A Kinematical Study for the Galaxy Based on the Revised Hipparcos Astrometric Data

Details A Kinematical Study for the Galaxy Based on the Revised Hipparcos Astrometric Data A Kinematical Study for the Galaxy Based on the Revised Hipparcos Astrometric Data

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009acasn..50..213s&link_type=abstract

Acta Astronomica Sinica, vol. 50, no.2, p. 213-223

Astronomy and Astrophysics

Astronomy

Astrometry, Catalogs, Galaxy: Disk, Variables: Cepheid, Galaxy: Structure

Scientific paper

On the basis of the revised Hipparcos data recently released, the zero-point of the PL relation for classical cepheids was reexamined. Fitting proper motion and radial velocity data via an axis symmetric model, Oort constants and circular rotation velocity of the LSR were calculated to obtain Galactocentric distance of the sun, R0 = 8.0±0.8 kpc. From the rotation curve in solar neighborhood, the existence of weak ellipticity of the Galactic potential was found. Adopting a simple asymmetric model, we obtained the ellipticity ɛ (R0) = 0.067±0.036 at the sun, while the minor axis pointing to φb = 320 + 150.

Affiliated with

Also associated with

No associations

Rating

A Kinematical Study for the Galaxy Based on the Revised Hipparcos Astrometric Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Kinematical Study for the Galaxy Based on the Revised Hipparcos Astrometric Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Kinematical Study for the Galaxy Based on the Revised Hipparcos Astrometric Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1860760