DI Herculis as a test of internal stellar structure and general relativity - New apsidal motion rate and evolutionary models

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Table 1:

Observational parameters for DI Her.
Parameter	Primary	Secondary
Mass m ( $M_{\odot}$ )	$5.17 \pm 0.11$	$4.524 \pm 0.066$
Radius R ( $R_{\odot}$ )	$2.681 \pm 0.046$	$2.478 \pm 0.046$
Effective temperature (K)	$17~300 \pm 800$	$15~400 \pm 800$
$v \sin\beta$ (km s^-1)	$108 \pm 4$	$116 \pm 4$
$\lambda$ (deg)	$+72 \pm 4$	$-84 \pm 8$
$\log k_2$	$-2.10 \pm 0.05$	$-2.13 \pm 0.05$
Orbital period P (days)^*	$10.5501696 \pm 0.0000007$
Reference epoch T₀ (HJD)	$2~447~372.9567 \pm 0.0005$
$\omega_0$ at reference epoch (deg)	$330.0 \pm 0.1$
Orbital eccentricity e	$0.4895 \pm 0.0008$
Orbital inclination i (deg)	$89.30 \pm 0.07$
$\dot\omega_{\rm obs}$ (deg cycle^-1)	$0.00042 \pm 0.00012$

Notes. ^(*) P corresponds here to the sidereal period $P_{\rm s}$ .

Source LaTeX | All tables | In the text

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