Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
A catalogue of eclipsing variables
A new catalogue of 6330 eclipsing variable stars is presented. Thecatalogue was developed from the General Catalogue of Variable Stars(GCVS) and its textual remarks by including recently publishedinformation about classification of 843 systems and making correspondingcorrections of GCVS data. The catalogue1 represents thelargest list of eclipsing binaries classified from observations.
| Hipparcos red stars in the HpV_T2 and V I_C systems
For Hipparcos M, S, and C spectral type stars, we provide calibratedinstantaneous (epoch) Cousins V - I color indices using newly derivedHpV_T2 photometry. Three new sets of ground-based Cousins V I data havebeen obtained for more than 170 carbon and red M giants. These datasetsin combination with the published sources of V I photometry served toobtain the calibration curves linking Hipparcos/Tycho Hp-V_T2 with theCousins V - I index. In total, 321 carbon stars and 4464 M- and S-typestars have new V - I indices. The standard error of the mean V - I isabout 0.1 mag or better down to Hp~9 although it deteriorates rapidly atfainter magnitudes. These V - I indices can be used to verify thepublished Hipparcos V - I color indices. Thus, we have identified ahandful of new cases where, instead of the real target, a random fieldstar has been observed. A considerable fraction of the DMSA/C and DMSA/Vsolutions for red stars appear not to be warranted. Most likely suchspurious solutions may originate from usage of a heavily biased color inthe astrometric processing.Based on observations from the Hipparcos astrometric satellite operatedby the European Space Agency (ESA 1997).}\fnmsep\thanks{Table 7 is onlyavailable in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/397/997
| Observations of Hipparcos short-period red giant stars
Optical UBV(RI)C and infrared JHK photometry is presented ofa small sample of giant stars with short periods in the Hipparcoscatalogue. Observations were limited, but were sufficient to rule outmost of the Hipparcos periods. Radial velocity measurement were alsomade for a few stars, over six successive nights. Low-level variabilitywas detected in a few stars. It is argued that in most cases thebrightness variations are primarily due to temperature changes. Thesefindings show that high-overtone pulsations in M giant stars occur, ifat all, in a far more limited number of stars than proposed in theauthors' previous discussion of the Hipparcos data alone.
| The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.
| SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
| Costellazione: | Bussola |
| Ascensione retta: | 09h25m38.52s |
| Declinazione: | -27°27'05.6" |
| Magnitudine apparente: | 8.878 |
| Distanza: | 1666.667 parsec |
| Moto proprio RA: | -0.5 |
| Moto proprio Dec: | -14.7 |
| B-T magnitude: | 10.896 |
| V-T magnitude: | 9.045 |
Cataloghi e designazioni:
|
