Contents
Images
Upload your image
DSS Images Other Images
Related articles
U, V, W velocity components for the old disk using radial velocities of 1295 stars in the three cardinal Galactic directions
New radial velocities are presented for 1295 stars chosen at random nearthe three cardinal Galactic directions of l = 180 deg, b = 0; l = 90deg, b = 0 deg; and b = 90 deg, giving the distribution in U, V, and W,respectively, from the radial velocities alone. The measurements weremade with the coude spectrograph of the Mount Wilson 100 in. Hookerreflector. The purpose of the program is to set limits on the densitynormalization in the solar neighborhood of the old thin disk, the oldthick disk, and the halo. Many more high-velocity stars are present inthe unbiased sample than expected from previous estimates of thenormalization. The data suggest the density ratios in the solarneighborhood to be about 90 percent, 10 percent, and about 0.5 percentfor the thin disk, thick disk, and halo populations, respectively.
|
Submit a new article
Related links
Submit a new link
Member of following groups:
|
Observation and Astrometry data
| Constellation: | おうし座 |
| Right ascension: | 05h40m14.03s |
| Declination: | +21°17'09.6" |
| Apparent magnitude: | 8.574 |
| Distance: | 740.741 parsecs |
| Proper motion RA: | -12.9 |
| Proper motion Dec: | -11.3 |
| B-T magnitude: | 9.041 |
| V-T magnitude: | 8.613 |
Catalogs and designations:
|
