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Twin binaries were identified among the eclipsing binaries with $\delta$>--30$^\circ$ listed in the ASAS catalog. In addition to the known twin binaries in the literature, 68 new systems have been identified, photometric and spectroscopic…

Solar and Stellar Astrophysics · Physics 2020-06-16 Volkan Bakış , Zeki Eker , Oguzhan Sarı , Gökhan Yücel , Eda Sonbaş

The analysis of eclipsing binaries containing non-radial pulsators allows: i) to combine two different and independent sources of information on the internal structure and evolutionary status of the components, and ii) to study the effects…

Solar and Stellar Astrophysics · Physics 2015-06-18 C. Maceroni , H. Lehmann , R. da Silva , J. Montalbán , C. -U. Lee , H. Ak , R. Deshpande , K. Yakut , J. Debosscher , Z. Guo , S. -L. Kim , J. W. Lee , J. Southworth

Binaries play key roles in determining stellar parameters and exploring stellar evolution models. We build a catalog of 88 eclipsing binaries with spectroscopic information, taking advantage of observations from both the Large Sky Area…

Solar and Stellar Astrophysics · Physics 2020-08-19 Fan Yang , Richard J. Long , Su-Su Shan , Bo Zhang , Rui Guo , Yu Bai , ZhongRui Bai , KaiMing Cui , Song Wang , Ji-Feng Liu

We present high-precision TESS photometry of V421 Peg (TIC 301747091), an early F-type eclipsing binary containing a candidate $\gamma$ Dor component. The observed short-cadence data allow the detection of pulsation signals, along with…

Solar and Stellar Astrophysics · Physics 2025-10-02 Jae Woo Lee

Single star evolution does not allow extremely low-mass stars to cross the classical instability strip (IS) during the Hubble time. However, within binary evolution framework low-mass stars can appear inside the IS once the mass transfer…

Solar and Stellar Astrophysics · Physics 2017-01-25 P. Karczmarek , G. Wiktorowicz , K. Iłkiewicz , R. Smolec , K. Stępień , G. Pietrzyński , W. Gieren , K. Belczynski

The orbits and physical parameters of three detached, double-lined A-F eclipsing binaries have been derived combining H_P, V_T, B_T photometry from the Hipparcos/Tycho mission with 8500-8750 Ang ground-based spectroscopy, mimicking the…

Gamma Doradus and delta Scuti pulsators cover the transition region between low mass and massive main-sequence stars, and as such, are critical for testing stellar models. When they reside in binary systems, we can combine two independent…

The present work contains light curve, spectroscopic and asteroseismic analyses for KIC 04851217 and KIC 10686876. These systems are detached eclipsing binaries hosting a pulsating component of delta Scuti type and have been observed with…

Solar and Stellar Astrophysics · Physics 2020-10-14 Alexios Liakos

Classical Cepheid variable stars are crucial calibrators of the cosmic distance scale thanks to a relation between their pulsation periods and luminosities. Their archetype, {\delta} Cephei, is an important calibrator for this relation. In…

EL CVn-type eclipsing binaries are composed of a massive A-type main-sequence primary star and a hotter B-type secondary star. This paper presents the time-series photometric and asteroseismic results of the EL CVn-type star 1SWASP…

Solar and Stellar Astrophysics · Physics 2021-11-03 Seung-Lee Kim , Jae Woo Lee , Chung-Uk Lee , Yongseok Lee , Dong-Joo Lee , Kyeongsoo Hong , Sang-Mok Cha , Dong-Jin Kim , Byeong-Gon Park

We analyse TESS light curves for 70 southern $\lambda$ Boo stars to identify binaries and to determine which of them pulsate as $\delta$ Scuti stars. We find two heartbeat stars and two eclipsing binaries among the sample. We calculate that…

Solar and Stellar Astrophysics · Physics 2020-05-20 S. J. Murphy , E. Paunzen , T. R. Bedding , P. Walczak , D. Huber

Heartbeat stars (HBSs) are ideal laboratories for studying the formation and evolution of binary stars in eccentric orbits and their mutual tidal interactions. We present 42 new HBSs discovered based on TESS-SPOC and QLP data. Their…

Solar and Stellar Astrophysics · Physics 2025-10-27 Min-Yu Li , Sheng-Bang Qian , Ai-Ying Zhou , Li-Ying Zhu , Wen-Ping Liao , Lin-Feng Chang , Xiang-Dong Shi , Fu-Xing Li , Qi-Bin Sun , Ping Li

In a robust statistical way, we quantify the uncertainty that affects the calibration of the overshooting efficiency parameter $\beta$ that is owing to the uncertainty on the observational data in double-lined eclipsing binary systems. We…

Solar and Stellar Astrophysics · Physics 2016-02-17 G. Valle , M. Dell'Omodarme , P. G. Prada Moroni , S. Degl'Innocenti

We present a systematic phase curve analysis of known transiting systems observed by the Transiting Exoplanet Survey Satellite (TESS) during year one of the primary mission. Using theoretical predictions for the amplitude of the planetary…

The bright southern binary star beta Centauri (HR 5267) has been observed with the Sydney University Stellar Interferometer (SUSI) and spectroscopically with the ESO CAT and Swiss Euler telescopes at La Silla. The interferometric…

The recently launched NASA Transiting Exoplanet Survey Satellite (TESS) mission is going to collect lightcurves for a few hundred million of stars and we expect to increase the number of pulsating stars to analyze compared to the few…

Solar and Stellar Astrophysics · Physics 2018-11-30 L. Bugnet , R. A. García , G. R. Davies , S. Mathur , O. J. Hall , B. M. Rendle

Eclipsing binary systems with components that pulsate in gravity modes ($g$ modes) allow for simultaneous and independent constraints of the chemical mixing profiles of stars. We aim to assemble a sample of $g$-mode pulsators in detached…

Solar and Stellar Astrophysics · Physics 2020-11-25 S. Sekaran , A. Tkachenko , M. Abdul-Masih , A. Prsa , C. Johnston , D. Huber , S. J. Murphy , G. Banyard , A. W. Howard , H. Isaacson , D. M. Bowman , C. Aerts

Eclipsing binary star systems provide the most accurate method of measuring both the masses and radii of stars. Moreover, they enable testing tidal synchronization and circularization theories, as well as constraining models of stellar…

Astrophysics · Physics 2008-11-04 Jonathan Devor

Classification of over 50000 TESS stars in sectors 1-18 has resulted in the detection of 766 pulsating main sequence B stars as well as over 5000 $\delta$ Scuti, 2300 $\gamma$ Doradus and 114 roAp candidates. It is found that a distinct…

Solar and Stellar Astrophysics · Physics 2020-03-18 Luis A Balona , Dogus Ozuyar

We present a seismic study of the beta Cephei star theta Ophiuchi. Our analysis is based on the observation of one radial mode, one rotationally split l = 1 triplet and three components of a rotationally split l = 2 quintuplet for which the…

Astrophysics · Physics 2009-11-13 M. Briquet , T. Morel , A. Thoul , R. Scuflaire , A. Miglio , J. Montalban , M. -A. Dupret , C. Aerts