Showing posts with label Black holes. Show all posts
Showing posts with label Black holes. Show all posts

Friday, 6 October 2023

Physics of Anisotropic Compact Star Models with Observational Data | Chapter 1 | Current Perspective to Physical Science Research Vol. 2

 The anisotropic component for examining dense objects like unfamiliar stars, compact objects, etc. has become different in Astrophysics. This chapter aims to resolve the physical management of some anisotropic compact star models in the back- ground of a core dark energy field. Next, we acquire the equatings of motion with the magnetic field of currents and modified Chaplygin vapor in f(T) gravity. Then corresponding conditions have been emphasize to discuss anisotropic management, stability of strength conditions, security analysis with adiabatic index, bulk, compactness, and surface redshift. It still observes the maximum energy mass and radial pressure principles for different compact stars. Finally, it is equated with the practical data in cases of differing types of compact stars.

Author(s) Details:

Pameli Saha,
Department of Mathematics, Brainware University, Barasat, Kolkata-700125, India.

Ujjal Debnath,
Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah-711103, India.

Please see the link here: https://stm.bookpi.org/CPPSR-V2/article/view/12047

Tuesday, 21 June 2022

Quasinormal Modes and Thermodynamics of Linearly Charged BTZ Black Holes in Massive Gravity in (Anti) de Sitter Space-time: Scientific Explanation | Chapter 8 | New Trends in Physical Science Research Vol.5

 Under this study, we look at the thermodynamics and Quasi-Normal Modes (QNMs) of linearly charged BTZ black holes in large gravity in the (Anti)de Sitter ((A)dS) space-time. The behaviour of QNMs is seen to vary with the graviton's massive parameter as well as the black hole's charge. The thermodynamics of such black holes are also investigated in depth in the (A)dS space-time. For such black holes, the behaviour of specific heat with temperature shows a phase transition that is reliant on the graviton's massive parameter as well as the black hole's charge.


Author(s) Details:

P. Prasia,
Department of Physics, Cochin University of Science and Technology, Kochi 682022, India.

V. C. Kuriakose,
Department of Physics, Cochin University of Science and Technology, Kochi 682022, India.

Please see the link here: https://stm.bookpi.org/NTPSR-V5/article/view/7164

Sunday, 31 October 2021

Out of Time - Predicting the Science of Future Centuries and Millennia (Edition 2) | Book Publisher International

The universe is boundless and eternal, according to this text, but it was scientifically constructed. This contradiction of generating eternity is contingent on future humanity's superior electronics. Time travel, as well as programmes that employ "imaginary" time and infinite numbers like pi, will be developed by those humans. They'll also take on the names El and Elohim (names used by various religions to mean God or the gods). "Many faiths teach that it is the purpose of mankind to become gods," astronomer Carl Sagan stated in "Pale Blue Dot." (Though Elohim's unlimited talents are basically natural effects of progress, I believe they would be classified as supernatural today.)

If you look through the book, you'll see that several ideas are repeated several times. This is because each article is written in such a way that it may be understood without having read the others... As a result, the same concepts appear in multiple places. I've tried to avoid using jargon or equations unless they're absolutely required (I find that they often make a subject harder to understand, not easier). All objects and events on Earth, in space, and in time (including the inevitability of world peace and immortality) are simply strings of binary digits 1 and 0 in electronics.

Author(s) Details

Rodney Bartlett
21 Lane St., Stanthorpe, Qld. 4380, Australia.

View Book:-
https://stm.bookpi.org/OTPSFCM/article/view/4229

Friday, 2 April 2021

An Advanced Study on the Creation of Neutron Stars and Black Stars and How the Chandrasekhar Limit Prevents the Creation of Intermediate Black Stars | Chapter 5 | New Insights into Physical Science Vol. 12

 A supernova remnant with a mass between 1.44 and 2.2 solar masses contracts down to a neutron star, according to a programme written in Excel. The declining gravitational potential slows time during the collapse. The pressure rises to the point that the contraction comes to a halt. Although the remnant is still contracting at greater than 2.2 solar masses, the gravitational potential causes time to relativistically freeze at the core, preventing the contraction until the pressure increases sufficiently to stop it, as it did in a neutron star. This also stops the flow of knowledge about the gravitational potential decline, so the frozen parts stay frozen and don't contract any more, becoming hypothetical. Additional matter physically and relatively contracts on top of the frozen core, and the radius of the freeze point goes out. If the freeze made it all the way to the surface, it would be a black hole with a Schwarzschild radius, but it doesn't quite make it. The field isn't absolutely frozen. Even if these "almost black holes" lack an event horizon, they are nearly as small as the Schwarzschild radius and are difficult to see due to gravitational red change. There has been the formation of a black star. As a white dwarf with a mass greater than the Chandrasekhar limit of 1.44 solar masses contracts, the inner core is compressed to a density of more than 1x109 kg/m3 due to the high pressure and gravity. It would have a minimum density of 3.5 x 1015 kg/m3 near the surface after cooling and collapsing into a neutron star. This article discusses how these two densities apply to why supernova-created stellar black stars have a mass of less than 15 solar masses and supermassive black stars have a mass of more than 50,000 solar masses. The traditional black hole model is incapable of extracting such constraints, but the black star model has exposed them, as well as many others. Between the largest SBS and the smallest SMBS, a distance of missing black stars was discovered using this model. This has to do with the density difference that occurs as pressure compresses unstable matter from degenerate white dwarf matter to neutron matter.

Author (s) Details

P. David Clark
612 N Sandpiper, Ingleside on the Bay, Texas 78362, USA.

View Book :- https://stm.bookpi.org/NIPS-V12/article/view/283