2017A&A...608A..62H


Query : 2017A&A...608A..62H

2017A&A...608A..62H - Astronomy and Astrophysics, volume 608A, 62-62 (2017/12-1)

Testing stellar evolution models with detached eclipsing binaries.

HIGL J. and WEISS A.

Abstract (from CDS):

Stellar evolution codes, as all other numerical tools, need to be verified. One of the standard stellar objects that allow stringent tests of stellar evolution theory and models, are detached eclipsing binaries. We have used 19 such objects to test our stellar evolution code, in order to see whether standard methods and assumptions suffice to reproduce the observed global properties. In this paper we concentrate on three effects that contain a specific uncertainty: atomic diffusion as used for standard solar model calculations, overshooting from convective regions, and a simple model for the effect of stellar spots on stellar radius, which is one of the possible solutions for the radius problem of M dwarfs. We find that in general old systems need diffusion to allow for, or at least improve, an acceptable fit, and that systems with convective cores indeed need overshooting. Only one system (AI Phe) requires the absence of it for a successful fit. To match stellar radii for very low-mass stars, the spot model proved to be an effective approach, but depending on model details, requires a high percentage of the surface being covered by spots. We briefly discuss improvements needed to further reduce the freedom in modelling and to allow an even more restrictive test by using these objects.

Abstract Copyright: © ESO, 2017

Journal keyword(s): stars: evolution - stars: interiors - binaries: eclipsing - binaries: eclipsing

Simbad objects: 38

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Number of rows : 38
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* MU Cas EB* 00 15 51.5603463336 +60 25 53.642838468   11.12 10.80     A0 51 0
2 V* AI Phe EB* 01 09 34.1924055096 -46 15 56.071719360   9.26 8.60     G3V 139 0
3 V* TZ For EB* 03 14 40.0925678952 -35 33 27.594929088   7.620 6.878     F7III+G8III 126 0
4 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3208 0
5 OGLE LMC-CEP-227 cC* 04 52 15.6979950672 -70 14 31.242378408     15.317   14.438 ~ 51 0
6 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1160 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16153 1
8 V* UX Men EB* 05 30 03.1855215048 -76 14 55.350331296   8.80 8.24   7.608 F8V 116 0
9 HD 37071 EB* 05 37 32.5090124664 +37 05 12.259074408   8.59 8.05     G0 67 0
10 V* V578 Mon EB* 06 32 00.6076651296 +04 52 40.886334120 8.01 8.72 8.55 8.09 8.28 B0V+B1V 104 0
11 NGC 2516 OpC 07 58 06 -60 48.0           ~ 652 0
12 V* AI Hya EB* 08 18 47.4972221712 +00 17 00.612058128   9.77 9.35     F2m+F0V 107 0
13 * 20 LMi PM* 10 01 00.6568762394 +31 55 25.213014837   6.02   4.9   G3VaHdel1 373 0
14 NAME Centaurus A Sy2 13 25 27.6039817176 -43 01 09.493008456   8.18 6.84 6.66   ~ 4263 3
15 V* V636 Cen EB* 14 16 57.9122377992 -49 56 42.372930480   9.70 9.09     G0V 91 0
16 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 91 0
17 V* V501 Her EB* 17 35 43.4522396928 +30 38 35.034390240   9.5       ~ 24 0
18 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1885 1
19 NGC 6475 OpC 17 53 47 -34 50.5           ~ 356 0
20 V* V906 Sco EB* 17 53 54.7731227 -34 45 09.785378   5.95 5.96     B9V+B9V 120 0
21 HD 169689 EB* 18 25 38.7990783216 +08 01 55.225743564   6.545 5.665     G9II+B9V 102 0
22 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1902 0
23 Kepler-16 EB* 19 16 18.1758378936 +51 45 26.782726104   12.1   11.90   K7V 222 1
24 V* V565 Lyr EB* 19 20 49.3769291736 +37 46 09.059900844   18.612 17.658 17.197   ~ 38 0
25 NGC 6791 OpC 19 20 53 +37 46.7   10.52 9.5     ~ 961 0
26 V* V568 Lyr EB* 19 20 57.3346763352 +37 45 36.739962972   18.295   16.823   ~ 42 0
27 Cl* NGC 6791 SBG 12390 EB* 19 21 06.4750041288 +37 47 27.625816644   18.84 17.89 17.142   ~ 19 0
28 HD 185351 PM* 19 36 37.9768465728 +44 41 41.761562352   6.109 5.169     G8.5IIIbFe-0.5 135 0
29 NGC 6811 OpC 19 37 22 +46 22.7   7.47 6.8     ~ 308 0
30 Cl* NGC 6811 SAN 195 EB* 19 37 50.5849731839 +46 35 23.043686145   12.77 12.230   11.83 A1m 32 0
31 Cl* NGC 6809 SAW V54 EB* 19 39 37.4254963176 -30 57 03.998922228           ~ 11 0
32 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 810 0
33 NGC 6819 OpC 19 41 18 +40 11.4   8.21 7.3     ~ 547 0
34 NGC 6819 259 EB* 19 41 33.9265890792 +40 13 00.247822320   16.356 15.651   14.774 ~ 37 1
35 V* V380 Cyg EB* 19 50 37.3267754400 +40 35 59.135141652 4.86 5.613 5.680     B1.1III+B2.5/3V: 280 0
36 V* V453 Cyg EB* 20 06 34.9661707872 +35 44 26.269865844 7.83 8.52 8.40     B0.4IV+B0.7IV 200 0
37 * kap01 Ind EB* 21 58 30.0792344784 -59 00 43.723465560   6.607 6.141     F5V 69 0
38 V* WX Cep EB* 22 31 15.7881709512 +63 31 21.554196312   9.38 9.00     A5V+A2V 101 0

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2022.08.10-07:49:36

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