2010MNRAS.408.1225P

Query : 2010MNRAS.408.1225P

2010MNRAS.408.1225P - Mon. Not. R. Astron. Soc., 408, 1225-1232 (2010/October-3)

High-resolution spectroscopic study of red clump stars in the Galaxy: iron-group elements.

PUZERAS E., TAUTVAISIENE G., COHEN J.G., GRAY D.F., ADELMAN S.J., ILYIN I. and CHORNIY Y.

Abstract (from CDS):

The main atmospheric parameters and abundances of the iron-group elements (vanadium, chromium, iron, cobalt and nickel) are determined for 62 red giant `clump' stars revealed in the Galactic field by the Hipparcos orbiting observatory. The stars form a homogeneous sample with the mean value of temperature Teff= 4750±160K, of surface gravity log g = 2.41±0.26 and the mean value of metallicity [Fe/H] = -0.04±0.15dex. A Gaussian fit to the [Fe/H] distribution produces the mean <[Fe/H]> = -0.01 and dispersion σ[Fe/H]= 0.08. The near-solar metallicity and small dispersion of σ[Fe/H] of clump stars of the Galaxy obtained in this paper confirm the theoretical model of the Hipparcos clump by Girardi & Salaris. This suggests that nearby clump stars are (in the mean) relatively young objects, reflecting mainly the near-solar metallicities developed in the local disc during the last few Gyr of its history. We find iron-group element to iron-abundance ratios in clump giants to be close to solar.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): stars: abundances - stars: atmospheres - stars: horizontal branch

Simbad objects: 62

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Number of rows : 62
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 * 52 Psc PM* 00 32 35.4848082672 +20 17 39.543706680   6.443 5.370     K0III 66 0
2 * eps And PM* 00 38 33.3474310042 +29 18 42.311618884 5.72 5.25 4.38 3.70 3.19 G7IIIFe-3CH1 286 0
3 * del And SB* 00 39 19.6031132231 +30 51 39.540873571 6.04 4.56 3.28 2.36 1.70 K3III-IIIbCN0.5 340 0
4 * phi01 Cet PM* 00 44 11.4000904231 -10 36 34.382643011   5.773 4.767     K0III 123 0
5 * 21 Cet PM* 00 54 17.5927919832 -08 44 26.390035212   7.086 6.161     G8III 90 0
6 * ups02 Cas Pe* 00 56 39.9051464088 +59 10 51.805287084   5.581 4.622     G8.5IIIbFe-0.5 233 0
7 * phi04 Cet HB* 00 58 43.8680525208 -11 22 47.910692424   6.566 5.614     G8III 81 0
8 * eta Cet HB* 01 08 35.3913324413 -10 10 56.151936084 5.80 4.61 3.45 2.61 2.03 K2-IIIb 239 0
9 * 32 Cet * 01 10 11.9457318744 -08 54 22.084762140   7.420 6.394     K0III 43 0
10 * tau Psc PM* 01 11 39.6171666936 +30 05 22.696564992   5.605 4.511     K0.5IIIb 150 0
11 * ksi And * 01 22 20.4200755704 +45 31 43.596248844   5.951 4.868     K0-IIIb 142 0
12 * tet Cet HB* 01 24 01.4032816333 -08 10 59.739230440 5.57 4.65 3.59 2.83 2.26 K0IIIb 206 0
13 * 94 Psc PM* 01 26 41.6791537272 +19 14 25.526087052   6.616 5.495     K1III 98 0
14 HD 8949 PM* 01 28 22.9157619816 +07 57 40.878936036   7.341 6.214     K1III 74 0
15 * chi Cas * 01 33 55.8814773504 +59 13 55.394091516   5.675 4.681     G9IIIb 133 0
16 HD 11037 * 01 48 26.0194155048 +03 41 07.618785792   6.894 5.904     K0III 53 0
17 * ksi Psc SB* 01 53 33.3369902664 +03 11 15.117021888   5.552 4.604     G8.5IIIb 124 0
18 HD 12583 RG* 02 02 58.5696126264 -15 18 21.348597708   6.833 5.864     K0II/III 64 0
19 * 75 Cet HB* 02 32 09.4224095904 -01 02 05.616571164   6.366 5.358 10.0   K1III 95 1
20 * 81 Cet PM* 02 37 41.8020809760 -03 23 46.225928328   6.674 5.647     K0III 97 1
21 * 39 Ari PM* 02 47 54.5420751618 +29 14 49.625779256 6.710 5.630 4.510 3.72 3.14 K0.5IIIb 184 0
22 * eta Eri PM* 02 56 25.6492431840 -08 53 53.316500640 5.97 4.99 3.87 3.08 2.50 K1+IIIb 203 0
23 * kap Per PM* 03 09 29.8036400506 +44 51 26.849828627 5.62 4.79 3.81 3.07 2.57 G9.5IIIb 246 0
24 * del Ari PM* 03 11 37.7665678572 +19 43 36.023197055 6.26 5.40 4.37 3.60 3.09 G9.5IIIb 207 0
25 * 37 Tau PM* 04 04 41.7128811713 +22 04 54.946823724 6.41 5.44 4.37 3.58 3.05 K0III-IIIb 194 0
26 * 75 Tau ** 04 28 26.3699079120 +16 21 34.829804916   6.104 4.969     K1IIIb 116 0
27 * l Eri ** 04 38 10.8236170649 -14 18 14.500428166 5.99 4.96 3.87 3.03 2.47 K2-IIIb 141 0
28 * n Tau PM* 05 19 16.6061769240 +22 05 47.421418380   5.894 4.948     G8III 123 0
29 * e Ori * 05 23 56.8277860189 -07 48 29.025349522 5.78 5.08 4.12 3.40 2.90 G8+III 157 0
30 * 20 Mon PM* 07 10 13.6815026472 -04 14 13.585055244 6.73 5.95 4.92 4.13 3.61 K0III 162 0
31 * iot Gem ** 07 25 43.5956409143 +27 47 53.086950407 5.67 4.83 3.79 3.02 2.52 G9IIIb 222 0
32 * alf Mon PM* 07 41 14.8319734511 -09 33 04.077766984 5.83 4.95 3.93 3.16 2.64 G9.5III-IIIbFe-0.5 214 0
33 * del Cnc ** 08 44 41.0991810454 +18 09 15.509048595 6.01 5.02 3.94 3.16 2.62 K0+IIIb 212 0
34 HD 82741 * 09 35 03.8297521152 +39 37 17.373515520   5.788 4.800     G9.5IIIbFe-1 110 0
35 HD 86513 PM* 09 59 36.2143578360 +29 38 42.833290272   6.801 5.744     G9III: 46 0
36 * 46 LMi PM* 10 53 18.6891667765 +34 12 53.611679098 5.79 4.87 3.83 3.00 2.46 K0+III-IV 244 0
37 * alf Crt PM* 10 59 46.4651557828 -18 17 55.630394216 6.14 5.16 4.07 3.27 2.72 K0IIIb 224 0
38 * 86 Leo PM* 11 30 29.0276281392 +18 24 35.305344936   6.621 5.549     K0III 77 0
39 * omi Vir SB* 12 05 12.5318326945 +08 43 58.866875781 5.75 5.11 4.12 3.38 2.89 G8IIICN0.5CH1Ba1 301 0
40 * gam Com PM* 12 26 56.2725043899 +28 16 06.318485124 6.64 5.47 4.34 3.53 3.01 K1IIIFe0.5 216 0
41 HD 131111 PM* 14 50 29.6463422376 +37 16 19.371107424   6.50   4.8   K0III-IV 107 0
42 * 110 Vir PM* 15 02 54.0375635908 +02 05 28.695699730 6.31 5.44 4.40 3.59 3.05 K0+IIIbFe-0.5 133 0
43 * ome Ser PM* 15 50 17.5468226304 +02 11 47.432004216   6.236 5.217     K0IV 146 1
44 * 16 Her PM* 16 15 28.6349735016 +18 48 29.117594304 7.82 6.81 5.69     K3III 67 0
45 * kap Oph LP? 16 57 40.0975028128 +09 22 30.104472450 5.52 4.36 3.20 2.36 1.82 K2III 314 0
46 * bet Oph PM* 17 43 28.3519097803 +04 34 02.293206489 5.150 3.930 2.750 1.96 1.38 K2IIICN0.5 490 0
47 * ksi Dra PM* 17 53 31.7295427958 +56 52 21.510944948 6.14 4.93 3.75 2.92 2.33 K2III 285 0
48 * 109 Her ** 18 23 41.8897062084 +21 46 11.109609046 6.18 5.02 3.84 2.99 2.39 K2IIIab 187 0
49 HD 172169 PM* 18 37 28.7705888352 +29 35 05.506335708   8.024 6.698     K4III 23 0
50 * kap Cyg PM* 19 17 06.1683228165 +53 22 06.449800127 5.47 4.73 3.76 3.13 2.66 G9III 215 0
51 * ksi Aql ** 19 54 14.8815179040 +08 27 41.235438096   5.759 4.707     G9.5IIIb 157 1
52 * eta Cyg * 19 56 18.3718373206 +35 05 00.322387793 5.800 4.910 3.880 3.19 2.66 K0III 289 0
53 * eps Cyg ** 20 46 12.6722768426 +33 58 13.182037125 4.370 3.520 2.480 1.73 1.19 K0III 519 0
54 * 34 Vul PM* 21 21 04.3938814104 +23 51 21.486740544   6.62   4.9   K0III 131 0
55 HD 207134 PM* 21 46 23.9495076720 +25 33 48.621084480       5.5   K2III 54 0
56 * 35 Peg PM* 22 27 51.5231162634 +04 41 44.404460456 6.74 5.86 4.80 4.02 3.46 K1-III-IV 276 0
57 * iot Cep PM* 22 49 40.8174918750 +66 12 01.458192633 5.50 4.60 3.54 2.69 2.19 K0-III 257 0
58 * mu. Peg PM* 22 50 00.1930748087 +24 36 05.692620534 5.10 4.42 3.48 2.80 2.33 G8+III 304 0
59 * 3 And PM* 23 04 10.9826882352 +50 03 07.525524888   5.71   4.0   K0IIIb 134 0
60 * omi Cep ** 23 18 37.49189 +68 06 41.1938           G8.5III-IIIbFe-0.5 135 0
61 * 70 Peg SB* 23 29 09.2992398120 +12 45 37.979571348 6.24 5.50 4.56 3.82 3.37 G8IIIa 159 0
62 * 78 Peg PM* 23 43 59.4852779160 +29 21 41.240147040   5.94 4.96 6.27   G8IIIb 96 0

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