Kinematics and properties of F stars near the North Galactic Pole. II - The isothermal disc

Details Kinematics and properties of F stars near the North Galactic Pole. II - The isothermal disc Kinematics and properties of F stars near the North Galactic Pole. II - The isothermal disc

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.230..273a&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 230, Jan. 15, 1988, p. 273-320.

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9

Astronomical Coordinates, F Stars, Galactic Structure, Kinematics, Northern Sky, Stellar Models, Astronomical Photometry, Galactic Evolution, Radial Velocity, Ubv Spectra

Scientific paper

Radial velocities are given for about 550 photometrically-identified disk-population F stars lying within 15 deg of the North Galactic Pole. The overall radial and z-velocity distributions are found to be closely Gaussian, with corrected rms and mean z velocities of 11.3 + or - 0.6 and -9.5 + or - 0.5 km/s, respectively. The isothermal kinematics of the population are reflected in the constant velocity dispersion to a z distance of 400 pc. No systematic variation of either the velocity dispersion or the stellar age with the metallicity-sensitive Stromgren delta m1 index is noted over a range of ages up to 5 Gyr.

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