Radial velocities of late-type stars in the galactic center

Details Radial velocities of late-type stars in the galactic center Radial velocities of late-type stars in the galactic center

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...317..881s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 15, 1987, p. 881-891.

Other

89

Galactic Nuclei, Infrared Spectra, Late Stars, Milky Way Galaxy, Radial Velocity, Stellar Spectrophotometry, Interstellar Extinction, Mass Distribution, Supergiant Stars

Scientific paper

The 2.0-2.4 micron spectra, with 120 km/s resolution, obtained for six late-type stars within 2 pc of the center of the Galaxy were used to derive spectral types and reddenings for these stars. The supergiant density in the Galactic center is lower than in previous determinations. The radial velocities of the Galactic center stars are measured to an uncertainty of 10 km/s using a cross-correlation technique. No correspondence is found between the stellar velocities and the Ne II velocities or other gas velocities observed along the same line of sight. No systematic rotation or ordered motion is seen in the stellar velocity distribution. The total mass distribution derived from the stellar velocity dispersion is compared to the stellar mass distribution derived from the 2 micron light and the total mass distribution derived from gas velocities.

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