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The ages of the components in very short period pre-main sequence (PMS) binaries are essential to an understanding of their formation. We considered a sample of 7 PMS eclipsing binaries (EBs) with ages 1 to 6.3 MY and component masses 0.2…

Solar and Stellar Astrophysics · Physics 2017-06-14 M. Simon , J. Toraskar

The eclipsing binary LL Aqr consists of two late-type stars in an eccentric orbit with a period of 20.17 d. We use an extensive light curve from the SuperWASP survey augmented by published radial velocities and UBV light curves to measure…

Solar and Stellar Astrophysics · Physics 2015-06-16 John Southworth

OO Peg is a detached eclipsing binary system containing two late-A-type stars in a circular orbit with a period of 2.985 d. Using published spectroscopic results and a light curve from the Transiting Exoplanet Survey Satellite (TESS) we…

Solar and Stellar Astrophysics · Physics 2024-04-02 John Southworth

Comprehensive analysis of optical spectroscopy and space photometry of the solar type eclipsing binary system KIC\,4832197 is presented. The system is composed of F7V + F9V components with masses of $M_{1}=1.16\pm0.12~M_{\odot}$,…

Solar and Stellar Astrophysics · Physics 2023-06-21 Orkun Özdarcan , Hasan Ali Dal , Ezgi Yoldaş

We combine precision radial velocity data from four different published works of the stars in the Leo II dwarf spheroidal galaxy. This yields a dataset that spans 19 years, has 14 different epochs of observation, and contains 372 unique red…

Astrophysics of Galaxies · Physics 2017-06-14 Meghin Spencer , Mario Mateo , Matthew Walker , Edward Olszewski , Alan McConnachie , Evan Kirby , Andreas Koch

An early-type, massive, short-period ($P_{\rm orb}=2^{\rm d}.310951$) eclipsing spectroscopic binary DN Cas has been re-visited with new spectral and photometric data. The masses and radii of the components have been obtained as…

Solar and Stellar Astrophysics · Physics 2016-09-21 V. Bakis , H. Bakis , S. Bilir , Z. Eker

V455 Aur is a detached eclipsing binary containing two F-stars in a 3.15-d orbit with a small eccentricity. Its eclipses were discovered in data from the Hipparcos satellite and a spectroscopic orbit was obtained by Griffin (2001, 2013).…

Solar and Stellar Astrophysics · Physics 2021-06-09 John Southworth

Evolutionary models of pre-main sequence stars remain largely uncalibrated, especially for masses below that of the Sun, making each new dynamical mass and radius measurement a valuable test of theoretical models. Stellar mass dependent…

Solar and Stellar Astrophysics · Physics 2015-05-22 Adam L. Kraus , Ann Marie Cody , Kevin R. Covey , Aaron C. Rizzuto , Andrew W. Mann , Michael J. Ireland

We present new V-band differential photometry and radial-velocity measurements of the unevolved 1.18-day period F+G-type double-lined eclipsing binary VZ Cep. We determine accurate values for the absolute masses, radii, and effective…

Astrophysics · Physics 2008-10-30 Guillermo Torres , Claud H. Sandberg Lacy

Double-lined eclipsing binaries allow the direct determination of masses and radii, which are key to test stellar models. With the launch of the TESS mission, many well-known eclipsing binaries have been observed at higher photometric…

Solar and Stellar Astrophysics · Physics 2022-09-07 D. Baroch , A. Giménez , J. C. Morales , I. Ribas , E. Herrero , V. Perdelwitz , C. Jordi , T. Granzer , C. Allende Prieto

We present a complete set of physical parameters for three early-type eclipsing binary systems in the Large Magellanic Cloud (LMC): OGLE LMC-ECL-17660, OGLE LMC-ECL-18794, and HV 2274, together with the orbital solutions. The first and…

We present the first full orbital and physical analysis of HD 187669, recognized by the All-Sky Automated Survey (ASAS) as the eclipsing binary ASAS J195222-3233.7. We combined multi-band photometry from the ASAS and SuperWASP public…

This paper presents and discusses a critical compilation of accurate, fundamental determinations of stellar masses and radii. We have identified 95 detached binary systems containing 190 stars (94 eclipsing systems, and alpha Centauri) that…

Solar and Stellar Astrophysics · Physics 2010-01-22 G. Torres , J. Andersen , A. Gimenez

We present absolute physical and orbital parameters for three double-lined detached eclipsing binary systems from the All Sky Automated Survey (ASAS) catalogue with subgiant and giant components. These parameters were derived from archival…

Solar and Stellar Astrophysics · Physics 2013-06-21 M. Ratajczak , K. G. Hełminiak , M. Konacki , A. Jordan

We present here the results of astrometric, photometric and spectroscopic observations leading to the determination of the orbit and dynamical masses of the binary L dwarf 2MASSW J0746425+2000321. High angular resolution observations spread…

The K2 eclipsing binary candidates EPIC 211982753 (hereinafter called EPIC2753) and EPIC 211915147 (hereinafter called EPIC5147) are characterized with the help of photometric and high-resolution spectroscopic data. The light curve analysis…

Solar and Stellar Astrophysics · Physics 2023-03-01 Alaxender Panchal , Y. C. Joshi , Peter De Cat , Patricia Lampens , Aruna Goswami , S. N. Tiwari

We analyse new spectra of the multiple system SZ Cam because previous studies found different values of the primary radial velocity amplitude. The older solutions of light curves also have different ratios of secondary to primary luminosity…

Solar and Stellar Astrophysics · Physics 2015-05-20 Pavel Mayer , Horst Drechsel , Jiří Kubát , Miroslav Šlechta

Individual components of well-detached binary systems are assumed to be two single-like stars with a common origin, i.e. they share the same chemical composition and same age. Therefore, one expects to fit the observed parameters of both…

Astrophysics · Physics 2007-05-23 E. Lastennet , J. Fernandes , E. Oblak , D. Valls-Gabaud

We report the detection of a very low mass star (VLMS) companion to the primary star 1SWASPJ234318.41+295556.5A (J2343+29A), using radial velocity (RV) measurements from the PARAS (PRL Advanced Radial-velocity Abu-sky Search) high…

Solar and Stellar Astrophysics · Physics 2016-07-13 Priyanka Chaturvedi , Abhijit Chakraborty , B. G. Anandarao , Arpita Roy , Suvrath Mahadevan
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