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The distribution of low-mass stars in the Galactic disc
The complex interdependence of stellar binarity, the stellarmass-luminosity relation, the mass function, the color-magnituderelation, and Galactic disk structure is quantified. A mass-M(V)relation and a model for the change of stellar luminosity with changesin chemical abundance and age are derived. A combination of this withdetailed modeling of all astrophysical and observational contributionsto the Malmquist scatter makes it possible to model star-count datawithout approximating Malmquist corrections. It is shown that a singlemass function and normalization explain the stellar distribution towardsboth Galactic poles, as well as the distribution of stars within adistance of 5.2 pc of the sun.
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Observation and Astrometry data
| Constellation: | Ζυγός |
| Right ascension: | 15h25m40.51s |
| Declination: | -12°52'14.7" |
| Apparent magnitude: | 8.786 |
| Distance: | 248.756 parsecs |
| Proper motion RA: | -22.4 |
| Proper motion Dec: | -28.1 |
| B-T magnitude: | 8.982 |
| V-T magnitude: | 8.803 |
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