The TESS light curve of AI Phoenicis

Abstract

Accurate masses and radii for normal stars derived from observations of detached eclipsing binary stars are of fundamental importance for testing stellar models and may be useful for calibrating free parameters in these model if the masses and radii are sufficiently precise and accurate. We aim to measure precise masses and radii for the stars in the bright eclipsing binary AI Phe, and to quantify the level of systematic error in these estimates. We use several different methods to model the TESS light curve of AI Phe combined with spectroscopic orbits from multiple sources to estimate precisely the stellar masses and radii together with robust error estimates. We find that the agreement between different methods for the light curve analysis is very good but some methods underestimate the errors on the model parameters. The semi-amplitudes of the spectroscopic orbits derived from spectra obtained with modern echelle spectrographs are consistent to within 0.1%. The masses of the stars in AI Phe are $M_1=1.1938\pm 0.0008M_{\odot }$ and $M_2=1.2438\pm 0.0008M_{\odot }$, and the radii are $R_1=1.8050\pm 0.0022R_{\odot }$ and $R_2=2.9332\pm 0.0023R_{\odot }$. We conclude that it is possible to measure accurate masses and radii for stars in bright eclipsing binary stars to a precision of 0.2% or better using photometry from TESS and spectroscopy obtained with modern echelle spectrographs. We provide recommendations for publishing masses and radii of eclipsing binary stars at this level of precision.

Accepted for publication in MNRAS. 12 pages, 4 tables and 8 figures

References in corpus (8)

• The Transiting Exoplanet Survey Satellite
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Physics Of Eclipsing Binaries. II. Towards the Increased Model Fidelity
• Eclipse Timing Variation Analyses of Eccentric Binaries with Close Tertiaries in the Kepler field
• The Stagger-grid: A grid of 3D stellar atmosphere models - IV. Limb darkening coefficients
• The Asteroseismic Target List (ATL) for solar-like oscillators observed in 2-minute cadence with the Transiting Exoplanet Survey Satellite (TESS)
• HIDES spectroscopy of bright detached eclipsing binaries from the $Kepler$ field - III. Spectral analysis, updated parameters, and new systems
• The Araucaria Project: High-precision orbital parallax and masses of eclipsing binaries from infrared interferometry

Cited by in corpus (37)

• The effect of tides on near-core rotation: analysis of 35 Kepler $\gamma$ Doradus stars in eclipsing and spectroscopic binaries
• Discovery of $\beta$ Cep pulsations in the eclipsing binary V453 Cygni
• Analysis of apsidal motion in eclipsing binaries using TESS data II. A test of internal stellar structure}
• Triply eclipsing triple stars in the northern TESS fields: TICs 193993801, 388459317 and 52041148
• High-mass pulsators in eclipsing binaries observed using TESS
• SPInS, a pipeline for massive stellar parameter inference: A public Python tool to age-date, weigh, size up stars, and more
• Fundamental effective temperature measurements for eclipsing binary stars I. Development of the method and application to AI Phoenicis
• A beta Cephei pulsator and a changing orbital inclination in the high-mass eclipsing binary system VV Orionis
• The surface brightness - colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
• Characterization of the variability in the O+B eclipsing binary HD 165246
• Transmission spectroscopy with VLT FORS2: a featureless spectrum for the low-density transiting exoplanet WASP-88b
• Four bright eclipsing binaries with gamma Doradus pulsating components: CM Lac, MZ Lac, RX Dra and V2077 Cyg
• NGTS clusters survey -- III: A low-mass eclipsing binary in the Blanco 1 open cluster spanning the fully convective boundary
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with $K2$ photometry
• KIC 7955301: a hierarchical triple system with eclipse timing variations and an oscillating red giant
• Tidally Perturbed Oblique Pulsations in the Hierarchical Triple System V1031 Orionis
• Statistical view of orbital circularisation with 14 000 characterised TESS eclipsing binaries
• The ESO UVES/FEROS Large Programs of TESS OB pulsators. I. Global stellar parameters from high-resolution spectroscopy
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries
• The Pre-He White Dwarfs in Eclipsing Binaries. III. WASP 1625-04
• Detached Eclipsing Binaries in Compact Hierarchical Triples: Triple-lined systems BD+44 2258 and KIC 06525196
• Fundamental effective temperature measurements for eclipsing binary stars -- IV. Selection of new benchmark stars and first results for HD 22064
• Fundamental effective temperature measurements for eclipsing binary stars -- II. The detached F-type eclipsing binary CPD-54 810
• Surface brightness-colour relations of dwarf stars from detached eclipsing binaries -- I. Calibrating sample
• $\delta$ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642
• V772 Cas: an ellipsoidal HgMn star in an eclipsing binary
• Weighing stars from birth to death: mass determination methods across the HRD
• Asteroseismology of the young open cluster NGC 2516 II. Constraining cluster age using gravity-mode pulsators
• Rotational synchronisation of B-type binaries in 30 Doradus
• The nature of the eccentric doubled-lined eclipsing binary system KIC 2306740 with Kepler space photometry
• Detailed Evolutionary Models for Twins in Sight of New Spectral Data: AN Cam, RS Ari, and V455 Aur
• Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis
• Consequences of parameterization choice on eclipsing binary light curve solutions
• The SDSS-HET Survey of Kepler Eclipsing Binaries. A Sample of Four Benchmark Binaries
• Using Computational Models to Uncover the Parameters of Three Kepler Binaries: KIC 5957123, KIC 8314879, and KIC 10727668
• Analysis of TESS field eclipsing binary star V948 Her: a pulsating or non-pulsating star?
• Diversity in Evolutionary Status and Magnetic Activity among Solar-Type Twin Detached Eclipsing Binaries