Contents
Images
Upload your image
DSS Images Other Images
Related articles
The absolute magnitude of K0V stars from Hipparcos data using an analytical treatment of the Malmquist bias
We calculate the average absolute magnitude for Hipparcos single K0Vstars, using a theoretical curve for the distance-dependent Malmquistbias in the data. This method is shown to be well applicable to stellardata with good parallaxes and gives results in agreement with a previousstudy that used another treatment of the bias developed in extragalacticastronomy (finding the "unbiased plateau"). In particular, we point outthat such a fit, which uses stars in the biased part of the sample, maybe less vulnerable to the fluctuations in the unbiased plateau whosedefinition is also somewhat subjective. We found for K0V stars M_0=5.8,with the spread of the luminosity function being 0.3 mag. It is shownthat inclusion of Hipparcos non-single stars may underestimateM0 by about 0.05-0.1 mag. During the study it was found thatabout 20% of the sample may be mis-classified K0IV stars.
|
Submit a new article
Related links
Submit a new link
Member of following groups:
|
Observation and Astrometry data
| Constellation: | ちょうこくしつ座 |
| Right ascension: | 23h16m22.36s |
| Declination: | -33°40'22.0" |
| Apparent magnitude: | 9.531 |
| Proper motion RA: | -5.7 |
| Proper motion Dec: | -4.1 |
| B-T magnitude: | 10.991 |
| V-T magnitude: | 9.652 |
Catalogs and designations:
|
