- ID:
- ivo://CDS.VizieR/J/AcA/66/421
- Title:
- Eclipsing binaries in the Magellanic System
- Short Name:
- J/AcA/66/421
- Date:
- 22 Feb 2022
- Publisher:
- CDS
- Description:
- We present the collection of eclipsing binaries in the Large and Small Magellanic Clouds, based on the OGLE survey. It contains 48605 systems, 40204 belonging to the LMC and 8401 to the SMC. Out of the total number of presented here binaries, 16374 are the new discoveries. We present the time-series photometry obtained for the selected objects during the fourth phase of the OGLE project. The catalog has been created using a two step machine learning procedure based on the Random Forest algorithm.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/326/1044
- Title:
- Eclipsing binaries uvbyHbeta photometry
- Short Name:
- J/A+A/326/1044
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Systematic differences in photometric stellar surface gravity determination are studied by means of the comparison with empirical values derived from detached double-lined eclipsing binaries. Photometric gravities were computed using Moon & Dworetsky (1985MNRAS.217..305M) grids based on Kurucz (1979ApJS...40....1K) atmosphere models, and empiric al gravities were taken from Andersen (1991A&ARv...3...91A). Individual Stroemgren colours and {beta} indices of each component of the binary system have to be taken into account to correctly analyze the observed differences. A compilation of data on a sample containing 30 detached double-lined eclipsing binaries with accurate (=~1-2%) determination of mass and radius and available uvbyH_{beta}_ photometric data is also presented. Correction of the differences in terms of T_eff_ and logg for the range 11000K<T_eff_<20000K reduces the mean residuals from 0.13dex to 0.07dex. For the range 7000K<T_eff_<8500K, the consideration of metallicity effects by means of {delta}m_o_ index improves the accuracy from 0.20dex to 0.09dex.
- ID:
- ivo://CDS.VizieR/J/A+A/324/137
- Title:
- Eclipsing binaries with candidate CP stars
- Short Name:
- J/A+A/324/137
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photometry in the Geneva systems and radial velocities are used to determine the fundamental parameters of three eclipsing binaries, two of which having been classified as chemically peculiar and the third having relatively narrow lines. For a description of the Geneva photometric system, see e.g. <GCPD/13>
- ID:
- ivo://CDS.VizieR/J/A+A/297/359
- Title:
- Eclipsing binary HU Tauri
- Short Name:
- J/A+A/297/359
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The photometric elements of HU Tauri are derived from an analysis of its blue and visual light curves using the Wilson and Devinney (1971, ApJ 166, 605) light curve synthesis method. Combining the photometric elements and spectroscopic orbital elements the absolute dimensions of the system are derived.
- ID:
- ivo://CDS.VizieR/J/A+A/557/A119
- Title:
- Eclipsing binary system LL Aquarii
- Short Name:
- J/A+A/557/A119
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The eclipsing binary LL Aqr consists of two late-type stars in an eccentric orbit with a period of 20.17d. We use an extensive light curve from the SuperWASP survey augmented by published radial velocities and UBV light curves to measure the physical properties of the system. The primary star has a mass of 1.167+/-0.009M_{sun}_ and a radius of 1.305+/-0.007R_{sun}_. The secondary star is an analogue of the Sun, with a mass and radius of 1.014+/-0.006M_{sun}_ and 0.990+/-0.008R_{sun}_ respectively. The system shows no signs of stellar activity: the upper limit on spot-induced rotational modulation is 3mmag, it is slowly rotating, has not been detected at X-ray wavelengths, and the calcium H and K lines exhibit no emission. Theoretical stellar models provide a good match to its properties for a sub-solar metal abundance of Z=0.008 and an age of 2.5Gyr. Most low-mass eclipsing binary systems are found to have radii larger than expected from theoretical predictions, blamed on tidally-enhanced magnetic fields in these short- period systems. The properties of LL Aqr support this scenario: it exhibits negligible tidal effects, shows no signs of magnetic activity, and matches theoretical models well.
- ID:
- ivo://CDS.VizieR/J/MNRAS/378/179
- Title:
- Eclipsing Binary with Eccentric Orbits Catalog
- Short Name:
- J/MNRAS/378/179
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A new catalog of eclipsing binary stars with eccentric orbits is presented. The catalog lists the physical parameters (including apsidal motion parameters) of 124 eclipsing binaries with eccentric orbits. In addition, the catalog also contains a list of 150 candidate systems, about which fewer details are known at present.
- ID:
- ivo://CDS.VizieR/J/A+A/557/A13
- Title:
- 3 eclipsing high-mass binaries light curve
- Short Name:
- J/A+A/557/A13
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the first results of a comprehensive photometric O-star survey performed with a robotic twin refractor at the Universitatssternwarte Bochum located near Cerro Armazones in Chile. For three high-mass stars, Pismis 24-1, CPD-51 8946, and HD 319702, we determined the period through the Lafler-Kinman algorithm and modelled the light curves within the framework of the Roche geometry.
- ID:
- ivo://CDS.VizieR/J/ApJ/831/89
- Title:
- Eclipsing LMXB at the center of 3FGL J0427.9-6704
- Short Name:
- J/ApJ/831/89
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of an eclipsing low-mass X-ray binary at the center of the 3FGL error ellipse of the unassociated Fermi/Large Area Telescope {gamma}-ray source 3FGL J0427.9-6704. Photometry from OGLE and the SMARTS 1.3m telescope and spectroscopy from the SOAR telescope have allowed us to classify the system as an eclipsing low-mass X-ray binary (P=8.8hr) with a main-sequence donor and a neutron-star accretor. Broad double-peaked H and He emission lines suggest the ongoing presence of an accretion disk. Remarkably, the system shows separate sets of absorption lines associated with the accretion disk and the secondary, and we use their radial velocities to find evidence for a massive (~1.8-1.9M_{sun}_) neutron-star primary. In addition to a total X-ray eclipse with a duration of ~2200s observed with NuSTAR, the X-ray light curve also shows properties similar to those observed among known transitional millisecond pulsars: short-term variability, a hard power-law spectrum ({Gamma}~1.7), and a comparable 0.5-10keV luminosity (~2.4x10^33^erg/s). We find tentative evidence for a partial (~60%) {gamma}-ray eclipse at the same phase as the X-ray eclipse, suggesting the {gamma}-ray emission may not be confined to the immediate region of the compact object. The favorable inclination of this binary is promising for future efforts to determine the origin of {gamma}-rays among accreting neutron stars.
- ID:
- ivo://CDS.VizieR/J/A+A/492/637
- Title:
- Eddington ratios of faint AGN
- Short Name:
- J/A+A/492/637
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use one of the deepest spectroscopic samples of broad-line active galactic nuclei (AGN) currently available, extracted from the VIMOS VLT Deep Survey (VVDS, Cat. <III/250>), to compute the MgII and CIV virial-mass estimates of 120 super-massive black holes in the redshift range 1.0<z<1.9 and 2.6<z<4.3.
- ID:
- ivo://CDS.VizieR/J/ApJS/248/33
- Title:
- Edge-on HI-rich LSB galaxies from ALFALFA
- Short Name:
- J/ApJS/248/33
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Low surface brightness galaxies (LSBGs) are defined as galaxies that are fainter than dark night sky and are important for studying our universe. Particularly, edge-on galaxies are useful for the study of rotational velocity and dynamical properties of galaxies. Hence here we focus on searching for edge-on LSBGs. In order to find these edge-on dim galaxies, a series of effects caused by inclination, including the surface brightness profile, internal extinction, and scale length, have been corrected. In this work, we present a catalog of 281 edge-on LSBG candidates, which are selected from the crossmatch between Sloan Digital Sky Survey Data Release 7 and the 40% ALFALFA catalog. We also present the properties of these edge-on LSBG candidates including the absolute magnitude, central surface brightness, B-V color, scale length, and relative thickness. Our result suggests that the correction of inclination effects is very important for obtaining a complete sample of LSBGs.
