Use is made from the data from the Gaia satellite of 2013, which measured the rotation of our galactic system by parallax measurements. This implies that the rotation velocities were measured directly without applying the Doppler effect. The results from Gaia allow for a new understanding of flat rotation curves of galactic systems. The study uses earlier findings that the G measurements collected by CODATA show that the gravitational constant G is not a universal constant of nature, but depends on the distance to the center of a mass. At a place where G is larger, the inert mass of, for example, an electron will be larger. This leads to the concept of gravitational spectrum shift. It implies that the emitted spectrum of a star depends on its location within its galacticum. A different spectrum means a different redshift and that implies that the Doppler method for measuring the rotational velocities of stars generally provides wrong data. From available literature the Milky Way rotation curves for conditions with low as well as high accelerations are considered. The two different cases are the nearby solar region and a region far away from the galactic center. Within the solar region all spectra originate with the same G value as near the Sun, and therefore the Doppler method can safely be used. This is different for the case far away from the galactic center, where the impact of the center of mass of the Milky Way on G is small. The conclusions, which have been obtained by analyzing available data, lead to flat rotation curves with a Keplerian decline without introducing dark matter.
| Published in | American Journal of Modern Physics (Volume 13, Issue 4) |
| DOI | 10.11648/j.ajmp.20241304.11 |
| Page(s) | 52-56 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Gravity, Galactic Rotation Curves, Doppler Effect, Gravitational Constant, Kepler
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APA Style
Colenbrander, B., Hulscher, W. (2024). Keplerian Rotation Curve of the Milky Way. American Journal of Modern Physics, 13(4), 52-56. https://doi.org/10.11648/j.ajmp.20241304.11
ACS Style
Colenbrander, B.; Hulscher, W. Keplerian Rotation Curve of the Milky Way. Am. J. Mod. Phys. 2024, 13(4), 52-56. doi: 10.11648/j.ajmp.20241304.11
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Download@article{10.11648/j.ajmp.20241304.11,
author = {Bernard Colenbrander and Willem Hulscher},
title = {Keplerian Rotation Curve of the Milky Way
},
journal = {American Journal of Modern Physics},
volume = {13},
number = {4},
pages = {52-56},
doi = {10.11648/j.ajmp.20241304.11},
url = {https://doi.org/10.11648/j.ajmp.20241304.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmp.20241304.11},
abstract = {Use is made from the data from the Gaia satellite of 2013, which measured the rotation of our galactic system by parallax measurements. This implies that the rotation velocities were measured directly without applying the Doppler effect. The results from Gaia allow for a new understanding of flat rotation curves of galactic systems. The study uses earlier findings that the G measurements collected by CODATA show that the gravitational constant G is not a universal constant of nature, but depends on the distance to the center of a mass. At a place where G is larger, the inert mass of, for example, an electron will be larger. This leads to the concept of gravitational spectrum shift. It implies that the emitted spectrum of a star depends on its location within its galacticum. A different spectrum means a different redshift and that implies that the Doppler method for measuring the rotational velocities of stars generally provides wrong data. From available literature the Milky Way rotation curves for conditions with low as well as high accelerations are considered. The two different cases are the nearby solar region and a region far away from the galactic center. Within the solar region all spectra originate with the same G value as near the Sun, and therefore the Doppler method can safely be used. This is different for the case far away from the galactic center, where the impact of the center of mass of the Milky Way on G is small. The conclusions, which have been obtained by analyzing available data, lead to flat rotation curves with a Keplerian decline without introducing dark matter.
},
year = {2024}
}
TY - JOUR T1 - Keplerian Rotation Curve of the Milky Way AU - Bernard Colenbrander AU - Willem Hulscher Y1 - 2024/09/23 PY - 2024 N1 - https://doi.org/10.11648/j.ajmp.20241304.11 DO - 10.11648/j.ajmp.20241304.11 T2 - American Journal of Modern Physics JF - American Journal of Modern Physics JO - American Journal of Modern Physics SP - 52 EP - 56 PB - Science Publishing Group SN - 2326-8891 UR - https://doi.org/10.11648/j.ajmp.20241304.11 AB - Use is made from the data from the Gaia satellite of 2013, which measured the rotation of our galactic system by parallax measurements. This implies that the rotation velocities were measured directly without applying the Doppler effect. The results from Gaia allow for a new understanding of flat rotation curves of galactic systems. The study uses earlier findings that the G measurements collected by CODATA show that the gravitational constant G is not a universal constant of nature, but depends on the distance to the center of a mass. At a place where G is larger, the inert mass of, for example, an electron will be larger. This leads to the concept of gravitational spectrum shift. It implies that the emitted spectrum of a star depends on its location within its galacticum. A different spectrum means a different redshift and that implies that the Doppler method for measuring the rotational velocities of stars generally provides wrong data. From available literature the Milky Way rotation curves for conditions with low as well as high accelerations are considered. The two different cases are the nearby solar region and a region far away from the galactic center. Within the solar region all spectra originate with the same G value as near the Sun, and therefore the Doppler method can safely be used. This is different for the case far away from the galactic center, where the impact of the center of mass of the Milky Way on G is small. The conclusions, which have been obtained by analyzing available data, lead to flat rotation curves with a Keplerian decline without introducing dark matter. VL - 13 IS - 4 ER -
Department of Solid State Physics, AMOLF Institute, Amsterdam, The Netherlands
Faculty of Electrical Engineering, University of Twente, Enschede, The Netherlands
