Modeling the rotation curve of the plane subsystem and determination of the distance to the Galactic center: Analysis of data for gas complexes

Details Modeling the rotation curve of the plane subsystem and determination of the distance to the Galactic center: Analysis of data for gas complexes Modeling the rotation curve of the plane subsystem and determination of the distance to the Galactic center: Analysis of data for gas complexes

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43..345n&link_type=abstract

Astronomy Reports, Volume 43, Issue 6, June 1999, pp.345-360

Astronomy and Astrophysics

Astronomy

2

Scientific paper

A technique for constructing optimally smooth model rotation curves has been applied to complexes of HII regions and molecular clouds, yielding a Galactocentric distance of R_0 = 8.3 +/- 0.8 kpc. The residual motion of the Local Standard of Rest with respect to these objects is 3.4 +/- 1.3 km s^-1 in the direction of the Galactic anticenter and 4.1 +/- 2.1 km s^-1 in the direction of the Galactic rotation. Ignoring the azimuthal component of this motion results in substantial underestimation of R_0. Data on the rotation of neutral-hydrogen and HII-region subsystems and the derived value of R_0 are used to estimate the Oort constant A = 16.2 +/- 0.6 km s^-1 kpc^-1 and the parameter AR_0 = 135 +/- 5 km s^-1. Analysis of a combined sample of molecular clouds associated with HII regions or reflection nebulae reveals a clear difference between the R_0 values inferred from data for northern (l < 180deg) and southern (l > 180deg) objects, similar to the known difference for OB stars.

Affiliated with

Also associated with

No associations

Rating

Modeling the rotation curve of the plane subsystem and determination of the distance to the Galactic center: Analysis of data for gas complexes 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 Modeling the rotation curve of the plane subsystem and determination of the distance to the Galactic center: Analysis of data for gas complexes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling the rotation curve of the plane subsystem and determination of the distance to the Galactic center: Analysis of data for gas complexes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1497924