Luminosity and motion of large proper motion stars. II - Stars with annual proper motion larger than 0.7 arc seconds

Details Luminosity and motion of large proper motion stars. II - Stars with annual proper motion larger than 0.7 arc seconds Luminosity and motion of large proper motion stars. II - Stars with annual proper motion larger than 0.7 arc seconds

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apjs...51..183e&link_type=abstract

Astrophysical Journal Supplement Series, vol. 51, Feb. 1983, p. 183-202.

Astronomy and Astrophysics

Astrophysics

34

Astronomical Catalogs, Stellar Luminosity, Stellar Motions, Radial Velocity, Stellar Magnitude, Stellar Mass, Subdwarf Stars, Tables (Data)

Scientific paper

A complete sample of proper motion stars, μ ≥ 0."7 yr-1, V ≤ 15.0 mag, and δ < +30°, is divided into two groups, disk and halo, for which luminosity functions are derived using the Schmidt ΣV-1m method. The space density of the disk stars is 125 × l0-3 pc-3 and the luminosity function is very similar to that for the general field. The space density of the halo stars is 2 × l0-3 pc-3, and the luminosity function shows an excess of faint stars. The mass density of the halo for stars fainter than MV = +4 mag is 0.75 × l0-3 Msun pc-3, which includes 0.24 × l0-3 Msun pc-3 contributed by white dwarfs. The corresponding value for the disk stars is 0.05 Msun pc-3, with 0.005 Msun pc-3 contributed by white dwarfs (0.5 Msun each). The halo stars then represent 1.5% of the local stellar mass density. The reddest dwarfs and subdwarfs are briefly discussed, and several that would repay detailed examination are isolated.

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