Tartalom
Képek
Kép feltöltése
DSS Images Other Images
Kapcsolódó cikkek
A preliminary compilation of DS-programme star positions
A catalog is presented of the double-star-program (DS-program) starpositions, listing right ascensions for 930 DSs and declinations for1225 DSs of the program. The positions were compiled from the observedvalues obtained between 1980 and 1987 with the meridian circles of sixUSSR observatories (the Moscow, Kazan', Kiev, Khar'kov, Odessa, andTashkent Observatories) and the Belgrade Observatory. The measurementsand the treatment of the observational material were performed using therelative method, and the FK-4 system stars were used as reference stars.
| Abundances of interstellar atoms from ultaviolet absorption lines
The equivalent widths of interstellar absorption lines of Mg II, P II,Cl I and II, Mn II, Fe II, Cu II, and Ni II, obtained in a Copernicussurvey of Bohlin et al (1983) have been analyzed to yield columndensities along the lines of sight. The measured depletions are clearlycorrelated with nH, the mean hydrogen column density alongthe line of sight. Depletions also seem to be weakly correlated withvarious ratios of hydrogen to extinction by dust grains and alsovariations of extinction with wavelength, although part of these effectsare a secondary result of the correlation with nH. Theapparent coupling of depletion to the mean density are interpreted interms of an idealized model due to Spitzer (1985), where each elementhas one value of depletion in the low-density, warm, neutral gas and anenhanced, different value in cold clouds. The difference of apparentdepletions for Mg, P, Cl, Mn, and Fe between warm and cold cloudsaverages 0.44 + or - 0.12 (rms) dex, and, after an allowance forobservational errors is made, the scatter of individual depletions fromthe overall trend predicted by method is only about 0.10 dex. Theidentification of the observed apparent depletions with actual ones,while very likely, is not entirely secure, because of the possiblepresence of highly saturated compoents with very narrow profiles and thepossible contamination of the results by H II regions.
| Visual multiples. VIII - 1000 MK types
A total of 1000 new classifications are given for stars brighter than B= 8.0 mag in the Aitken double star catalog. The classificationssupplement 865 classifications obtained in 1981 and 1984. Among thenewly discovered stars are 12 new Ap stars, eight Lambda Bootis stars,one Ba II star, and 60 Am stars. A detailed list of the newclassifications is given.
| Non-LTE analysis of carbon lines in the spectra of hot stars
Not Available
| Photographic Measures of Visual Double Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1983A&AS...51...63P&db_key=AST
|
Új cikk hozzáadása
Kapcsolódó hivatkozások
- - (nincs kapcsolódó hivatkozás) -
Új link hozzáadása
Besorolás csoportokba:
|
Pozíciós és asztrometriai adatok
| Csillagkép: | Cefeusz |
| Rektaszcenzió: | 22h20m57.68s |
| Deklináció: | +66°57'54.5" |
| Vizuális fényesség: | 7.346 |
| Távolság: | 107.411 parszek |
| RA sajátmozgás: | 43.1 |
| Dec sajátmozgás: | 21 |
| B-T magnitude: | 7.636 |
| V-T magnitude: | 7.37 |
Katalógusok és elnevezések:
|
