Astrophysics

Comment [on] A Solution to the Pioneer Anomalous Annual and Diurnal Residuals}} by E. D. Greaves, et al. in Progress in Physics, 17(2): p168]

Authors: John Hodge
Comments: 2 Pages.

A comparison is made between Greaves, E. D., Bracho, C., Gift, S., and Rodrigues, A. N., 2021. A Solution to the Pioneer Anomalous Annual and Diurnal Residuals, Progress in Physics, vol. 17, 2, p. 168. and Hodge, J. C. 2006. Scalar potential model of the Pioneer Anomaly.arXiv: astro-ph/0612567v1. Both papers suggest the Pioneer Anomaly observation is due to the signal being modified by a characteristic of space that is influenced by the Sun and Earth. The papers differ by what that characteristic is and how it influences the signal. The former paper uses "energy density" (a scalar) which is proportional to distance (r^−4) from bodies. All thecharacteristics of the former paper were accounted in the original calculation of the Pioneer Anomaly. The latter paper used a vector proportional to r^−2, a gravitational force exerted on photons that was not accounted. The different treatment of r by the latter provides a more accurate treatment of the periodicities and all 10 anomalous characteristics of the Pioneer Anomaly. The conclusions of the former that the velocity of light is Galilean additive and the use of the "gravitational density" are not supported.
Category: Astrophysics

Messung Der Gravitationswellen Des Krebspulsars (2) in Den Ligo and Virgo O3b Daten
Measurement of the Gravitational Waves of the Crab Pulsar (2) in the Ligo and Virgo O3b Data

Authors: Herbert Weidner
Comments: 9 Pages. In German

Nach Kompensation von Phasenmodulation und Frequenzdrift kann das GW des Pulsars in den Aufzeichnungen aller drei Interferometer nachgewiesen werden. Die Signaturen stimmen mit den bekannten Werten überein, die mit elektromagnetischen Wellen gemessenen wurden. (mit Ergänzungen)

After compensation for phase modulation and frequency drift, the pulsar's GW can be detected in the recordings of all three interferometers. The signatures agree with the known values u200bu200bmeasured with electromagnetic waves. (with additions)
Category: Astrophysics

A Dark Matter Theory by Gravitation Got in M31 and Milky Way

Authors: Manuel Abarca Hernandez
Comments: 32 Pages.

In this paper is developed carefully an original theory of dark matter, whose main hypothesis is that DM is generated by the own gravitational field. In this work is introduced the best version of the theory physical and mathematically, previously published since 2014. The hypothesis of DM by gravitation has two main consequences: the first one is that the law of DM generation has to be the same, in the halo region, for all the galaxies and the second one is that the haloes are unlimited so the total DM goes up without limit. Both properties are crucial for the success of this theory. Apparently the hypothesis of unlimited haloes would seem impossible but further cosmological studies may demonstrate that dark energy may counter balance the growing of DM. This paper is similar to one previous paper published in 2019, although there is an important newness, which is the new rotation curve of Milky Way published by Sofue,Y. in 2020. Results got with this new data in Milky Way back strongly the rightness of DM by gravitation theory. This work begins studying the Rotation curves data come from Sofue,Y.2015 for M31 galaxy and from Sofue 2020 for Milky Way. Thanks these remarkable rotation curves, both regression curves at halo region are fitted with power regression functions whose exponents are the same for both galaxies. By the fitted function is possible to calculate a dark matter density function depending on radius which is transformed into a DM density depending on gravitational field. This change is the core of the theory because at such moment it is possible to study the formula of dark matter density by the Buckingham theorem in order to change the statistical calculus by physical formulas which depend on the Universal constants G, h and c. From now on the statistical theory becomes a perfect physical theory that despite it is based on the Newtonian framework allows to get new formulas such as DM density and total DM mass. In chapters 10 ,11 and 12 are calculated masses for M31, Milky Way and M33 with excellent results. But it is in the chapter 13 where are calculated the most brilliant results got in this work. (Truncated by viXra Admin to < 400 words)
Category: Astrophysics

Systematic Byass in Celestial Mechanics

Authors: Jose J. Astorkia
Comments: 6 Pages. In Spanish

An eigenexperiment shows systematic byass in celestial mechanics calculations when velocity is greater than escape velocity. Evidences and consequences are presented. In spanish languaje. Un análisis de un caso particular muestra la presencia de errores sistemáticos en los cálculos de la mecánica celeste en determinados casos. Se presentan evidencias observacionales y se hace una valoración de sus consecuencias.
Category: Astrophysics

An Alternative Theory of Black Holes

Authors: Kay Zum Felde
Comments: 2 Pages.

We are critisizing the conventional theories of Black Holes.
Category: Astrophysics

Webb Scores Ringed World with an Image of Uranus and a Halo Enveloping the Planet

Authors: Uri Lachish
Comments: 1 Page.

A halo, observed in Uranus image captured with NASA’s James Webb Space Telescope, indicates a layer of icy crystallites enveloping the planet.
Category: Astrophysics