Derivation of the Galactic Rotation Curve using space velocities
| dc.creator | Frink, S. | |
| dc.creator | Fuchs, B. | |
| dc.creator | Roeser, S. | |
| dc.creator | Wielen, R. | |
| dc.date | 1996-04-23 | |
| dc.date.accessioned | 2026-07-25T20:08:30Z | |
| dc.description | We present rotation curves of the Galaxy based on the space-velocities of 197 OB stars and 144 classical cepheids, respectively, which range over a galactocentric distance interval of about 6 to 12 kpc. No significant differences between these rotation curves and rotation curves based solely on radial velocities assuming circular rotation are found. We derive an angular velocity of the LSR of Omega_0 = 5.5 +/- 0.4 mas/a (OB stars) and Omega_0 = 5.4 +/- 0.5 mas/a (cepheids), which is in agreement with the IAU 1985 value of Omega_0 = 5.5 mas/a. If we correct for probable rotations of the FK5 system, the corresponding angular velocities are Omega_0 = 6.0 mas/a (OB stars) and Omega_0 = 6.2 mas/a (cepheids). These values agree better with the value of Omega_0 = 6.4 mas/a derived from the VLA measurement of the proper motion of SgrA*. | |
| dc.description | LaTeX, 9 pages, 8 figures and l-aa.sty included, accepted for puplication in Astronomy & Astrophysics | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9604133 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9604133 | |
| dc.identifier | A&A 314 (1996) 430 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/69207 | |
| dc.subject | Astrophysics | |
| dc.title | Derivation of the Galactic Rotation Curve using space velocities | |
| dc.type | text |