Video Experimental Relacionado
Updated: May 6, 2026
07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 16, 2013
8.2K
Formación directa de agujeros negros supermasivos a través de flujos de entrada de gas a escala múltiple en fusiones
L Mayer1, S Kazantzidis, A Escala
1Institute for Theoretical Physics, University of Zürich, 190 Winterthurestrasse, Zürich 8057, Switzerland. lmayer@physik.unizh.ch
Nature
|August 27, 2010
Resumen
Las fusiones de protogalaxias masivas pueden formar naturalmente agujeros negros supermasivos. Estas fusiones crean las condiciones para el colapso directo del gas, evitando la necesidad de la formación de estrellas suprimida, lo que permite un rápido crecimiento del agujero negro.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Cosmología Cosmología.
- Formación de agujero negro.
Sus antecedentes:
- Los agujeros negros supermasivos (SBH) de miles de millones de masas solares existieron al principio del universo, menos de mil millones de años después del Big Bang.
- Los modelos anteriores que involucraban el colapso de estrellas primordiales o el colapso directo en protogalaxias aisladas lucharon para explicar la rápida formación y crecimiento de estos primeros SBH debido a una ineficiente acreción de gas o estrictos requisitos ambientales.
Objetivo del estudio:
- Para investigar un nuevo mecanismo para la rápida formación de agujeros negros supermasivos.
- Para determinar si las fusiones protogalácticas pueden facilitar naturalmente el colapso directo en agujeros negros masivos sin requerir enfriamiento suprimido o formación de estrellas.
Principales métodos:
- Simulaciones numéricas de la fusión de protogalaxias masivas.
- Análisis de la dinámica de los gases, las tasas de acreción y el colapso gravitacional dentro de los discos de gas nuclear impulsados por la fusión.
Principales resultados:
- Las fusiones protogalácticas crean naturalmente discos inestables y masivos de gas nuclear.
- Estos discos canalizan eficientemente grandes cantidades de gas (más de 10^8 masas solares) a escalas subparsec en un plazo de 100.000 años.
- Esta rápida concentración de gas desencadena el colapso gravitacional, formando una semilla masiva de agujero negro.
Conclusiones:
- Las entradas de gas impulsadas por la fusión proporcionan una vía viable para el colapso directo, formando semillas de SBH sin condiciones exóticas.
- El mecanismo simulado explica la rápida aparición de SBHs observados en el universo temprano.
- La posterior acumulación en estas semillas puede conducir a agujeros negros de miles de millones de masas solares en 10^8 años.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:27Gravity between Spherical Bodies
7.2K
Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
7.2K
01:21Schwarzschild Radius and Event Horizon
2.2K
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
2.2K
01:10Detection of Black Holes
1.7K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
1.7K
01:26Divergence and Curl of Magnetic Field
4.5K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
4.5K
01:14Gravitation Between Spherically Symmetric Masses
1.5K
The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
1.5K
01:17The Principle of Superposition and the Gravitational Field
2.3K
The principle of superposition applies to gravitational forces of objects that are sufficiently far apart. It states that the net gravitational force on a point object is the vector sum of the gravitational forces on it due to various objects. The principle helps calculate the force by listing the individual forces and then vectorially summing them up. However, it should be noted that the principle of superposition is not always apparent. In the presence of a second force, the first force could...
2.3K