Detached Eclipsing Binaries in Compact Hierarchical Triples: Triple-lined systems BD+44 2258 and KIC 06525196

Abstract

Compact Hierarchical Triples (CHT) are systems with the tertiary star orbiting the inner binary in an orbit shorter than 1000 days. CHT with an eclipsing binary as its inner binary can help us extract a multitude of information about all three stars in the system. In this study, we use independent observational techniques to estimate the orbital, stellar, and atmospheric parameters of two triple-lined CHT: BD+442258 and KIC06525196. We find that the masses of stars in BD+442258 are $1.011\pm 0.029M_{\odot }$, $0.941\pm 0.033M_{\odot }$, and $0.907\pm 0.065M_{\odot }$ while in KIC06525196 the estimated masses are $1.0351\pm 0.0055M_{\odot }$, $0.9712\pm 0.0039M_{\odot }$, and $0.777\pm 0.012M_{\odot }$. Using spectral disentangling, we obtained individual spectra of all the stars and combined them with light curve modeling to obtain radii, metallicities, and temperatures. Using stellar evolution models from MESA, we constrain the log(age) of BD+442258 to be 9.89 and 9.49 for KIC06525196. Two stars in BD+442258 are found to be sub-giants while all three stars in KIC06525196 are main-sequence stars. We constrain the mutual inclinations to certain angles for BD+442258 and KIC06525196 using numerical integration. Integrating with tidal interaction schemes and stellar evolution models, we find that KIC06525196 is a stable system. But the inner binary of BD+442258 merges within 550 Myrs. The time of this merger is affected by the orientation of the tertiary, even rushing the collapse by 100 Myrs when the mutual inclination is close to 90 degrees.

arXiv comment16 pages, 14 figures. This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review

References in corpus (58)

• emcee: The MCMC Hammer
• The chemical composition of the Sun
• Modules for Experiments in Stellar Astrophysics (MESA)
• The Transiting Exoplanet Survey Satellite
• 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
• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• The K2 Mission: Characterization and Early results
• Accurate masses and radii of normal stars: modern results and applications
• Stellar Multiplicity
• REBOUND: An open-source multi-purpose N-body code for collisional dynamics
• Observational clues to the progenitors of Type-Ia supernovae
• The High Angular Resolution Multiplicity of Massive Stars
• 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
• WHFast: A fast and unbiased implementation of a symplectic Wisdom-Holman integrator for long term gravitational simulations
• Evolution in Binary and Triple Stars, with an application to SS Lac
• Physics Of Eclipsing Binaries. II. Towards the Increased Model Fidelity
• Modern stellar spectroscopy caveats
• emcee v3: A Python ensemble sampling toolkit for affine-invariant MCMC
• On the triple origin of blue stragglers
• REBOUNDx: A Library for Adding Conservative and Dissipative Forces to Otherwise Symplectic N-body Integrations
• Mergers and Obliquities in Stellar Triples
• A Comprehensive Study of the Kepler Triples via Eclipse Timing
• Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
• Triple-Star Candidates Among the Kepler Binaries
• Eclipse Timing Variation Analyses of Eccentric Binaries with Close Tertiaries in the Kepler field
• Dynamical Formation of Close Binaries During the Pre-main-sequence Phase
• The mass ratio distribution of B-type visual binaries in the Sco OB2 association
• The evolution of stellar triples: The most common evolutionary pathways
• Magnetic topology and surface differential rotation on the K1 subgiant of the RS CVn system HR 1099
• High precision orbital and physical parameters of double-lined spectroscopic binary stars - HD78418, HD123999, HD160922, HD200077 and HD210027
• Orbit alignment in triple stars
• Physics of Eclipsing Binaries. III. Spin-Orbit Misalignment
• The Formation and Evolution of Wide-Orbit Stellar Multiples In Magnetized Clouds
• Physics of Eclipsing Binaries. IV. The impact of interstellar extinction on the light curves of eclipsing binaries
• The TESS light curve of AI Phoenicis
• An analytic model for mass transfer in binaries with arbitrary eccentricity, with applications to triple-star systems
• Six New Compact Triply Eclipsing Triples Found With TESS
• TICs 167692429 and 220397947: The first compact hierarchical triple stars discovered with TESS
• Spot patterns and differential rotation in the eclipsing pre-CV binary,V471 Tau
• Tidally Induced Oscillations and Orbital Decay in Compact Triple-Star Systems
• HIDES spectroscopy of bright detached eclipsing binaries from the $Kepler$ field - II. Double- and triple-lined objects
• HIDES spectroscopy of bright detached eclipsing binaries from the $Kepler$ field - I. Single-lined objects
• Planet Hunters TESS IV: A massive, compact hierarchical triple star system TIC 470710327
• Resolved Gaia Triples
• Von Zeipel - Lidov - Kozai cycles in action: $Kepler$ triples with eclipse depth variations: KICs 6964043, 5653126, 5731312 and 8023317
• Shaping planetary nebulae with jets in inclined triple stellar systems
• On the triple-star origin of the planetary nebula Sh 2-71
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with $K2$ photometry
• HS Hya about to turn off its eclipses
• Analysis of eclipsing binaries in multiple stellar systems: the case of V1200 Centauri
• V907 Sco Switched to the Eclipsing Mode Again
• Consequences of parameterization choice on eclipsing binary light curve solutions

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• Then and now: A new look at the eclipse timing variations of hierarchical triple star candidates in the primordial $Kepler$-field, revisited by TESS
• Precision timing of eclipsing binaries from TESS full frame images. Method and performance
• Spectroscopy of Eclipsing Compact Hierarchical Triples I
• Comprehensive study of five candidate delta Scuti-type pulsators in detached eclipsing binaries
• Discovery of a compact hierarchical triple main-sequence star system while searching for binary stars with compact objects
• High-resolution spectroscopy of detached eclipsing binaries during total eclipses
• Discovery of a hot post-AGB star in Galactic globular cluster E3
• A comprehensive study of $\delta$ Scuti-type pulsators in eclipsing binaries: oscillating eclipsing Algols