SIMBAD references

1996A&A...314..430F - Astronomy and Astrophysics, volume 314, 430-437 (1996/10-2)

Derivation of the galactic rotation curve using space velocities.

FRINK S., FUCHS B., ROESER S. and WIELEN R.

Abstract (from CDS):

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 12kpc. 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±0.4mas/a (OB stars) and {OMEGA}0=5.4±0.5mas/a (cepheids), which is in agreement with the IAU 1985 value of {OMEGA}0=5.5mas/a. If we correct for probable rotations of the FK5 system, the corresponding angular velocities are {OMEGA}0=6.0mas/a (OB stars) and {OMEGA}0=6.2mas/a (cepheids). These values agree better with the value of {OMEGA}0=6.4mas/a derived from the VLA measurement of the proper motion of SgrA*.

Abstract Copyright:

Journal keyword(s): Galaxy: kinematics and dynamics - stars: kinematics - reference systems

CDS comments: PPM 740844, 740981 not identified

Simbad objects: 415

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