High-resolution spectroscopy of detached eclipsing binaries during total eclipses

Abstract

We present results of high-resolution spectroscopic observations of detached eclipsing binaries (DEBs) with total eclipses, for which UVES spectra were obtained during the phase of totality. With the additional, independent information on effective temperature and metallicity of one of the components, we aimed at estimating the precise ages of the studied binaries, and show the usefulness of totality spectra. We also provide precise orbital and physical stellar parameters of the components of systems in question. Using the VLT/UVES we obtained high-resolution spectra of 11 DEBs during their total eclipse phase. Atmospheric parameters of then-visible (larger) components were obtained with iSpec. With additional spectroscopy from the CRÉME project, public archives, and literature, we obtained radial velocity (RV) measurements, from which orbital parameters were calculated. Photometric time-series observations from TESS and ASAS were modelled with the JKTEBOP code, and, combined with RV-based results, allowed us to obtain physical parameters for nine double-lined systems from our sample. All the available data were used to constrain the ages with our own approach, utilising MESA isochrones. Reddening-free, isochrone-based distances were also estimated, and confronted with Gaia DR3. We show that single spectroscopic observations taken during a total eclipse can break the age-metallicity degeneracy, and allow for precise determination of the age of a DEB, down to 5-10% level of uncertainty. Even for single-lined DEBs, where absolute masses are not possible to obtain, the spectroscopic analysis of one of the components allows one to put strong constraints on the properties of both stars. For some cases we noted inconsistencies between isochrone-based and GDR3 distances. For one binary, which could not be fitted with a single isochrone (RZ Eri) we suggest a new explanation.

22 pages with appendices, 7 tables, 11 figures, abstract abbreviated, Author's Accepted Manuscript before layout corrections, accepted in Astronomy & Astrophysics

References in corpus (43)

• The Gaia mission
• Modules for Experiments in Stellar Astrophysics (MESA)
• Gaia Data Release 3: Summary of the content and survey properties
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• Accurate masses and radii of normal stars: modern results and applications
• The PLATO 2.0 Mission
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec
• The angular size of dwarf stars and subgiants - Surface brightness relations calibrated by interferometry
• Eclipsing binaries in open clusters. II. V453 Cyg in NGC 6871
• Modern stellar spectroscopy caveats
• The Araucaria Project. The distance to the Small Magellanic Cloud from late-type eclipsing binaries
• Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
• Isochrone ages for field dwarfs: method and application to the age-metallicity relation
• GU Boo: A New 0.6 Msun Detached Eclipsing Binary
• The influence of atomic diffusion on stellar ages and chemical tagging
• The Gaia FGK Benchmark Stars - High resolution spectral library
• The evolution of stellar triples: The most common evolutionary pathways
• Tidal Synchronization and Differential Rotation of Kepler Eclipsing Binaries
• Grid Search in Stellar Parameters: a software for spectrum analysis of single stars and binary systems
• High precision orbital and physical parameters of double-lined spectroscopic binary stars - HD78418, HD123999, HD160922, HD200077 and HD210027
• The Catalogue of Stellar Parameters from the Detached Double-Lined Eclipsing Binaries in the Milky Way
• Evolution of stellar collision products in open clusters. II. A grid of low-mass collisions
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - VIII. The totally-eclipsing double-giant system HD 187669
• A magnetic massive star has experienced a stellar merger
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - IV. A 0.61 + 0.45 M_sun binary in a multiple system
• HIDES spectroscopy of bright detached eclipsing binaries from the $Kepler$ field - II. Double- and triple-lined objects
• Models for Sixty Double-Lined Binaries containing Giants
• SUPPNet: Neural network for stellar spectrum normalisation
• The surface brightness - colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with $K2$ photometry
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries
• Detached Eclipsing Binaries in Compact Hierarchical Triples: Triple-lined systems BD+44 2258 and KIC 06525196
• Fundamental effective temperature measurements for eclipsing binary stars -- II. The detached F-type eclipsing binary CPD-54 810
• Fundamental effective temperature measurements for eclipsing binary stars -- IV. Selection of new benchmark stars and first results for HD 22064
• Comprehensive spectroscopic and photometric study of pulsating eclipsing binary star AI Hya
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- IX. Spotted pairs with red giants
• Spectroscopy of Eclipsing Compact Hierarchical Triples I