Refining the Oort and Galactic constants

@article{Olling1998RefiningTO,
  title={Refining the Oort and Galactic constants},
  author={R. Olling and M. Merrifield},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={1998},
  volume={297},
  pages={943-952}
}
The local stellar kinematics of the Milky Way offer a useful tool for studying the rotation curve of the Galaxy. These kinematics — usually parametrized by the Oort constants AB— depend on the local gradient of the rotation curve as well as its absolute value (Θ0), and the Sun's distance to the Galactic Centre (R0). The density of interstellar gas in the Milky Way is shown to vary non-monotonically with radius, and so contributes significantly to the local gradient of the rotation curve. We… Expand

Figures and Tables from this paper

The galactic constants and rotation curve from molecular-gas observations
We obtained the photometric distances and radial velocities for the molecular gas for 270 star-forming regions and estimated the distance to the Galactic center from ten tangent points to be R0 =Expand
Rotation Curve of the Milky Way out to ~200 kpc
The rotation curve (RC) of our Galaxy, the Milky Way, is constructed starting from its very inner regions (few hundred parsecs) out to a large galactocentric distance of ~200 kpc using kinematicalExpand
Kinematics and stellar content of the Milky Way populations toward the North Galactic Pole
Aims. The formation and evolution of galaxies is one of the forefront problems of Astrophysics. Detailed studies of our own Galaxy are the first step to understand these complex processes. In thisExpand
Milky Way Mass Models and MOND
Using the Tuorla-Heidelberg model for the mass distribution of the Milky Way, I determine the rotation curve predicted by MOND (modified Newtonian dynamics). The result is in good agreement with theExpand
On the Shoulders of Giants: Properties of the Stellar Halo and the Milky Way Mass Distribution
Halo stars orbit within the potential of the Milky Way, and hence their kinematics can be used to understand the underlying mass distribution. However, the inferred mass distribution dependsExpand
Inversion of stellar statistics equation for the Galactic bulge
A method based on Lucy (1974) iterative algorithm is developed to invert the equation of stellar statistics for the Galactic bulge and is then applied to the K-band star counts from the Two-MicronExpand
The Oort constants measured from proper motions
The Oort constants describe the local spatial variations of the stellar streaming field. The classic way for their determination employs their effect on stellar proper motions. We discuss variousExpand
Star-forming complexes and the spiral structure of our Galaxy
We have carried out a multiwavelength study of the plane of our Galaxy in order to establish a star-forming-complex catalogue which is as complete as possible. Features observed include H, H109, CO,Expand
KINEMATICS OF THE STELLAR HALO AND THE MASS DISTRIBUTION OF THE MILKY WAY USING BLUE HORIZONTAL BRANCH STARS
Here we present a kinematic study of the Galactic halo out to a radius of ∼ 60 kpc, using 4664 blue horizontal branch (BHB) stars selected from the SDSS/SEGUE survey, to determine key dynamicalExpand
Luminous and dark matter in the Milky Way
Axisymmetric models of the Milky Way exhibit strong interrelations between the Galactic constants [the Sun's distance to the Galactic Centre (R0), and the local rotation speed (θ0)], the localExpand
...
1
2
3
4
5
...

References

SHOWING 1-5 OF 5 REFERENCES
Galactic and Extragalactic Radio Astronomy
An ulrasonic liquid level measurement device is used to measure the depth of a flowing liquid in a channel using an ultrasonic transducer that is positioned out of contact with the liquid and aboveExpand
Refining the Oort and Galactic constants
  • 1988
Phil. Trans. R. Soc. Lond. A
  • Phil. Trans. R. Soc. Lond. A
  • 1986
Symposium', Published by ESA as ESA-SP 402
  • Symposium', Published by ESA as ESA-SP 402
  • 1984