Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- IX. Spotted pairs with red giants

Abstract

We present spectroscopic and photometric solutions for three spotted systems with red giant components. Absolute physical and orbital parameters for these double-lined detached eclipsing binary stars are presented for the first time. These were derived from the V-, and I-band ASAS and WASP photometry, and new radial velocities calculated from high quality optical spectra we obtained with a wide range of spectrographs and using the two-dimensional cross-correlation technique (TODCOR). All of the investigated systems (ASAS J184949-1518.7, BQ Aqr, and V1207 Cen) show the differential evolutionary phase of their components consisting of a main sequence star or a subgiant and a red giant, and thus constitute very informative objects in terms of testing stellar evolution models. Additionally, the systems show significant chromospheric activity of both components. They can be also classified as classical RS CVn-type stars. Besides the standard analysis of radial velocities and photometry, we applied spectral disentangling to obtain separate spectra for both components of each analysed system which allowed for a more detailed spectroscopic study. We also compared the properties of red giant stars in binaries that show spots, with those that do not, and found that the activity phenomenon is substantially suppressed for stars with Rossby number higher than $\sim$1 and radii larger than $\sim$20 R${}_{\odot }$.

arXiv commentPublished in MNRAS, 18 pages, 11 figures

References in corpus (42)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Accurate masses and radii of normal stars: modern results and applications
• The WASP Project and the SuperWASP Cameras
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• Towards Better Age Estimates for Stellar Populations: The Y^2 Isochrones for Solar Mixture
• An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
• Correcting systematic effects in a large set of photometric lightcurves
• The RAdial Velocity Experiment (RAVE): Fourth data release
• Eclipsing binaries in open clusters. II. V453 Cyg in NGC 6871
• Search for Associations Containing Young stars (SACY): I. Sample & Searching Method
• CHIRON - A Fiber Fed Spectrometer for Precise Radial Velocities
• The ACS Survey of Galactic Globular Clusters. II. Stellar Evolution Tracks, Isochrones, Luminosity Functions, and Synthetic Horizontal-Branch Models
• Thermohaline instability and rotation-induced mixing. III - Grid of stellar models and asymptotic asteroseismic quantities from the pre-main sequence up to the AGB for low- and intermediate-mass stars at various metallicities
• A New Version of Reimers' law of Mass Loss Based on a Physical Approach
• An Empirical UBVRIJHK Color-Temperature Calibration for Stars
• The Araucaria Project. The distance to the Small Magellanic Cloud from late-type eclipsing binaries
• Generalized investigation of the rotation-activity relation: Favouring rotation period instead of Rossby number
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. I. Stars with a Radiative Core
• Eclipsing binaries in open clusters. III. V621 Per in chi Persei
• A catalog of chromospherically active binary stars (third edition)
• KIC 8410637: a 408-day period eclipsing binary containing a pulsating red giant
• Deep MMT Transit Survey of the Open Cluster M37 III: Stellar Rotation at 550 Myr
• Physical parameters and the projection factor of the classical Cepheid in the binary system OGLE-LMC-CEP-0227
• Self-Consistent Magnetic Stellar Evolution Models of the Detached, Solar-Type Eclipsing Binary EF Aquarii
• High precision orbital and physical parameters of double-lined spectroscopic binary stars - HD78418, HD123999, HD160922, HD200077 and HD210027
• HATS-4b: A Dense Hot-Jupiter Transiting a Super Metal-Rich G Star
• Detached double-lined eclipsing binaries as critical tests of stellar evolution : Age and metallicity determinations from the HR diagram
• Binary orbit, physical properties, and evolutionary state of Capella (alpha Aurigae)
• The impact of correlated noise on SuperWASP detection rates for transiting extra-solar planets
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - VIII. The totally-eclipsing double-giant system HD 187669
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- I. A sample of systems with components' masses between 1 and 2 M${}_{\odot }$
• The araucaria project. An accurate distance to the late-type double-lined eclipsing binary ogle smc113.3 4007 in the small magellanic cloud
• The Araucaria Project. Accurate stellar parameters and distance to evolved eclipsing binary ASAS J180057-2333.8 in Sagittarius Arm
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- II. Two spotted M < 1 M${}_{\odot }$ systems at different evolutionary stages
• Asiago eclipsing binaries program. I. V432 Aur
• MOA-2010-BLG-523: "Failed Planet" = RS CVn Star
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - V. Investigation of subgiants and giants: the case of ASAS J010538-8003.7, ASAS J182510-2435.5, and V1980 Sgr
• Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VI. AK Fornacis - a rare, bright K-type eclipsing binary
• Absolute Properties of the Triple Star CF Tauri
• The chromospherically--active binary CF Tuc revisited

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• The late type eclipsing binaries in the Large Magellanic Cloud: catalogue of fundamental physical parameters
• HIDES spectroscopy of bright detached eclipsing binaries from the $Kepler$ field - II. Double- and triple-lined objects
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries
• Mass-effective temperature-surface gravity relation for intermediate-mass main-sequence stars
• High-resolution spectroscopy of detached eclipsing binaries during total eclipses