2011A&A...532A..20F


Query : 2011A&A...532A..20F

2011A&A...532A..20F - Astronomy and Astrophysics, volume 532A, 20-20 (2011/8-1)

Modeling nearby FGK population I stars: a new form of estimating stellar parameters using an optimization approach.

FERNANDES J.M., VAZ A.I.F. and VICENTE L.N.

Abstract (from CDS):

Modeling a single star with theoretical stellar evolutionary tracks is a nontrivial problem because of a large number of unknowns compared to the number of observations. A current way of estimating stellar age and mass consists of using interpolations in grids of stellar models and/or isochrones, assuming ad hoc values for the mixing length parameter and the metal-to-helium enrichment, which is normally scaled to the solar values. We present a new method to model the FGK main-sequence of Population I stars. This method is capable of simultaneously estimating a set of stellar parameters, namely the mass, the age, the helium and metal abundances, the mixing length parameter, and the overshooting. The proposed method is based on the application of a global optimization algorithm (PSwarm) to solve an optimization problem that in turn consists of finding the values of the stellar parameters that lead to the best possible fit of the given observations. The evaluation of the fitting objective function requires the use of a stellar evolution simulation code, however. The methodology is tested using the Sun and five FGK fictitious stars, and is then adapted to 115 stars with a detailed spectroscopic analysis; half of these are planet-hosting stars. We present and discuss the stellar parameters estimated for each star in the context of previous works.

Abstract Copyright:

Journal keyword(s): methods: numerical - stars: fundamental parameters - Hertzsprung-Russell (HR) and C-M diagrams - planetary systems

Simbad objects: 69

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Number of rows : 69
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 HD 142 PM* 00 06 19.1753245111 -49 04 30.671249608   6.30 5.76     F7V 249 1
2 HD 1237 PM* 00 16 12.6780107483 -79 51 04.244506480 7.692 7.335 6.578     G8V 230 1
3 * zet Tuc PM* 00 20 04.2586334956 -64 52 29.257190108 4.82 4.80 4.23 3.73 3.40 F9.5V 379 0
4 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 589 0
5 * 54 Psc PM* 00 39 21.8053928046 +21 15 01.712899720 7.29 6.71 5.88 5.21 4.82 K0.5V 575 1
6 HD 4203 PM* 00 44 41.2002505536 +20 26 56.138079876       8.2   G6V 139 1
7 HD 5133 PM* 00 53 01.1348555154 -30 21 24.891057111 8.801 8.11 7.171 6.639 6.179 K2.5Vk: 168 0
8 * nu. Phe PM* 01 15 11.1214282378 -45 31 53.992580679 5.65 5.54 4.96 4.47 4.11 F9VFe+0.4 255 0
9 * ups And PM* 01 36 47.8415443907 +41 24 19.651368029 4.70 4.64 4.10 3.64 3.35 F9V 957 1
10 * p Eri A PM* 01 39 47.8126958280 -56 11 35.944312380   6.549 5.685 6.36   K2V 148 0
11 * q01 Eri PM* 01 42 29.3145176952 -53 44 26.991453264   6.05 5.52     F9V 319 1
12 * 109 Psc PM* 01 44 55.8255136824 +20 04 59.336892804   6.984 6.279     G3Va 279 2
13 HD 12661 PM* 02 04 34.2881404104 +25 24 51.513637932   8.16   7.0   K0V 256 1
14 HD 13445 PM* 02 10 25.9181700303 -50 49 25.465181208   6.945 6.117     K1.5V 450 1
15 * 79 Cet PM* 02 35 19.9291748518 -03 33 38.172943076   7.49 6.78     G2V 293 1
16 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 509 0
17 * alf For PM* 03 12 04.5298039833 -28 59 15.439152331 4.41 4.51 3.98 3.39 3.08 F6V 271 0
18 * 94 Cet PM* 03 12 46.4365677072 -01 11 45.955808988   5.631 5.070     F8.5V 448 1
19 HD 20367 PM* 03 17 40.0468295160 +31 07 37.360398072   6.962 6.399     F8V 129 1
20 * zet01 Ret PM* 03 17 46.1634549490 -62 34 31.152456644 6.24 6.18 5.54 5.00 4.66 G2.5VHdel1 294 0
21 * zet02 Ret ** 03 18 12.8188824117 -62 30 22.904711032   5.814 5.228     G1V 362 0
22 * e Eri PM* 03 19 55.6509122226 -43 04 11.215188426 5.20 4.98 4.27 3.65 3.25 G6V 444 1
23 HD 21175 PM* 03 23 35.2554696024 -40 04 34.964662908 8.302 7.758 6.903 6.439 5.986 K0V 74 0
24 HD 23356 PM* 03 43 55.3428341807 -19 06 39.233301647 8.711 8.012 7.081 6.555 6.098 K2V 140 0
25 HD 23484 PM* 03 44 09.1729719544 -38 16 54.372263223 8.449 7.875 6.996 6.516 6.09 K2V 122 0
26 HD 23596 PM* 03 48 00.3747144624 +40 31 50.293996068   7.85 7.24     F8 124 1
27 * omi02 Eri Er* 04 15 16.3196189945 -07 39 10.330779018 5.69 5.25 4.43 3.74 3.29 K0V 807 0
28 HD 28185 PM* 04 26 26.3227063776 -10 33 02.947149108   8.52 7.81     G6.5IV-V 185 1
29 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3018 0
30 HD 30177 PM* 04 41 54.3737734560 -58 01 14.727688572   9.18 8.37     G8V 137 1
31 * 58 Eri BY* 04 47 36.2917029384 -16 56 04.040472552   6.14 5.50     G2.5IV-V 419 0
32 HD 36435 PM* 05 27 39.3521452752 -60 24 57.586196016 8.068 7.75 6.983 6.573 6.191 G5V 116 0
33 * pi. Men PM* 05 37 09.8868446714 -80 28 08.834553264   6.25 5.67     G0V 320 1
34 HD 38858 PM* 05 48 34.9402551240 -04 05 40.721787744 6.71 6.61 5.97     G2V 300 1
35 HD 40307 PM* 05 54 04.2405000288 -60 01 24.493007640 8.814 8.097 7.147 6.597 6.119 K2.5V 254 1
36 HD 41004 * 05 59 49.6501762752 -48 14 22.888358520   9.49 8.62     K1IV 202 1
37 HD 40979 PM* 06 04 29.9431332528 +44 15 37.593981720       6.4   F8 159 1
38 HD 43162 LM* 06 13 45.2953762392 -23 51 42.971547996   7.068 6.366 5.94 5.61 G6.5V 169 0
39 HD 46375 PM* 06 33 12.6224391648 +05 27 46.528531452   8.70 7.84     G9V 233 2
40 HD 50554 PM* 06 54 42.8261485848 +24 14 44.005690212   7.41 6.84     F8V 193 1
41 HD 53143 PM* 06 59 59.6550515452 -61 20 10.252631566 8.035 7.609 6.803 6.375 5.99 G9V 158 0
42 HD 52265 PM* 07 00 18.0357115416 -05 22 01.780929120   6.845 6.282     G0V 326 1
43 HD 53705 PM* 07 03 57.3152216292 -43 36 28.925859669   5.94 5.28 5.05 4.71 G1.5V 193 0
44 HD 57095 ** 07 17 29.56192 -46 58 45.2751 8.362 7.646 6.669     K1V+K4V 77 0
45 HD 65216 PM* 07 53 41.3195697504 -63 38 50.353461420   8.65 7.96     G5V 140 1
46 HD 65486 PM* 07 58 04.3703179133 -25 37 35.863239731 10.366 9.497 8.439 7.818 7.28 K4-V(k) 85 0
47 HD 67199 PM* 08 02 31.1873092344 -66 01 15.382296660 8.656 8.049 7.166 6.685 6.259 K2Vk: 76 0
48 HD 68988 PM* 08 18 22.1728652088 +61 27 38.595044628   8.84 8.19     G1V 154 2
49 HD 72673 PM* 08 32 51.4956803280 -31 30 03.064960317   7.17 6.38     K1V 213 0
50 HD 73526 PM* 08 37 16.4833548528 -41 19 08.790456324   9.69 9.00     G6V 189 2
51 HD 75289 PM* 08 47 40.3893739728 -41 44 12.455319264 7.04 6.94 6.36     F9VFe+0.3 278 1
52 * rho01 Cnc EB* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1103 1
53 HD 76700 PM* 08 53 55.5161171358 -66 48 03.575953228   8.88 8.13     G6V 127 1
54 HD 76151 PM* 08 54 17.9470964696 -05 26 04.054298491 6.89 6.67 6.00     G2V 523 0
55 HD 82943 PM* 09 34 50.7353072232 -12 07 46.369202196   7.17 6.53     F9VFe+0.5 467 2
56 HD 83443 PM* 09 37 11.8275201048 -43 16 19.933774320   9.03 8.24     K0/1V+G(III) 228 1
57 HD 84117 PM* 09 42 14.4162029298 -23 54 56.042043626   5.47 4.94     F9V 200 0
58 HD 92788 PM* 10 42 48.5278074048 -02 11 01.525313004   8.01 7.30     G6V 235 1
59 HD 102117 PM* 11 44 50.4608641248 -58 42 13.357947852   8.20 7.45     G6V 121 1
60 HD 106252 PM* 12 13 29.5095375792 +10 02 29.887248516   8.00   7.0   G0 185 1
61 HD 108147 PM* 12 25 46.2673666032 -64 01 19.516186956   7.532 6.994     F8/G0V 177 1
62 HD 117618 PM* 13 32 25.5556238328 -47 16 16.913213976   7.77 7.17     G0V 125 1
63 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1265 1
64 * alf Cen ** 14 39 40.4 -60 50 20   0.4 -0.1     G2V+K1V 942 0
65 HD 150706 PM* 16 31 17.5830478008 +79 47 23.197555824   7.622 7.016     G0 213 1
66 HD 179949 BY* 19 15 33.2300695008 -24 10 45.671448072   6.772 6.237     F8V 401 1
67 HD 183263 * 19 28 24.5713671072 +08 21 29.004515424   8.51 7.86     G6IV 128 1
68 HD 187123 PM* 19 46 58.1122487784 +34 25 10.281404460       7.4   G2V 242 1
69 HD 213240 PM* 22 31 00.3663354672 -49 25 59.768968116   7.41 6.80     G0/1V 180 1

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2023.11.28-23:18:04

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