- ID:
- ivo://CDS.VizieR/V/124
- Title:
- Approximate elements of eclipsing binaries
- Short Name:
- V/124
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In 1986 Svechnikov M.A. had published the "Catalogue of orbital elements, masses and luminosities" [1] of 246 eclipsing binary systems with known photometric and spectroscopic elements on comparatively early stages of their evolution (on the stage of the main sequence and during or after the "first change of mass") and belonging to DM, SD, DS, KE, KW, DW and AR evolutionary types (see lower) according to Svechnikov's classification [2,3,4]. However the representative eclipsing systems in this catalogue make up only a small share (about 5%) from discovered ones to all eclipsing variable stars of mentioned types (the general catalogue of variable stars [5] (which is called further GCVS IV) contains the information approximately of about 5000 eclipsing binary stars of different types). It is of a great interest for statistic research to give if only the approximate estimations of relative and absolute elements of those systems for which elements of the spectroscopic orbits are unknown and the direct calculation of their absolute characteristics is impossible. For this approximate estimation the statistic relations (mass - luminosity, mass - radius, mass - spectrum etc.) obtained for the components of different type systems [6-9] and a number of other statistic dependences which have been found from study of 246 eclipsing systems mentioned (for example, the dependence of orbital inclination I on the depth of main minimum A1, the dependence of the main component spectral classes for the KE- and KW-systems on the period P etc.) were used. For definition of the approximate elements it was used the information from GCVS IV about the morphological type of systems (EA, EB, EW), its period, the spectral classes of systems, amplitudes A1 and A2 of the main and second minima, duration of eclipse D1 and duration of constant light phase D2 in the main minimum etc., it was made the classification of eclipsing variable stars with the help of a simple test, worked out in [4], and the statistic dependences obtained for the stars of a given type was used later on the question about reliability of approximate relative and absolute elements which have been founded by this way was studied earlier in [8]. The accuracy of these elements is essentially higher for systems with certain spectra of main components (SP1). This fact was taken into account in catalogue by giving the essentially a higher weights to elements of those systems. There are about 1200 systems with the certain meaning SP1 in our catalogue, it is about 1/3 from all eclipsing systems in it. On the whole the elements (with different reability) for about 3800 eclipsing variable stars of DM, SD, DS, KE, KW and DW types are given in catalogue which makes up the overwhelming majority of eclipsing variable stars with the certain period from GCVS IV. Because of the possible mistakes in our classification wrong or incomplete data given in GCVS IV and also because of the fact that used statistic dependences for definition of elements have an approximate character, it should be expect that founded in catalogue the approximate elements for many systems are inaccurate and even wrong. By our estimation, elements will be grossly wrong for about 10-15% of systems given in this catalogue (which principally have a small weights), for about 20- 25% of systems the founded elements will turn out essentially different from veritable, however, we hope that for 60-70% of systems the photometric and absolute elements will turn out quite similar to elements which will be received the more exact methods later on. The elements, given in catalogue, may be used in the different statistic researches and also as an initial approximation for the calculation of photometric and absolute elements of these eclipsing stars with more exact methods.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/437/375
- Title:
- Approximate elements of eclipsing binaries
- Short Name:
- J/A+A/437/375
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The new data on the orbital elements, masses and luminosities have been collected for 31 pre-contact binary systems of short-periodic RS CVn type. The results of statistical treatment of the catalogue data pursue the goal of an accurate definition of the properties and evolutionary status of the given class systems. The ages of pre-contact systems have been estimated by isochrone method. Numerous comments and bibliographic references to the catalogue are accessible.
- ID:
- ivo://CDS.VizieR/J/AJ/117/587
- Title:
- Apsidal motion in double stars. I.
- Short Name:
- J/AJ/117/587
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A catalog of 128 double stars with measured periods of apsidal motion is compiled. Besides the apsidal periods, the orbital elements of binaries and physical parameters of components (masses, radii, effective temperatures, surface gravities) are given. The agreement of the apsidal periods found by various authors is discussed.
- ID:
- ivo://CDS.VizieR/J/MNRAS/460/650
- Title:
- Apsidal motions of 90 SMC eccentric binaries
- Short Name:
- J/MNRAS/460/650
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We examined light curves of 1138 stars brighter than 18.0mag in the I band and less than a mean magnitude error of 0.1mag in the V band from the Optical Gravitational Lensing Experiment (OGLE)-III eclipsing binary catalogue, and found 90 new binary systems exhibiting apsidal motion. In this study, the samples of apsidal motion stars in the Small Magellanic Cloud (SMC) were increased by a factor of about 3.0 than previously known. In order to determine the period of the apsidal motion for the binaries, we analysed in detail both the light curves and eclipse timings using the MACHO (MAssive Compact Halo Objects) and OGLE photometric data base. For the eclipse timing diagrams of the systems, new times of minimum light were derived from the full light curve combined at intervals of one year from the survey data. The new 90 binaries have apsidal motion periods in the range of 12-897yr. An additional short-term oscillation was detected in four systems (OGLE-SMC-ECL-1634, 1947, 3035, and 4946), which most likely arises from the existence of a third body orbiting each eclipsing binary. Since the systems presented here are based on homogeneous data and have been analysed in the same way, they are suitable for further statistical analysis.
- ID:
- ivo://CDS.VizieR/J/other/NewA/48.42
- Title:
- AQ Boo VRI differential light curves
- Short Name:
- J/other/NewA/48.
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We obtained the first VRI CCD light curves of the short-period contact eclipsing binary AQ Boo, which was observed on March 22 and April 19 in 2014 at Xinglong station of National Astronomical Observatories, and on January 20, 21 and February 28 in 2015 at Kunming station of Yunnan Observatories of Chinese Academy of Sciences, China. Using our six newly obtained minima and the minima that other authors obtained previously, we revised the ephemeris of AQ Boo. By fitting the O-C (observed minus calculated) values of the minima, the orbital period of AQ Boo shows a decreasing tendency dP/dt=-1.47(0.17)x10^-17^day/year. We interpret the phenomenon by mass transfer from the secondary (more massive) component to the primary (less massive) one. By using the updated Wilson & Devinney (1971ApJ...166..605W) program, we also derived the photometric orbital parameters of AQ Boo for the first time. We conclude that AQ Boo is a near contact binary with a low contact factor of 14.43%, and will become an over-contact system as the mass transfer continues.
- ID:
- ivo://CDS.VizieR/J/AJ/138/478
- Title:
- AR Boo differential BVR photometry
- Short Name:
- J/AJ/138/478
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- New CCD photometric observations of the eclipsing system AR Boo were obtained from 2006 February to 2008 April. The star's photometric properties are derived from detailed studies of the period variability and of all available light curves.
- ID:
- ivo://CDS.VizieR/J/AJ/129/2798
- Title:
- AR Mon photometry and radial velocities
- Short Name:
- J/AJ/129/2798
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- New differential UBV photoelectric photometry and echelle spectroscopy for the eclipsing binary AR Mon are presented. A total of 46 radial velocities for each component are obtained using the TODCOR procedure. We solve the new and previously published multicolor light curves simultaneously with the new radial velocities using the latest version of the Wilson-Devinney program. We confirm that AR Mon is a semidetached binary consisting of two evolved giant stars and is a member of the rare class of "cool Algols".
- ID:
- ivo://CDS.VizieR/J/AJ/131/633
- Title:
- A ROSAT survey of contact binary stars
- Short Name:
- J/AJ/131/633
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Contact binary stars are common variable stars that are all believed to emit relatively large fluxes of X-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope (Cat. <J/AJ/131/621>) with X-ray data from the ROSAT All Sky Survey (RASS, Cat. <IX/10>) to estimate the X-ray volume emissivity of contact binary stars in the Galaxy. We obtained X-ray fluxes for 140 contact binaries from the RASS, as well as two additional stars observed by the XMM-Newton observatory.
- ID:
- ivo://CDS.VizieR/J/MNRAS/395/593
- Title:
- ASAS chromospherically active eclipsing binaries
- Short Name:
- J/MNRAS/395/593
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have started a spectroscopic survey to identify new chromospherically active components and low-mass pre-main sequence (PMS) stars in recently discovered All Sky Automated Survey (ASAS) eclipsing binaries. In this paper, we briefly describe our scientific motivation, the observing tools and the results obtained from the first phase of this survey. Using the available observing facilities in India, the spectroscopic observations of a sample of 180 candidate eclipsing binary stars selected from ASAS-I&II releases were carried out during 2004-2006. The strength of Halpha emission was used to characterize the level of chromospheric activity. Our spectroscopic survey reveals that out of 180 stars about 36 binary systems show excess Halpha emission. One of the objects in our sample, ASAS 081700-4243.8, displays very strong Halpha emission. Follow-up high-resolution spectroscopic observations reveal that this object is indeed very interesting and most likely a classical Be-type system with K0III companion.
- ID:
- ivo://CDS.VizieR/J/MNRAS/400/969
- Title:
- ASAS detached eclipsing binaries parameters
- Short Name:
- J/MNRAS/400/969
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We derive the absolute physical and orbital parameters for a sample of 18 detached eclipsing binaries from the All-Sky Automated Survey (ASAS) data base based on the available photometry and our own radial velocity (RV) measurements. The RVs are computed using spectra we collected with the 3.9-m Anglo-Australian Telescope (AAT) and its University College London Echelle Spectrograph (UCLES), and the 1.9-m Radcliffe telescope and its Grating Instrument for Radiation Analysis with a Fibre-Fed Echelle (GIRAFFE) at the South African Astronomical Observatory (SAAO). In order to obtain as precise RVs as possible, most of the systems were observed with an iodine cell available at the AAT/UCLES and/or analysed using the two-dimensional cross-correlation technique (TODCOR). The RVs were measured with TODCOR using synthetic template spectra as references.
