내용
사진
사진 업로드
DSS Images Other Images
관련 글
Pulkovo compilation of radial velocities for 35495 stars in a common system.
Not Available
| Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.
| Intermediate band, H-beta, and RI photometry of a large sample of stars unbiased with respect to their motion. I - The F-type stars
Intermediate band and H-beta data from a sample of 1000 stars earlierthan type G2 are presented and discussed relative to the stars'luminosities, metal abundances, and motion. Two groups of stars areconsidered, one within 10 arcsec of the South Galactic Pole and 8.5-8.6mag stars contained in the Moore-Paddock (1950) and Wayman (1960)samples (MP-W). The MP-W stars are mainly old disk population stars withmetal abundances of 4-0.25 solar values. Possible age-abundancedistribution-luminosity connections are explored, as are techniques forseparating old and young disk population objects.
| Optical eclipses and precession effects in the X-ray binary system HD 77581=4U 0900-40
Results of an analysis of multiyear series of photometric observationsof the X-ray binary system HD 77581 are presented. It is shown that thesystem is an eclipsing variable in the optical range and displaysregular long-period variability in the shape and amplitude of theoptical light curves with a period of 93.3 days, which may be connectedwith phenomena in the system. It is also shown that the amplitude of theellipsoidality effect of the visible star is about 0.04 mag in the HD77581 system, with the total amplitude of optical variability reaching0.09 mag. The eclipses are caused by gas streams and by the accretionstructure, whose orientation in the binary system varies with theprecession period of the visible star. The relatively small amplitude ofthe ellipsoidality effect corresponds to the incomplete filling of itsRoche lobe by the visible star. The mass of the neutron star isestimated at 1.6 + or - 0.3 solar masses.
| Polarization measurements of 313 nearby stars
The linear polarization of 313 low galactic latitude stars has beenmeasured. With few exceptions all program stars have a spectral typelater than B9 and are within 600 parsec of the sun. 181 stars aresituated at the southern sky and 132 at the northern sky.
| Photoelectric observations of HD 77581
Abstract image available at:http://adsabs.harvard.edu/abs/1974PASP...86..317V
|
새 글 등록
관련 링크
새 링크 등록
다음 그룹에 속해있음:
|
관측 및 측정 데이터
천체목록:
|
