Photoelectric Minima of Selected Eclipsing Binaries and Maxima of Pulsating Stars
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A catalogue of eclipsing variables
A new catalogue of 6330 eclipsing variable stars is presented. Thecatalogue was developed from the General Catalogue of Variable Stars(GCVS) and its textual remarks by including recently publishedinformation about classification of 843 systems and making correspondingcorrections of GCVS data. The catalogue1 represents thelargest list of eclipsing binaries classified from observations.
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Photoelectric Minima of Selected Eclipsing Binaries and Maxima of Pulsating Stars
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A photometric pilot study on Sonneberg archival patrol plates. How many ``constant'' stars are in fact long-term variables?
The light curves of 216 arbitrarly chosen field stars and of 23 knownvariables in the Aur/Tau/Ori region were derived (7.8 m ≤ B ≤12.2 m) from scanned, blue-sensitive archival patrol plates, covering atotal of 34 years (1961-1995). We achieved a photometric accuracy of0.07 ... 0.12 mag in spite of rather unfavourable locations of moststars near the plate borders. 17 field stars turned out to be variables,most of them with time scales of 1000-8000 days in the form of slowwaves with amplitudes between 0.1 and 0.3 mag, i.e. below the thresholdof traditional variable searches on photographic plates. About 50% ofthese new long-term variables exhibit drifts indicating periodic orerratic variability at much longer time scales than covered here. Forthe 23 known variables we achieved improvements in their periods andamplitudes and detected long-term variations (drifts, waves) in about50% of them. The above fraction of low-amplitude long-term variablesamong field stars implies that a total of about 45 000 new variablesshould be detectable in the Sonneberg patrol plate archive. They willrepresent a new, hitherto not investigated population of variable starswith a possibly significant impact on our understanding of the stellarinterior and evolution.Tables 2 and 3 are only available in electronic form athttp://www.edpsciences.org
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163. List of Minima Timings of Eclipsing Binaries by BBSAG Observers
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Catalogue of Algol type binary stars
A catalogue of (411) Algol-type (semi-detached) binary stars ispresented in the form of five separate tables of information. Thecatalogue has developed from an earlier version by including more recentinformation and an improved layout. A sixth table lists (1872) candidateAlgols, about which fewer details are known at present. Some issuesrelating to the classification and interpretation of Algol-like binariesare also discussed.Catalogue is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/417/263
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Searching for Intrinsic Variations in Eclipsing Binary Stars
Using a database of nearly 4000 visual estimates made by the authorbetween 1967 and 1993, evidence for intrinsic variations on a time scaleof years is sought after 64 eclipsing binary stars. While none is foundfor most stars, certainb objects warrant further investigation.
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A photoelectric investigation of the eclipsing binary SV Tauri
SV Tauri is an Algol-type eclipsing binary with P = 2.1669 d and V = 9.7m at maximum light. The primary minimum is 1.1 m deep, the secondaryminimum 0.1 m, and the eclipses are partial. Photoelectron UBVobservations were obtained between 1981 and 1988 with the 0.4 mtelescope No. 4 at KPNO and with the 1.0 m reflector of the USNOFlagstaff Station. The light curves were analyzed using both the WINKmethod and the SIMPLEX algorithm. SV Tauri proves to be a typicalsemidetached Algol-type system with the secondary component filling itsRoche lobe. Earlier analyses, based on visual and photographicobservations, indicated orbital eccentricity, but the observations andanalyses in this study show that the orbit is circular. The spectralclasses of the components are B9 V and G5 IV. The values derived for r1,r2, and the mass ratio are 0.29, 0.27, and 0.28, respectively.
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Photoelectric Minima of Eclipsing Binaries
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An Analysis of the Eclipsing Binary System SV Tauri
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The system of RS Sagittari
New photoelectric times of minimum light of RS Sgr are reported. Aperiod study of all available individual times of minimum light gives asmall or negligible variation of the period. Absolute dimensions werederived from recent measures of the lines of the fainter component. RSSgr appears to be a semidetached Algol-like system. Taken for grantedthat the period variation is real, RS Sgr is thought to be apostmass-exchange object probably in the slow phase of evolution.
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An Updated List of Eclipsing Binaries Showing Apsidal Motion
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A Catalogue of Classical Evolved Algol-Type Binary Candidate Stars
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Information on the Photoelectric Observations of Variable Stars Deposited at Odessa Astronomical Observatory
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Statistics of categorized eclipsing binary systems Lightcurve shapes, periods, and spectral types
The statistics of the light curve morphologies, eclipse depths, orbitalperiods, and spectral types of about 1000 eclipsing binary systems areexamined, after attempting to subdivide these binaries into variousbasic evolutionary categories. The applicability of statisticalcriteria, based on light curve morphologies and eclipse depths, for thecategorization of eclipsing binaries has been found more limited thanpreviously believed. In particular, EW-type light curves turn out to begood indicators of contact systems (though not conversely), while EA-and EB-type light curves have little physical significance. Moreover,the study reveals a strong deficit of short-period noncontact systems inthe whole spectral range, together with an underabundance of early-typecontact binaries (compared with the number of late-type contact pairs).Interestingly, the distribution of evolved Algol-type systems isshifted, on average, to periods longer than those of unevolved detachedsystems in the OB and early A spectral range (and to shorter periods inthe F spectral range).
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IAU Archives of Unpublished Observations of Variable Stars
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UBV Photometry of the Eclipsing Binary System SV Tauri
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Observational results of the Berliner Arbeitsgemeinschaft fuer Veraenderliche Sterne e.V. /BAV/
Results of observations of variable stars derived from 10,000 individualevaluations are presented for the years 1978 and 1979. Included are 172minima of 75 eclipsing binaries; 70 maxima of 17 RR Lyrae stars; 309results on 93 Mira stars; 90 results on 19 long-period, semi-regular,irregular and RV Tauri stars; and 6 results on 5 eruptive variablestars.
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Visual minima of eclipsing variables
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A catalogue of parameters for eclipsing binaries
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Photoelectrically-Neglected Eclipsing Binaries
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Minima of Eclipsing Variables
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Visual minima of eclipsing binaries from Cracow observations in 1920-1950.
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The light curves of 14 eclipsing variables.
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Strömgren four-colour observations of Northern Hemisphere binary systems
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Investigation of Changes in Periods of Eclipsing Variables
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The hydrogen-deficient carbon stars
Abstract image available at:http://adsabs.harvard.edu/abs/1967MNRAS.137..119W
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Ephemerides of eclipsing stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963AJ.....68..257W&db_key=AST
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Minima and periods of eclipsing stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959AJ.....64..258W&db_key=AST
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Minima and periods of eclipsing stars.
Abstract image available at:http://adsabs.harvard.edu/abs/1954AJ.....59..454W
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