Absolute parameters for the F-type eclipsing binary BW Aquarii

TL;DR

This paper refines the absolute parameters of the eclipsing binary BW Aquarii using improved analysis of Kepler K2 data and radial velocity measurements, providing precise stellar characteristics for testing stellar models.

Contribution

It presents updated and more accurate stellar parameters for BW Aquarii by combining light curve analysis with radial velocity data, enhancing previous measurements.

Findings

Consistent parameters with previous studies.

Improved error estimates for stellar masses and radii.

Enhanced data analysis methods for eclipsing binaries.

Abstract

BW Aqr is a bright eclipsing binary star containing a pair of F7V stars. The absolute parameters of this binary (masses, radii, etc.) are known to good precision so they are often used to test stellar models, particularly in studies of convective overshooting. ... Maxted & Hutcheon (2018) analysed the Kepler K2 data for BW Aqr and noted that it shows variability between the eclipses that may be caused by tidally induced pulsations. ... Table 1 shows the absolute parameters for BW Aqr derived from an improved analysis of the Kepler K2 light curve plus the RV measurements from both Imbert (1979) and Lester & Gies (2018). ... The values in Table 1 with their robust error estimates from the standard deviation of the mean are consistent with the values and errors from Maxted & Hutcheon (2018) based on the PPD calculated using emcee for a fit to the entire K2 light curve.