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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.
| ICCD Speckle Observations of Binary Stars. XXIII. Measurements during 1982-1997 from Six Telescopes, with 14 New Orbits
We present 2017 observations of 1286 binary stars, observed by means ofspeckle interferometry using six telescopes over a 15 year period from1982 April to 1997 June. These measurements constitute the 23dinstallment in CHARA's speckle program at 2 to 4 m class telescopes andinclude the second major collection of measurements from the MountWilson 100 inch (2.5 m) Hooker Telescope. Orbital elements are alsopresented for 14 systems, seven of which have had no previouslypublished orbital analyses.
| New and Recalculated Orbital Elements of 5 Double Stars
In this paper are given the orbital elements for the following fivedouble stars: ADS 674 A921, ADS 2849 A1831BC, ADS 4002 McA 18Aab,c, WDS07269+2015 = CHARA 26 and ADS 6138 A2869, corresponding astrophysicalquantities (C, H) and also masses and dynamical parallaxes for ADS 674,ADS 2849 and ADS 6138.
| New orbits.
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| Maximum separations among cataloged binaries
The paper classifies many of the widest common-motion binaries listed inthe Aitken catalog and list 72 physical pairs with known photoelectricphotometry, 31 physical pairs without good photometry, and 27 opticalpairs. As a function of primary types, the physical systems have upperlimits to their separations that are exceeded by some of the opticalpairs. The fact that optical pairs occur with larger separations impliesthat the limits are real ones and not just catalog limitations. Thoselimits (in AU) are expressed by 2500 M1 exp 1.54 for B5-KO main-sequenceprimaries. The same limits hold for the Trapezium and hierarchicalsystems studied previously.
| Short-Period Variability of b, a, and F Stars. III. a Survey of Delta Scuti Variable Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969ApJS...19...79B&db_key=AST
| An Investigation of Short-Period Variable Stars. I. The Delta Scuti Stars
Abstract image available at:http://adsabs.harvard.edu/abs/1969ApJS...18..167B
| The frequency of Cepheid binaries
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1968MNRAS.141..109L&db_key=AST
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| Takýmyýldýz: | Boga |
| Sað Açýklýk: | 03h54m27.10s |
| Yükselim: | +05°11'28.0" |
| Görünürdeki Parlaklýk: | 8.892 |
| Uzaklýk: | 245.098 parsek |
| özdevim Sað Açýklýk: | 17 |
| özdevim Yükselim: | -21.6 |
| B-T magnitude: | 9.31 |
| V-T magnitude: | 8.927 |
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