2014A&A...561A..21S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST09:25:09

2014A&A...561A..21S - Astronomy and Astrophysics, volume 561A, 21-21 (2014/1-1)

A new procedure for defining a homogenous line-list for solar-type stars.

SOUSA S.G., SANTOS N.C., ADIBEKYAN V., DELGADO-MENA E., TABERNERO H.M., GONZALEZ HERNANDEZ J.I., MONTES D., SMILJANIC R., KORN A.J., BERGEMANN M., SOUBIRAN C. and MIKOLAITIS S.

Abstract (from CDS):

The homogenization of the stellar parameters is an important goal for large observational spectroscopic surveys, but it is very difficult to achieve it because of the diversity of the spectroscopic analysis methods used within a survey, such as spectrum synthesis and the equivalent width method. To solve this problem, constraints to the spectroscopic analysis can be set, such as the use of a common line-list. We present a procedure for selecting the best spectral lines from a given input line-list, which then allows us to derive accurate stellar parameters with the equivalent width method. To select the lines, we used four very well known benchmark stars, for which we have high-quality spectra. From an initial line-list, the equivalent width of each individual line was automatically measured for each benchmark star using ARES, then we performed a local thermodynamic equilibrium analysis with MOOG to compute individual abundances. The results allowed us to choose the best lines, which give consistent abundance values for all the benchmark stars from which we then created a final line-list. To verify its consistency, the compiled final line-list was tested for a small sample of stars. These stars were selected to cover different ranges in the parameter space for FGK stars. We show that the obtained parameters agree well with previously determined values.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: abundances - stars: statistics - methods: data analysis

VizieR on-line data: <Available at CDS (J/A+A/561/A21): table2.dat>

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 HD 2071 PM* 00 24 42.5485223710 -53 59 02.396695788   7.95 7.27     G2V 65 0
2 * mu. Cas SB* 01 08 16.39470 +54 55 13.2264 5.93 5.86 5.17 4.55 4.13 G5Vb 534 1
3 HD 22918 RG* 03 40 47.4326726910 -02 19 57.662814057   7.91 6.95     K1V 56 0
4 HD 72769 PM* 08 33 45.7057745106 -23 21 19.967599403   7.95 7.21     G8IV-V 75 0
5 * mu. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 394 1
6 HD 102200 Pe* 11 45 34.2344518332 -46 03 46.386462682   9.13 8.76     F2V 94 0
7 HD 105671 PM* 12 09 54.9816785086 -46 12 30.209114297 10.648 9.573 8.438 7.777 7.239 K4Vk: 65 0
8 * 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 2090 0
9 HD 125455 PM* 14 19 34.8634227884 -05 09 04.290184448 8.946 8.426 7.569 7.093 6.664 K1V 113 1
10 HD 179949 PM* 19 15 33.2300861317 -24 10 45.673372382   6.772 6.237     F8V 338 1
11 HD 221580 PM* 23 33 40.1542788235 -53 39 29.295486517   9.86 9.21     G8/K1wF 29 0

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2019.10.14-09:25:09

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