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| viXra.org > Astrophysics > 2305 |
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[9] viXra:2305.0170 [pdf] replaced on 2023-07-03 09:36:29
Authors: Manuel Abarca Hernandez
Comments: 34 Pages. In V2 the Milky Way direct mass is compared successfully with results got from GAIA DR2 published in JCAP
This paper develops carefully an original theory of dark matter, whose main hypothesis is that DM is generated by the own gravitational field. This work introduces the best version of the theory physical and mathematically, which has been developed and published since 2013.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. This work has two newness: it is demonstrate that Direct mass comes from Bernoulli mass formula when it is considered an initial point belonging to the Buckingham halo curve, (ideal curve related to dynamical equilibrium), to calculate the parameter C. The second one is two astonishing calculus of masses in LG. This work begins studying the Rotation curves, from M31 and MW, published by Sofue,Y.2015 and 2020 . The 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 for DM density and for total mass, including DM.In chapters 11, 12 and 13 are calculated the parameters a for MW, M33 and LCM galaxies. In chapter 14 is calculated the mass of MW and M31 at 770 kpc (4,97E+12 Msun) that match with current value 5E+12 Msun and the total mass of L.G. at 3 Mpc ( 9,8E+12 Msun), which match with results got by the well known researchers, [17] Fattahi, Navarro.2020. In chapter 15, is shown a method to extend the theory to cluster of galaxies and chapter 16 is dedicated to show how DM is counter balanced by dark energy with negative mass.
Category: Astrophysics
[8] viXra:2305.0156 [pdf] replaced on 2023-06-02 07:48:00
Authors: Arieh Sher
Comments: 6 Pages.
I claim that the Sagnac effect cannot be explained either by special relativity or by classical theory. But, I claim that this effect can be explained by general relativity.
Category: Astrophysics
[7] viXra:2305.0141 [pdf] submitted on 2023-05-21 14:40:52
Authors: Richard A. Peters
Comments: 31 Pages.
Type Ia supernovae (SNe Ia) are crucial cosmic events used for cosmology and understanding the universe's expansion. However, the precise progenitor systems and explosion mechanisms behind SNe Ia remain elusive and subject to ongoing research. This abstract critically assesses the limitations of current progenitor models employed to explain these intriguing stellar explosions. The Single Degenerate Model, involving the accretion of matter onto a white dwarf from a non-degenerate companion star, faces challenges in explaining the observed lack of post-explosion companion stars, known as the "Missing Companion Problem." The Double Degenerate Model, based on the merger of two white dwarfs, lacks a definitive understanding of the exact merger mechanisms and the parameter space for successful explosions. These limitations highlight the need for further theoretical advancements, observational constraints, and computational modeling to refine and expand our understanding of the progenitor systems of Type Ia supernovae. Future investigations will aim to identify the dominant pathways leading to Type Ia explosions, reconcile the inconsistencies among different models, and enhance the accuracy of SNe Ia as cosmological distance indicators.The whole idea of this paper is to show that the white dwarf progenitor of a Type Ia supernova contains a significant portion of dark matter that is attracted to the dwarf until the Chandrasekhar limit of the star is reached. In this model there is no need for a companion star to provide the extra mass needed to exceed the Chandrasekhar limit of the white dwarf.
Category: Astrophysics
[6] viXra:2305.0105 [pdf] submitted on 2023-05-13 09:30:17
Authors: Herbert Weidner
Comments: 5 Pages.
After compensation for phase modulation and frequency drift, the pulsar's GW can be detected in the records of the interferometer Livingston. The signatures agree with the known values measured with electromagnetic waves. The measured amplitude modulation of the GW in the daily rhythm shows the directivity of the antenna.
Category: Astrophysics
[5] viXra:2305.0103 [pdf] submitted on 2023-05-14 03:29:18
Authors: Richard A. Peters
Comments: 53 Pages.
"The Greatest Optical Telescopes on Earth and Beyond" is a brief overview of the most impressive optical telescopes in existence, both on Earth and beyond. This abstract provides a glimpse into the contents of the article. The article explores the most advanced optical telescopes currently in use on Earth, including the Keck Observatory in Hawaii, the Very Large Telescope (VLT) in Chile, and the Hubble Space Telescope in orbit around Earth. The technical capabilities of each elescope are discussed, highlighting their unique strengths and contributions to the field of astronomy. In addition to Earth-based telescopes, the article also delves into the realm of space-based telescopes, including the aforementioned Hubble, as well as the James Webb Space Telescope (JWST). The article explores the innovative technology used in the design and construction of these telescopes and their expected impact on the field of astronomy. Overall, "The Greatest Optical Telescopes on Earth and Beyond" offers a glimpse into the incredible technology and engineering feats behind the world's most powerful telescopes, and the exciting discoveries they enable in the field of astronomy.
Category: Astrophysics
[4] viXra:2305.0096 [pdf] submitted on 2023-05-12 16:22:19
Authors: Herbert Weidner
Comments: 9 Pages.
After compensation for phase modulation and frequency drift, the pulsar's GW can be detected in the records of all three interferometers. The signatures agree with the known values measured with electromagnetic waves.
Category: Astrophysics
[3] viXra:2305.0085 [pdf] submitted on 2023-05-11 01:09:50
Authors: Mario Everaldo de Souza
Comments: 2 Pages. (Correction made by viXra Admin - Please conform!)
It is shown that a galaxy inside a cosmic void close to a wall between two cosmic voids is attracted towards the wall by a Hooke's law force. It is also shown that the duration of the universal expansion is about 100 billion years.
Category: Astrophysics
[2] viXra:2305.0063 [pdf] submitted on 2023-05-08 02:56:06
Authors: Richard A. Peters
Comments: 39 Pages.
Asteroid and comet impacts and airbursts can have significant effects on the Earth's environment and can cause major changes to the planet's ecosystems and climate. The effects of these events can vary widely depending on the size and composition of the asteroid or comet: The Great Flood, the destruction of Sodom and Gomorrah, AD 536, and the Chicago and Midwester fires of 1871.The Great Flood is one of the most debated events in terms of its cause. While some scholars suggest the the flood was a purely mythological or allegorical story, others suggest that there may have been an historical basis for it. Some scientists have suggested that a major flood could have been caused by the impact of a comet or asteroid, although the evidence for this is largely speculative.The destruction of Sodom and Gomorrah is another event that has been linked to the possibility of an asteroid or comet impact. According to some interpretations of the biblical story, the cities were destroyed by 'brimstone and fire' raining down from the sky, which some researchers suggest could be consistent with as asteroid or comet impact. However, there is little physical evidence to support this hypothesis.The year AD 536 was marked by a sudden and prolonged cooling of the Earth's climate, which has been linked to a variety of possible causes, including a volcanic eruption or asteroid impact. Some researchers have suggested that an asteroid or comet impact could have caused a 'nuclear winter' effect, blocking out the sun's light and causing widespread cooling.Finally, the Chicago and Midwester fires of 1871 were caused by a combination of dry weather, strong winds and human activity, rather than as asteroid or comet impact.
Category: Astrophysics
[1] viXra:2305.0034 [pdf] submitted on 2023-05-04 22:30:24
Authors: Richard A. Peters
Comments: 13 Pages.
Globular clusters are ancient, spherical groups of stars that are found in many galaxies throughout the universe, including our own Milky Way. These clusters contain some of the oldest stars in the universe and offer important insights into the processes of star formation and galaxy evolution. Globular clusters typically contain hundreds of thousands of stars, packed tightly together in a relatively small region of space. They are gravitationally bound systems, which means that the stars are held together by their mutual gravitational attraction. The stars in a globular cluster are also very old, with ages of up to 13 billion years or more, and are mostly composed of low-mass, metal-poor stars. Despite their small size and relatively simple structure, globular clusters are complex objects that exhibit a wide range of physical and dynamical phenomena. For example, they often contain multiple populations of stars with different chemical compositions, suggesting that they may have experienced multiple episodes of star formation. They also exhibit a variety of dynamical behaviors, including mass segregation, core collapse, and the formation of binary star systems. Observations and simulations of globular clusters have provided important insights into the formation and evolution of galaxies. By studying the properties and distribution of these clusters, astronomers can learn more about the conditions under which they formed, the role they played in the early universe, and the processes that have shaped the galaxies in which they reside. Overall, globular clusters are fascinating objects that continue to offer important insights into the workings of the universe.
Category: Astrophysics
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