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Pulkovo compilation of radial velocities for 35495 stars in a common system.
Not Available
| Statistics of spectroscopic sub-systems in visual multiple stars
A large sample of visual multiples of spectral types F5-M has beensurveyed for the presence of spectroscopic sub-systems. Some 4200 radialvelocities of 574 components were measured in 1994-2000 with thecorrelation radial velocity meter. A total of 46 new spectroscopicorbits were computed for this sample. Physical relations are establishedfor most of the visual systems and several optical components areidentified as well. The period distribution of sub-systems has a maximumat periods from 2 to 7 days, likely explained by a combination of tidaldissipation with triple-star dynamics. The fraction of spectroscopicsub-systems among the dwarf components of close visual binaries withknown orbits is similar to that of field dwarfs, from 11% to 18% percomponent. Sub-systems are more frequent among the components of widevisual binaries and among wide tertiary components to the known visualor spectroscopic binaries - 20% and 30%, respectively. In triple systemswith both outer (visual) and inner (spectroscopic) orbits known, we findan anti-correlation between the periods of inner sub-systems and theeccentricities of outer orbits which must be related to dynamicalstability constraints. Tables 1, 2, and 6 are only available inelectronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/382/118
| Kinematics of Hipparcos Visual Binaries. II. Stars with Ground-Based Orbital Solutions
This paper continues kinematical investigations of the Hipparcos visualbinaries with known orbits. A sample, consisting of 804 binary systemswith orbital elements determined from ground-based observations, isselected. The mean relative error of their parallaxes is about 12% andthe mean relative error of proper motions is about 4%. However, even 41%of the sample stars lack radial velocity measurements. The computedGalactic velocity components and other kinematical parameters are usedto divide the stars with known radial velocities into kinematical agegroups. The majority (92%) of binaries from the sample are thin diskstars, 7.6% have thick disk kinematics and only two binaries have halokinematics. Among them, the long-period variable Mira Ceti has a verydiscordant {Hipparcos} and ground-based parallax values. From the wholesample, 60 stars are ascribed to the thick disk and halo population.There is an urgent need to increase the number of the identified halobinaries with known orbits and substantially improve the situation withradial velocity data for stars with known orbits.
| The Age Range of Hyades Stars
On the basis of canonical models, the age of Hyades supercluster stars,whether in the Hyades and Praesepe clusters or the noncluster field,ranges from (5-6) x 10^8 to 10^9 yr. The difference between the parallaxderived from the supercluster motion and that obtained from Hipparcosobservations has a dispersion only twice that of the mean dispersion ofthe individual Hipparcos values. The supercluster appears not to containred giants on the first ascent of the red giant branch, but onlyasymptotic giant branch (``clump'') stars. The masses obtained forindividual components of binary stars in the supercluster show adispersion of less than 10% when compared with model predictions.
| A Systematic Search for Members of the Hyades Supercluster - Part Two - the Visual Binaries
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984AJ.....89..839E&db_key=AST
| Orbital elements for twenty-eight visual binaries
In addition to presenting the orbital elements of 22 revised and six newpairs, attention is given to the ephemeris, dynamical parallax, and O-Cresiduals of each star. The stars are 148-BU 1026, 864-A 2308, 1315-HU531, 1530-A 2407, 2578-A 983, 3552-HU 1090, 6291-STF 1130, 6721-STF1211, 6814-HU 714, 7124-HU 718, 7896-A 2768, 8680-HU 640, 8884-A 2489,9185-A 1101, 10158-A 349, 10230-STT 315, 10531-HU 1179, 10912-STF 2244,1236-BU 1129, 12469-Schj 22, BD + 39 3878-Kpr 94, I12577-HU 951, 13169-A606, 14783-H 1 48, 15378-A 889, 15650-A 308, 15902-BU 172, and 17030-A424.
| Micrometer Observations of Double Stars and New Pairs - Part Ten
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
| Orbits of 24 visual binary stars.
Not Available
| Micrometer observations of double stars.I.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978AJ.....83..436M&db_key=AST
| Micrometer observations of double stars.8.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJS...29..315H&db_key=AST
| Mesures d'étoiles doubles faites à Nice
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....6..185C&db_key=AST
| MK Classification of 142 Visual Binaries
Not Available
| Masses, luminosities, colors, and space motions of 228 visual binaries
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1965AJ.....70...19E&db_key=AST
| Mesures d'étoiles doubles faites au réfracteur de 38 cm de l'Observatoire de Nice
Not Available
| Mesures d'étoiles doubles faites aux Observatoires Yerkes et McDonald
Not Available
| Détermination de la masse "hypothétique" et couple de la parallaxe dynamique d'un couple dont le type spectral est inconnu
Not Available
| Eléments Orbitaux de dix étoiles doubles visuelles
Not Available
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משמש של הקבוצה הבאה
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תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | לויתן |
| התרוממות ימנית: | 01h02m45.31s |
| סירוב: | +02°13'41.6" |
| גודל גלוי: | 9.624 |
| תנועה נכונה: | 114.7 |
| תנועה נכונה: | -5.7 |
| B-T magnitude: | 10.52 |
| V-T magnitude: | 9.698 |
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INHABITED SKY
