On the Connection Between CWA and RVA Stars
Phase plots of ASAS-3 data of a large number of CWA and RVA variablestars reveal that there is no clear distinction in period or light curveshape between these two types of stars.
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Photoelectric observations of Cepheids in UBV(RI)c (Berdnikov, 2008)
This catalog gathers the observation of 894 Cepheids made between 1986to 2004.Observations are listed in alphabetical order of the constellations. Thestandard deviation for every magnitude and color is 0.01mag.This version supersedes the 1997 edition (Cat. )(3 data files).
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The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed between 2004 and 2007
We present a new catalogue of variable stars compiled from the datataken for the University of New South Wales Extrasolar Planet Search.From 2004 October to 2007 May, 25 target fields were each observed forone to four months, resulting in ~87000 high-precision light curves with1600-4400 data points. We have extracted a total of 850 variable lightcurves, 659 of which do not have a counterpart in the General Catalogueof Variable Stars, the New Suspected Variables catalogue or the All SkyAutomated Survey southern variable star catalogue. The catalogue isdetailed here, and includes 142 Algol-type eclipsing binaries, 23 ?Lyrae-type eclipsing binaries, 218 contact eclipsing binaries, 53 RRLyrae stars, 26 Cepheid stars, 13 rotationally variable active stars,153 uncategorized pulsating stars with periods <10 d, including? Scuti stars, and 222 long period variables with variability ontime-scales of >10 d. As a general application of variable starsdiscovered by extrasolar planet transit search projects, we discussseveral astrophysical problems which could benefit from carefullyselected samples of bright variables. These include (i) the quest forcontact binaries with the smallest mass ratio, which could be used totest theories of binary mergers; (ii) detached eclipsing binaries withpre-main-sequence components, which are important test objects forcalibrating stellar evolutionary models and (iii) RR Lyrae-typepulsating stars exhibiting the Blazhko effect, which is one of the lastgreat mysteries of pulsating star research.
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Photometry and radial velocities of cepheids and other variable stars in the Galaxy and the LMC
UBVRIc and radial velocity measurements are presented for Galactic andLMC Cepheids, and for several variables of other type. The photometrycomprises 168 objects with 1790 phases, and the speedometry 15 objectswith 97 phases.
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Stars with the Largest Hipparcos Photometric Amplitudes
A list of the 2027 stars that have the largest photometric amplitudes inHipparcos Photometry shows that most variable stars are all Miras. Thepercentage of variable types change as a function of amplitude. Thiscompilation should also be of value to photometrists looking forrelatively unstudied, but large amplitude stars.
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Precise Coordinates of Variable Stars (1)
Not Available
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Study of Neglected Variable Stars Classified as Type II Cepheids
Four variable stars classified as Type II Cepheids have been studiedpartly based on new photometry and the Hipparcos photometric data. Thecorrect period is derived for V341 Ara and NW Pav and it is pointed outthat RR Mic and V1711 Sgr do not belong to Type II Cepheids, insteadthey may be semi-regular variables. The cycle length of theirvariability is also determined.
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Improved Positions of Variable Stars in Northern Pavo
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A catalogue of field Type II Cepheids
A catalogue of field Type II Cepheids is presented. The primary listconsists of 152 Cepheids sufficiently far from the galactic plane to bevery probably Type II stars. A second list contains 56 additional starsthat are likely, but less certain, Type II Cepheids, including bothstars estimated to be at large distances from the galactic plane butwith uncertain distances and stars close to the galactic plane believedto be Type II for independent reasons.
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Photometric abundances of Type II Cepheid variables
Washington-system colors and V magnitudes of 63 Type II Cepheids areused to investigate the distribution of metal abundances in these starsand correlations of their abundances with position in the Galaxy. Only asmall fraction of Cepheids in the field represent a true halopopulation; most have characteristics of a transition population betweenthe halo and the disk. The origin of the metal-rich stars and theirrelation to the metal-rich RR Lyraes is discussed. The abundancedistribution of all Type II Cepheids shows no strong dependence ondistance from the galactic center.
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60th Name-List of Variable Stars
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Mitteilungen uber Veraenderliche der Bamberger Liste.
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121 neue südliche Veränderliche
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