2005PASJ...57...83T


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.15CET12:28:50

2005PASJ...57...83T - Publ. Astron. Soc. Jap., 57, 83-96 (2005/February-0)

Precise differential analysis of stellar metallicities: application to solar analogs including 16 Cyg A and B.

TAKEDA Y.

Abstract (from CDS):

begin{HTML} A method is presented for very accurately establishing the differences of the atmospheric parameters (the effective temperature, the surface gravity, the microturbulent velocity, and the Fe abundance) between two similar stars by using the equivalent widths of Fe <FONT SIZE="-2">I</FONT> and Fe <FONT SIZE="-2">II</FONT> lines, which is a variant of the numerical solution-search approach developed by Takeda et al. (2002, PASJ, 54, 451), while being inspired by the spirit of the orthodox ``differential curve-of-growth'' procedure. By applying this technique to eight selected stars similar to the Sun [HD 20630, 76151, 134987, 181655, 186408 (16 Cyg A), 186427 (16 Cyg B), 195019, and 217014] along with the Sun itself, the parameter differences between any pairs of these stars could be successfully determined to precisions of ∼ 10 K (in D<i>T</i><sub>eff</sub>), ∼ 0.02dex (in Dlog <i>g</i>), ∼0.02 km s<sup>-1</sup> (in D<i>v</i> <sub>t</sub>), and ∼ 0.01 dex (in D<i>A</i> <sub>Fe</sub>). Regarding 16 Cyg A and B, a well-known ``solar twin'' system where a planet has been detected only in B, the metallicities of these two components were concluded to be essentially the same to a level of \lesssim 0.01 dex.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: atmospheres - stars: fundamental parameters - stars: individual (HD 20630, HD 76151, HD 134987, HD 181655, HD 186408, HD 186427, HD 195019, HD 217014 ) - stars: late-type

Simbad objects: 11

goto Full paper

goto View the reference in ADS

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 - 2020
#notes
1 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 811 0
2 HD 76151 PM* 08 54 17.9469808897 -05 26 04.046487788 6.89 6.67 6.00     G2V 462 0
3 * 23 Lib PM* 15 13 28.6671093171 -25 18 33.654699099   7.168 6.46 6.43   G6IV-V 252 1
4 HD 181655 PM* 19 19 38.9988332720 +37 19 49.945432256 7.20 6.99   5.8   G5V 104 0
5 * 16 Cyg A ** 19 41 48.9539315338 +50 31 30.218780803 6.79 6.59 5.95 5.50 5.17 G1.5Vb 665 1
6 * 16 Cyg B PM* 19 41 51.9731830550 +50 31 03.086127222 7.07 6.86 6.20 5.76 5.42 G3V 782 1
7 HD 195019 PM* 20 28 18.6366531368 +18 46 10.179936391 7.730     6.5   G1V 223 1
8 HD 200466 ** 21 02 21.90501 +37 39 13.9374           K0V+K0V 35 0
9 * 51 Peg ** 22 57 27.9804167474 +20 46 07.782240714 6.39 6.16 5.46 4.97 4.61 G2IV 1059 1
10 HD 219542A PM* 23 16 35.2381448976 -01 35 11.480125643   8.88 8.17 8.89   G2V 54 0
11 HD 219542B PM* 23 16 35.4241272649 -01 35 06.954713275   9.284 8.525     G7V 36 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2005PASJ...57...83T and select 'bookmark this link' or equivalent in the popup menu


2019.11.15-12:28:50

© Université de Strasbourg/CNRS

    • Contact