Classification of Population II supergiants and related stars in the Vilnius system

Bartkevicius, A.; Lazauskaite, R.; Tautvaisiene, G.

doi:10.1515/astro-1992-0209

Cited by 4 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of comparison are presented in Table 4. The most significant difference is found between the present metallicities and the values from Bartkevicius & Tautvaisiene (1987). The reason of such large difference is a correction of -0.23 dex which was introduced wrongfully in the latter paper.…”

Section: Comparison With Previous Resultscontrasting

confidence: 55%

“…26 yr -1 ) stars are giants or subgiants. Bartkevicius & Tautvaisiene (1987) have made a three-dimensional classification of 78 known metal-deficient giants. Bartasiute (1989) has presented the results of classification of 343 stars in an area of 900 square degrees near the South Galactic Pole.…”

Section: Previous Results Of Classificationmentioning

confidence: 99%

“…From a comparison of the observational HR diagram with isochrones, an age of 10-12 Gyr was obtained for these stars. Tautvaisiene (1987) also has calculated T e and log g for 110 metal-deficient giants from color indices in the Vilnius system and compared T e , log g plots with evolutionary tracks and isochrones. have classified in the Vilnius system 117 known and suspected Population II supergiants and related stars.…”

Section: Previous Results Of Classificationmentioning

confidence: 99%

“…We have made an analysis of the differences between the astrophysical parameters derived using the new calibrations and those estimated earlier in the Vilnius photometric system (Bartkevicius & Sperauskas 1983, Bartkevicius & Tautvaisiene 1987, Bartasiute 1989. The results of comparison are presented in Table 4.…”

Section: Comparison With Previous Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Classification of Population II Stars in the Vilnius Photometric System. II. Results

Bartkevicius¹,

Lazauskaite²

1997

Open Astronomy

View full text Add to dashboard Cite

Abstract.The results of photometric classification of 848 true and suspected Population II stars, some of which were found to belong to Population I, are presented. The stars were classified using a new calibration described in Paper I (Bartkevicius & Lazauskaite 1996). We combine these results with our results from Paper I and discuss in greater detail the following groups of stars: UU Herculis-type stars and other high-galactic-latitude supergiants, field red horizontal-branch stars, metal-deficient visual binaries, metaldeficient subgiants, stars from the Catalogue of Metal-deficient F-M Stars Classified Photometrically (MDPH; Bartkevicius 1993) and stars from one of the HIPPARCOS programs (Bartkevicius 1994a). It is confirmed that high galactic latitude supergiants from the Bartaya (1979) catalog are giants or even dwarfs. Some stars, identified by Rose (1985) and Tautvaisiene (1996a) as field RHB stars, appear to be ordinary giants according to our classification. Some of the visual binaries studied can be considered as physical pairs. Quite a large fraction of stars from the MDPH catalog are found to have solar metallicity. A number of new possible UU Herculis-type stars, RHB stars and metal-deficient subgiants are identified.

show abstract

Section: Comparison With Previous Resultscontrasting

confidence: 55%

Section: Previous Results Of Classificationmentioning

confidence: 99%

Section: Previous Results Of Classificationmentioning

confidence: 99%

Section: Comparison With Previous Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Classification of Population II Stars in the Vilnius Photometric System. II. Results

Bartkevicius¹,

Lazauskaite²

1997

Open Astronomy

View full text Add to dashboard Cite

show abstract

“…For all of the stars, the magnitude V and colour-index Β -V are compiled from the literature. For stars without original photoelectric UBV measurements, the colour index Β -V is reduced from the index Y -V of the Vilnius system (Bartkevicius and Lazauskaitè 1992), from the index b -y of the uvby system, from the index B2 -VI of the Geneva system or from the index 45-48 of the DDO system (Bartkevicius 1983), taking into account the metallicity and luminosity class of a star.…”

mentioning

confidence: 99%

HIPPARCOS programme for field metal-deficient F-M stars

Bartkevicius¹

1994

Open Astronomy

Self Cite

View full text Add to dashboard Cite

Abstract. The programme contains 445 subdwarfs, metal-deficient giants, RHB and CH stars. The aim of the programme is to obtain very accurate trigonometric parallaxes (±0."002-^±0."004) and proper motions (±0."002-j-±0."004/year) for these stars, to significantly improve the determination of their positions in t lie HR diagram and to calculate accurate kinematical parameters. About half of the programme stars are measured in the Vilnius photometric system. For all stars, the colour indices B-V have been compiled or reduced from other photometric systems. 100 of the programme stars have ground-based trigonometric parallaxes. The mean parallax of these stars is +0."0347, and its mean standard error is ±0."0104. The list of the programme stars is available on magnetic diskette.

show abstract

Photometric determination of the [Fe/H] ratio for the globular cluster M 92

Smriglio¹,

Dasgupta²,

Boyle

2006

A&A

View full text Add to dashboard Cite

CCD observations of the northern globular cluster M 92 were obtained in the PXYVS colors of the Vilnius photometric system. The results for 230 stars in an area centered on the cluster and for 178 stars in an area west of the cluster down to V = 17.0 mag are presented. After a brief outline of the data pathway from observations to reduction via IRAF and a discussion of the photometric errors, the [Fe/H] ratio of the globular cluster M 92 is determined by multicolor PXYVS Vilnius photometry.

show abstract

Classification of Population II supergiants and related stars in the Vilnius system

Cited by 4 publications

References 2 publications

Classification of Population II Stars in the Vilnius Photometric System. II. Results

Classification of Population II Stars in the Vilnius Photometric System. II. Results

HIPPARCOS programme for field metal-deficient F-M stars

Photometric determination of the [Fe/H] ratio for the globular cluster M 92

Contact Info

Product

Resources

About