.703 F8Ia 460 0
89 V* V1162 Aql cC* 19 52 20.9909317368 -11 22 00.754130100   8.73 7.81     G2Ib 101 0
90 * eta Aql cC* 19 52 28.3689223781 +01 00 20.371980515 5.12 4.61 3.80   3.030 F6Iab+B9.8V 701 0
91 * 10 Sge cC* 19 56 01.2628947456 +16 38 05.262056412 6.45 6.03 5.36 6.81 4.789 F7Ib 369 0
92 V* X Cyg cC* 20 43 24.1917118680 +35 35 16.077149700 8.69 7.70 6.47   5.241 F7Ib 496 0
93 V* T Vul cC* 20 51 28.2383768376 +28 15 01.819622952 6.89 6.49 5.77   5.061 F5Ib+A0.8V 357 0
94 V* VZ Cyg cC* 21 51 41.4416202624 +43 08 02.542086024   10.02 8.60   7.948 G0 183 0
95 V* BG Lac cC* 22 00 25.1466021504 +43 26 43.331629776   9.33 8.59   7.793 G0.7 163 0
96 V* Y Lac cC* 22 09 02.9002579560 +51 02 45.084186096   9.79 9.13   8.292 F8 185 0
97 * del Cep cC* 22 29 10.2626640314 +58 24 54.697613650 4.71 4.35 3.75   3.219 F5Iab:+B7-8 763 0
98 V* Z Lac cC* 22 40 52.1457028632 +56 49 46.083774432   9.71 8.57   7.164 F6Ib 245 0
99 V* X Lac cC* 22 49 03.1807630560 +56 25 41.530963044   9.21 8.42     G5 180 0

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