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We present the first detailed spectroscopic and photometric analysis of an eclipsing binary in the Andromeda Galaxy (M31). This is a 19.3-mag semi-detached system with components of late-O and early-B spectral types. From the light and…

We report the discovery of a single-lined spectroscopic binary with an Ultra Cool Dwarf (UCD) primary with a spectral type between M8 and L0.5. This system was discovered during the course of an ongoing survey to monitor L dwarfs for radial…

We present a detailed study of the F-type detached eclipsing binary BK Peg, based on new photometric and spectroscopic observations. The two components, which have evolved to the upper half of the main-sequence band, are quite different…

Solar and Stellar Astrophysics · Physics 2015-05-18 J. V. Clausen , S. Frandsen , H. Bruntt , E. H. Olsen , B. E. Helt , K. Gregersen , D. Juncher , P. Krogstrup

We present a comprehensive study of the massive binary system HM1~8, based on multi-epoch high resolution spectroscopy, $V$-band photometry and archival X-ray data. Spectra from the OWN Survey, a high resolution optical monitoring of…

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

EPIC 216747137 is a new HW~Virginis system discovered by the Kepler spacecraft during its K2 "second life". Like the other HW Vir systems, EPIC 216747137 is a post-common-envelope eclipsing binary consisting of a hot subluminous star and a…

Solar and Stellar Astrophysics · Physics 2020-11-04 R. Silvotti , V. Schaffenroth , U. Heber , R. H. Østensen , J. H. Telting , J. Vos , D. Kilkenny , L. Mancini , S. Ciceri , A. Irrgang , H. Drechsel

A survey of 30 nearby M6.0-M7.5 dwarfs with Ks<12 mag utilizing the Hokupa'a adaptive optics system at the Gemini North Telescope has discovered 3 new binary systems. All 3 systems have separations between 0.12-0.29 arcsec (3-10 AU) with…

Astrophysics · Physics 2009-11-10 Nick Siegler , Laird M. Close , Eric E. Mamajek , Melanie Freed

Aim: Our purpose is to provide reliable stellar parameters for a significant sample of eclipsing binaries, which are representative of a whole dwarf and metal-poor galaxy. We also aim at providing a new estimate of the mean distance to the…

Solar and Stellar Astrophysics · Physics 2015-05-19 P. L. North , R. Gauderon , F. Barblan , F. Royer

Detached eclipsing binaries are a fundamental tool for measuring the physical parameters of stars that are effectively evolving in isolation. Starting from more than 40,000 eclipsing binary candidates identified by the All-Sky Automated…

Solar and Stellar Astrophysics · Physics 2022-09-21 D. M. Rowan , T. Jayasinghe , K. Z. Stanek , C. S. Kochanek , Todd A. Thompson , B. J. Shappee , T. W. -S. Holoien , J. L. Prieto , W. Giles

We searched the SuperWASP archive for objects displaying multiply periodic photometric variations. Specifically we sought evidence for eclipsing binary stars displaying a further non-harmonically related signal in their power spectra. The…

Solar and Stellar Astrophysics · Physics 2016-02-17 A. J. Norton , M. E. Lohr , B. Smalley , P. J. Wheatley , R. G. West

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 photometric and spectroscopic data for three double-lined detached eclipsing binaries were collected from the photometric and spectral surveys. The light and radial velocity curves of each binary system were simultaneously analyzed by…

Solar and Stellar Astrophysics · Physics 2021-02-10 D. -Y. Yang , L. -F. Li , Q. -W. Han

We present the observational results of this kind of rare object 1SWASP J093010.78+533859.5, for which the doubly eclips- ing feature had been detected previously from the SuperWASP photometric archive. Individual PSF photometry for two…

Solar and Stellar Astrophysics · Physics 2015-06-18 Jae-Rim Koo , Jae Woo Lee , Byeong-Cheol Lee , Seung-Lee Kim , Chung-Uk Lee , Kyeongsoo Hong , Dong-Joo Lee , Soo-Chang Rey

We have begun a programme to obtain high-precision photometry of bright detached eclipsing binary (dEB) stars with the Wide field InfraRed Explorer (WIRE) satellite. Due to the small aperture of WIRE only stars brighter than V=6 can be…

Astrophysics · Physics 2009-11-11 H. Bruntt , J. 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

Context. The fact that eclipsing binaries belong to a stellar group is useful, because the former can be used to estimate distance and additional properties of the latter, and vice versa. Aims. Our goal is to analyse new spectroscopic…

Astrophysics of Galaxies · Physics 2016-03-02 E. Kıran , P. Harmanec , Ö. L. Değirmenci , M. Wolf , J. Nemravová , M. Šlechta , P. Koubský

To add to the growing collection of well-studied double periodic variables (DPVs) we have carried out the first spectroscopic and photometric analysis of the eclipsing binary DQ Velorum to obtain its main physical stellar and orbital…

Solar and Stellar Astrophysics · Physics 2013-03-12 D. Barría , R. E. Mennickent , L. Schmidtobreick , G. Djurasević , Z. Kołaczkowski , G. Michalska , M. Vucković , E. Niemczura

We present the discovery of six new triple stellar system candidates composed of an inner eccentric-orbit eclipsing binary with an apsidal motion. These stars were studied using new, precise TESS light curves and a long-term collection of…

Solar and Stellar Astrophysics · Physics 2024-03-26 P. Zasche , Z. Henzl , M. Wolf

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

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