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Full tests to stellar models below 1 Msun have been hindered until now by the scarce number of precise measurements of the stars' most fundamental parameters: their masses and radii. With the current observational techniques, the required…

Astrophysics · Physics 2007-05-23 Mercedes Lopez-Morales , J. Scott Shaw

Eclipsing binary systems are unique stellar objects to examine and understand the stellar evolution and the formation. Thanks to these systems, the fundamental stellar parameters (mass, radius) can be obtained very precisely. The existence…

Solar and Stellar Astrophysics · Physics 2020-09-30 Filiz Kahraman Alicavus , Fahri Alicavus

We performed a new and accurate fit of light and radial velocity curves of the Large Magellanic Cloud (LMC) Cepheid --OGLE-LMC-CEP-0227-- belonging to a detached double-lined eclipsing binary system. We computed several sets of nonlinear,…

In this study, we present CG Aur's photometric observations obtained in the observing seasons 2011 and 2012, the first available multi-colour light curves. Their shape indicates that the system is an Algol binary. The light curve analyses…

Solar and Stellar Astrophysics · Physics 2012-09-12 Esin Sipahi , Hasan Ali Dal

We present the first detailed investigation of six eclipsing binary systems in the TESS field. The TESS light curves of the targets are analysed by determining the initial effective temperatures via SED fits. The absolute parameters are…

Solar and Stellar Astrophysics · Physics 2023-03-29 Burak Ulas , Vildan Ayan

The bright binary system YZ Cassiopeiae is a remarkable laboratory for studying the Am phenomenon. It consists of a metallic-lined A2 star and an F2 dwarf on a circular orbit, which undergo total and annular eclipses. We present an analysis…

Solar and Stellar Astrophysics · Physics 2015-06-17 K. Pavlovski , J. Southworth , V. Kolbas , B. Smalley

We present high-resolution imaging of the young binary T Tauri in 3 mm continuum emission. Compact dust emission with integrated flux density 50 +/- 6 mJy is resolved in an aperture synthesis map at 0.5" resolution and is centered at the…

Astrophysics · Physics 2009-10-30 R. L. Akeson , D. W. Koerner , E. L. N. Jensen

We have combined the Kepler Eclipsing Binary Catalogue with information from the HES, KIS and 2MASS photometric surveys to produce spectral energy distribution fits to over 2600 eclipsing binaries in the catalogue over a wavelength range of…

Solar and Stellar Astrophysics · Physics 2015-06-17 D. J. Armstrong , Y. Gómez Maqueo Chew , F. Faedi , D. Pollacco

Using data from the extended Kepler mission in K2 Campaign 10 we identify two eclipsing binaries containing white dwarfs with cool companions that have extremely short orbital periods of only 71.2 min (SDSS J1205-0242, a.k.a. EPIC…

We describe a newly-discovered detached M-dwarf eclipsing binary system, the fourth such system known. This system was first observed by the TrES network during a long term photometry campaign of 54 nights. Analysis of the folded light…

We report the analysis of the detached eclipsing spectroscopic binary system LAMOST J101356.33+272410.7, which features a massive white dwarf. Using LAMOST and SDSS spectra, we determined the stellar parameters and radial velocities of both…

The detection of O- and B-type stars with extremely low-mass companions is very important for understanding the formation and evolution of binary stars. However, their finding remains a challenge because the low-mass components in such…

Solar and Stellar Astrophysics · Physics 2024-09-17 Linfeng Chang , Shengbang Qian , Lei Zang , Fuxing Li

We report extensive differential V-band photometry and high-resolution spectroscopy for the 1.14 day, detached, double-lined eclipsing binary BT Vul (F0+F7). Our radial-velocity monitoring and light curve analysis lead to absolute masses…

Solar and Stellar Astrophysics · Physics 2020-05-20 Guillermo Torres , Claud H. Sandberg Lacy , Francis C. Fekel , Matthew W. Muterspaugh

Based on the analysis of the long-term light curve of the young binary DF Tau spanning approximately 125 years, we infer that its brightness variations are associated with changes in the accretion rate from the circumstellar protoplanetary…

We present new spectroscopic observations of the early type, double-lined eclipsing binary V446\,Cep. The radial velocities and the photometric data obtained by $Hipparcos$ were analysed for deriving the astrophysical parameters of the…

Solar and Stellar Astrophysics · Physics 2015-10-09 Ö. Çakırlı , C. Ibanoglu , E. Sipahi , A. Frasca , G. Catanzaro

This study examines the period variation of the eclipsing binary system KR Cyg, a near-contact binary characterized by its short orbital period and significant stellar interactions. The precise orbital parameters of the system have been…

Solar and Stellar Astrophysics · Physics 2025-05-16 Mehmet Geldi , Kübra Çalışkan , Esin Sipahi

We present a study of the detached eclipsing binary TV~Mon using spectra from the LAMOST medium-resolution survey and ASAS-SN, CoRoT photometry. We apply multiple-epochs spectral fitting to derive RV and spectral parameters. The analysis of…

Solar and Stellar Astrophysics · Physics 2024-11-05 Mikhail Kovalev , Zhenwei Li , Jianping Xiong , Azizbek Matekov , Zhang Bo , Xuefei Chen , Zhanwen Han

We present a detailed study of the G0V detached eclipsing binary EW Ori, based on new photometric and spectroscopic observations. Masses and radii that are precise to 0.9% and 0.5%, respectively, have been established for both components.…

Solar and Stellar Astrophysics · Physics 2015-05-14 J. V. Clausen , H. Bruntt , E. H. Olsen , B. E. Helt , A. Claret

We present spatially-resolved X-ray observations of the binary T Tauri star system V710 Tau. Using Chandra's Advanced CCD Imaging Spectrometer (ACIS), we imaged this 3.2'' separation binary system, consisting of a classical T Tauri star,…

Astrophysics · Physics 2009-11-13 Sonali J. Shukla , David A. Weintraub , Joel H. Kastner

Parenago 1802, a member of the ~1 Myr Orion Nebula Cluster, is a double-lined, detached eclipsing binary in a 4.674 d orbit, with equal-mass components (M_2/M_1 = 0.985 \pm 0.029). Here we present extensive VIcJHKs light curves spanning ~15…

Solar and Stellar Astrophysics · Physics 2015-06-03 Y. Gómez Maqueo Chew , K. G. Stassun , A. Prša , E. Stempels , L. Hebb , R. Barnes , R. Heller , R. D. Mathieu
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