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We report an eclipse timing variations (ETV) study to identify close, stellar mass companions to the eclipsing binaries monitored during the photometric survey OGLE-IV. We also present an alternative automatic way to determine the first and…

太阳与恒星天体物理 · 物理学 2021-10-20 Tamás Hajdu , Tamás Borkovits , Emese Forgács-Dajka , János Sztakovics , Attila Bódi

We present light curves and periods of 53 candidates for short period eclipsing binary stars identified by SuperWASP. These include 48 newly identified objects with periods <2x10^4 seconds (~0.23d), as well as the shortest period binary…

In this study we identify 11 Kepler systems (KIC 5255552, 5653126, 5731312, 7670617, 7821010, 8023317, 10268809, 10296163, 11519226, 11558882 and 12356914) with a "flip-flop" effect in the eclipse timing variations O-C diagrams of the…

太阳与恒星天体物理 · 物理学 2020-09-02 A. K. Getley , B. Carter , R. King , S. O'Toole

We report a study of the eclipse timing variation (ETV) of short period ($P_1\le 6^d$) eclipsing binaries (EB) monitored during the photometric survey OGLE-IV. From the 425\,193 EBs we selected approximately 80\,000 binaries that we found…

太阳与恒星天体物理 · 物理学 2019-03-05 T. Hajdu , T. Borkovits , E. Forgács-Dajka , J. Sztakovics , G. Marschalkó , G. Kutrovátz

A sample of 542 eclipsing binaries (EBs) with periods shorter than 2 d were selected from the Microlensing Observations in Astrophysics (MOA) EB catalogue (Li et al. 2017) for eclipse-time variation analysis. For this sample we were able to…

We re-analyze the pristine eclipsing binary data from the $\textit{Kepler}$ and TESS missions, focusing on eccentricity measurements at short orbital periods to emperically constrain tidal circularization. We find an average circularization…

太阳与恒星天体物理 · 物理学 2022-05-04 J. J. Zanazzi

KIC 2835289 is a triple stellar system that consists of an inner ellipsoidal variable with an orbital period of ~0.86 days and an outer star that eclipses the inner pair every ~750 days. Two eclipse events were observed by the Kepler…

太阳与恒星天体物理 · 物理学 2015-04-20 Kyle Conroy , Andrej Prsa , Keivan Stassun , Jerome Orosz

GT\,Cep is a semi-detached close binary system with an orbital period of 4.91 days, containing a massive star. I have obtained spectroscopic observations and derived radial velocities of both components. Combining the analyses of radial…

太阳与恒星天体物理 · 物理学 2015-06-22 Ö. Çakırlı

We present high-speed ULTRACAM and SOFI photometry and X-shooter spectroscopy of the recently discovered 94 minute orbital period eclipsing white dwarf / main-sequence binary SDSS J085746.18+034255.3 (CSS 03170) and use these observations…

A short period eclipsing binary star CV Boo is tested for the possible existence of additional bodies in the system with a help of the light equation method. We use data on the moments of minima from the literature as well as from our…

(Abridged) We present spectroscopic and photometric observations of the eclipsing system V1061 Cyg (P = 2.35 days). We show that it is a hierarchical triple in which the third star is visible in the spectra. We combine the radial velocities…

Using the 1-m telescope at Ritter Observatory, we took 36 observations of zeta^2 Coronae Borealis with a fiber-fed echelle spectrograph. From these observations, zeta^2 CrB was found to be a triple system and a new spectroscopic orbit was…

天体物理学 · 物理学 2009-10-28 K. D. Gordon , C. L. Mulliss

New CCD observations for thirteen eccentric eclipsing binaries from the Large Magellanic Cloud were carried out using the Danish 1.54-meter telescope located at the La Silla Observatory in Chile. These systems were observed for their times…

太阳与恒星天体物理 · 物理学 2015-12-15 P. Zasche , M. Wolf , J. Vrastil , L. Pilarcik

In a recent study, Armstrong et al. presented an eclipsing binary star of about 6.2 h period with transit-like tertiary signals occurring every 204.2 d in the {\it Kepler} public data of KIC002856960 and proposed three possible hierarchical…

太阳与恒星天体物理 · 物理学 2015-06-12 Jae Woo Lee , Seung-Lee Kim , Chung-Uk Lee , Byeong-Cheol Lee , Byeong-Gon Park , Tobias Cornelius Hinse

The study of very short-period contact binaries provides an important laboratory in which the most important and problematic astrophysical processes of stellar evolution take place. Short-period contact systems, such as CC Com are…

太阳与恒星天体物理 · 物理学 2024-11-20 Dolunay Koçak

We report the detection of eclipses in LSPM J1112+7626, which we find to be a moderately bright (I_C = 12.14 +/- 0.05) very low-mass binary system with an orbital period of 41.03236 +/- 0.00002 days, and component masses M_1 = 0.395 +/-…

BD And is a fairly bright (V = 10.8), active and close (P = 0.9258 days) eclipsing binary. The cyclic variability of the apparent orbital period as well as third light in the light curves indicate the presence of an additional late-type…

太阳与恒星天体物理 · 物理学 2020-08-19 T. Pribulla , L. Hambalek , E. Guenther , R. Komzik , E. Kundra , J. Nedoroscik , V. Perdelwitz , M. Vanko

We present new long-term CCD photometry for EP And acquired during the period 2007 to 2012. The light curves display total eclipses at primary minima and season-to-season light variability. Our synthesis for all available light curves…

太阳与恒星天体物理 · 物理学 2015-06-12 Jae Woo Lee , Tobias Cornelius Hinse , Jang-Ho Park

ZZ UMa is a detached eclipsing binary with an orbital period of 2.299 d that shows total eclipses and starspot activity. We used five sectors of light curves from the Transiting Exoplanet Survey Satellite (TESS) and two published sets of…

太阳与恒星天体物理 · 物理学 2022-10-11 John Southworth