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Young close binaries clear central cavities in their surrounding circumbinary disk from which the stars can still accrete material. This process takes place within the very first astronomical units, and is still not well constrained as the…

We report the discovery of a relatively bright eclipsing binary system, which consists of a white dwarf and a main sequence K7 star with clear signs of chromospheric and spot activity. The light curve of this system shows $\sim0.2$mag…

Accreting binary white dwarf systems are among the sources expected to emanate gravitational waves that the Laser Interferometer Space Antenna (LISA) will detect. We investigate how accurately the binary parameters may be measured from LISA…

High Energy Astrophysical Phenomena · Physics 2024-07-04 Sophia Yi , Shu Yan Lau , Kent Yagi , Phil Arras

W Serpentis is an eclipsing binary system and the prototype of the Serpentid class of variable stars. These are interacting binaries experiencing intense mass transfer and mass loss. However, the identities and properties of both stars in W…

We present a detailed V-band photometric light curve modeling of 30 eclipsing binaries using the data from Pietrukowicz et al. (2009) collected with the European Southern Observatory Very Large Telescope (ESO VLT) of diameter 8-m. The light…

V1022 Cas has been known as a spectroscopic binary for a century. It was found to be eclipsing based on photometry from the Hipparcos satellite, and an astrometric orbit was recently obtained from near-infrared interferometry. We present…

Solar and Stellar Astrophysics · Physics 2020-12-22 John Southworth

Eclipsing binaries (EBs) play an important astrophysical role in studying stellar properties and evolution. By analyzing photometric data in the LAMOST Medium-Resolution Survey field, RA: $23^h$$01^m$$51.00^s$, Dec:…

Solar and Stellar Astrophysics · Physics 2024-12-03 Jing-Yi Wang , Kai Li , Xiang Gao , Di-Fu Guo , Li-Heng Wang , Dong-Yang Gao , Ling-Zhi Li , Ya-Ni Guo , Xing Gao , Guo-You Sun

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 space photometric project "Lyra" is developed now in Russia.The project purpose is determination of the photometric information and coordinates of the natural and artificial space objects, from the brightest ones to 16^m in visual…

Instrumentation and Methods for Astrophysics · Physics 2010-02-26 Alexey V. Mironov , Andrey I. Zakharov , Mikhail E. Prokhorov , Feodor N. Nikolaev , Maxim N. Tuchin

We review the results of the 1988 multi-wavelength campaign on the late-type eclipsing binary YY Geminorum. Observations include: broad-band optical and near infra-red photometry, simultaneous optical and ultraviolet (IUE) spectroscopy,…

Solar and Stellar Astrophysics · Physics 2015-06-23 C. J. Butler , N. Erkan , E. Budding , J. G. Doyle , B. Foing , G. E. Bromage , B. J. Kellett , M. Frueh , J. Huovelin , A. Brown , J. E. Neff

We present a detailed analysis of the detached eclipsing binary system HO Telescopii, which contains two A-type stars in a circular orbit of period 1.613 d. We use light curves from the Transiting Exoplanet Survey Satellite (TESS), which…

Solar and Stellar Astrophysics · Physics 2024-08-26 John Southworth

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…

In this paper, we present standard Johnson UBV photometry of the eclipsing binary BD+36 3317 which is known as a member of Delta Lyrae (Stephenson 1) cluster. We determined colors and brightness of the system, calculated E(B - V) color…

Solar and Stellar Astrophysics · Physics 2012-07-03 O. Özdarcan , E. Sipahi , H. A. Dal

New BVRI CCD observations of the semi-detached eclipsing binary EG Cep are presented. The observed light curves are analyzed with the Wilson-Devinney program and new geometrical and photometric elements are derived. These elements are used…

Solar and Stellar Astrophysics · Physics 2014-04-14 Chloi Vamvatira-Nakou , Alexios Liakos , Vassilios Manimanis , Panagiotis Niarchos

We report on a high angular resolution survey of circumstellar disks around 24 northern sky Be stars. The K-band continuum survey was made using the CHARA Array long baseline interferometer (baselines of 30 to 331 m). The interferometric…

We present the analysis of 12227 type-ab RR Lyrae found among the 200 million public lightcurves in the Catalina Surveys Data Release 1 (CSDR1). These stars span the largest volume of the Milky Way ever surveyed with RR Lyrae, covering…

We present an analysis of BS Dra, a detached eclipsing binary containing two almost-identical F3 V stars in a 3.36-d circular orbit, based on 40 sectors of observations from the Transiting Exoplanet Survey Satellite (TESS) and published…

Solar and Stellar Astrophysics · Physics 2026-03-13 John Southworth

This paper contains the list of Hipparcos eclipsing binaries that fulfill the following conditions: the star is classified in the Hipparcos Catalogue as EA-type eclipsing binary and its parallax is either larger than 5 mas or it is five…

Astrophysics · Physics 2007-05-23 A. Kruszewski , I. Semeniuk

Aims: Detect tertiary components of close binaries from spectroscopy and light curve modelling; investigate light-travel time effect and the possibility of magnetic activity cycles; measure mass-ratios for unstudied systems and derive…

Astrophysics · Physics 2009-11-13 T. Szalai , L. L. Kiss , Sz. Meszaros , J. Vinko , Sz. Csizmadia

We present new measurements of the metallicity of 131 RR Lyrae stars in the globular cluster Omega Centauri, using the hk index of the Caby photometric system. The hk method has distinct advantages over Delta-S and other techniques in…

Astrophysics · Physics 2009-10-31 Soo-Chang Rey , Young-Wook Lee , Jong-Myung Joo , Alistair Walker , Scott Baird