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All available photometric and spectroscopic observations were collected and used as the basis of a detailed analysis of the close binary IM Mon. The orbital period of the binary was refined to 1.19024249(0.00000014) days. The Roche…

Solar and Stellar Astrophysics · Physics 2015-05-28 H. Bakis , V. Bakis , S. Bilir , Z. Mikulasek , M. Zejda , E. Yaz , O. Demircan , I. Bulut

Multiband CCD photometric observations of SZ Her were obtained between 2008 February and May. The light curve was completely covered and indicated a significant temperature difference between both components. The light-curve synthesis…

Solar and Stellar Astrophysics · Physics 2015-06-03 Jae Woo Lee , Chung-Uk Lee , Seung-Lee Kim , Ho-Il Kim , Jang-Ho Park

We present a binary-based reassessment of the age of the intermediate-age open cluster NGC 7789, together with well-constrained stellar parameters for twelve components in six SB2 systems, including two eclipsing binaries. Our analysis…

Solar and Stellar Astrophysics · Physics 2026-01-26 Kadri Yakut , Belinda Kalomeni , Saul Rappaport

We present the visual orbit of the double-lined spectroscopic binary HD 224355 from interferometric observations with the CHARA Array, as well as an updated spectroscopic analysis using echelle spectra from the Apache Point Observatory 3.5m…

We present spectroscopic and photometric observations of the eclipsing binary V32 located in the central field of the globular cluster NGC 6397. The variable is a single-line spectroscopic binary with an orbital period of 9.8783d and a…

Astrophysics · Physics 2009-11-13 J. Kaluzny , I. B. Thompson , S. M. Rucinski , W. Krzeminski

We report spectroscopic and differential photometric observations of the A-type system V482 Per that reveal it to be a rare hierarchical quadruple system containing two eclipsing binaries. One has the previously known orbital period of 2.4…

Solar and Stellar Astrophysics · Physics 2017-09-20 Guillermo Torres , Claud H. Sandberg Lacy , Francis C. Fekel , Marek Wolf , Matthew W. Muterspaugh

We present new photometric observations in the BVRI bands of the double-lined eclipsing binary BD+05 706 conducted over three observing seasons, as well as new X-ray observations obtained with the ROSAT satellite covering a full orbital…

We present new V-band differential brightness measurements as well as new radial-velocity measurements of the detached, circular, 0.84-day period, double-lined eclipsing binary system CV Boo. These data along with other observations from…

Astrophysics · Physics 2009-11-13 Guillermo Torres , Luiz Paulo R. Vaz , Claud H. Sandberg Lacy

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

Our discovery of 1SWASP J093010.78+533859.5 as a probable doubly eclipsing quadruple system containing a contact binary with P~0.23 d and a detached binary with P~1.31 d was announced in 2013. Subsequently Koo et al. confirmed the detached…

Solar and Stellar Astrophysics · Physics 2015-06-17 M. E. Lohr , A. J. Norton , E. Gillen , R. Busuttil , U. C. Kolb , S. Aigrain , A. McQuillan , S. T. Hodgkin , E. González

We have analyzed the double-lined eclipsing binary system OGLE-LMC-CEP-1812 in the LMC and demonstrate that it contains a classical fundamental mode Cepheid pulsating with a period of 1.31 days. The secondary star is a stable giant. We…

Solar and Stellar Astrophysics · Physics 2015-05-30 G. Pietrzynski , I. Thompson , D. Graczyk. , W. Gieren , B. Pilecki , A. Udalski , I. Soszynski , G. Bono , P. Konorski , N. Nardetto , J. Storm

The spectroscopic binary system HD 66051 (V414 Pup) consists of a highly peculiar CP3 (HgMn) star and an A-type component. It also shows out-of-eclipse variability that is due to chemical spots. This combination allows the derivation of…

Solar and Stellar Astrophysics · Physics 2018-07-18 E. Paunzen , M. Fedurco , K. G. Helminiak , O. I. Pintado , F. -J. Hambsch , S. Huemmerich , E. Niemczura , K. Bernhard , M. Konacki , S. Hubrig , L. Fraga

In this paper we present the first results of a detailed spectroscopic and photometric analysis of the V = 11.7m eclipsing binary ASAS J052821+0338.5. With the FIES spectrograph at the Nordic Optical Telescope we have obtained a series of…

Astrophysics · Physics 2009-11-13 H. C. Stempels , L. Hebb , K. G. Stassun , J. Holtzman , N. Dunstone , L. Glowienka , S. Frandsen

Using Liverpool Telescope+RISE photometry we identify the 2.78 hour period binary star CSS 41177 as a detached eclipsing double white dwarf binary with a 21,100K primary star and a 10,500K secondary star. This makes CSS 41177 only the…

Solar and Stellar Astrophysics · Physics 2015-05-28 S. G. Parsons , T. R. Marsh , B. T. Gänsicke , A. J. Drake , D. Koester

New spectroscopic observations of the double-lined eclipsing binary AQ\,Cas are presented. All available spectroscopic and photometric observations have been analysed for the fundamental properties of the components. Analyses show that the…

Solar and Stellar Astrophysics · Physics 2015-06-15 C. Ibanoglu , O. Cakirli , E. Sipahi

We present the Kepler photometric light-variation analysis of the late-type double-lined binary system V568 Lyr that is in the field of the high metallicity old open cluster NGC 6791. The radial velocity and the high-quality short-cadence…

Solar and Stellar Astrophysics · Physics 2015-09-16 K. Yakut , P. P. Eggleton , B. Kalomeni , C. A. Tout , J. J. Eldridge

Oscillating Algol-type eclipsing binaries (oEA) are very interesting objects that have three observational features of eclipse, pulsation, and mass transfer. Direct measurement of their masses and radii from the double-lined radial velocity…

Solar and Stellar Astrophysics · Physics 2016-03-16 Jae-Rim Koo , Jae Woo Lee , Kyeongsoo Hong , Seung-Lee Kim , Chung-Uk Lee

Algol ($\beta$ Persei) is the prototypical semi-detached eclipsing binary and a hierarchical triple system. From 2006 to 2010 we obtained 121 high-resolution and high-S/N \'{e}chelle spectra of this object. Spectral disentangling yields the…

Solar and Stellar Astrophysics · Physics 2015-06-04 V. Kolbas , K. Pavlovski , J. Southworth , C. -U. Lee , D. -J. Lee , J. W. Lee , S. -L. Kim , H. -I. Kim , B. Smalley , A. Tkachenko

We report the detection of stellar eclipses in the LP 661-13 system. We present the discovery and characterization of this system, including high resolution spectroscopic radial velocities and a photometric solution spanning two observing…

We aim at constraining evolutionary models at low mass and young ages by identifying interesting transiting system members of the nearest OB association to the Sun, Upper Scorpius, targeted by the Kepler mission. We produced light curves…