The distance to the Galactic center determined by G, K, and M stars

The distance from the Sun to the center of the Galaxy R 0 remains a fundamental parameter for Galactic structure. This study uses 105,275 G, K, and M stars of all luminosity classes with position, parallax, and proper motion taken from the Hipparcos catalog and radial velocities from the Wilson and...

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Bibliographic Details
Published in:Astrophysics and space science 2017-02, Vol.362 (2), p.1-6, Article 29
Main Author: Branham, Richard L.
Format: Article
Language:English
Subjects:
Algorithms
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Confidence intervals
Cosmology
Data centers
Luminosity
M stars
Mathematical models
Nonlinearity
Observations and Techniques
Original Article
Parameter estimation
Physics
Physics and Astronomy
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Stars & galaxies
Sun
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Summary:The distance from the Sun to the center of the Galaxy R 0 remains a fundamental parameter for Galactic structure. This study uses 105,275 G, K, and M stars of all luminosity classes with position, parallax, and proper motion taken from the Hipparcos catalog and radial velocities from the Wilson and Strasbourg Data Center catalogs. The nonlinear kinematical equations of condition are solved by the Nelder-Mead simplex algorithm and give R 0 = 7.64 ± 0.09 kpc . At a confidence level of 90 % one can assert the randomness of the residuals and shows that the kinematical model yields satisfactory results.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-017-3015-1