Video Experimental Relacionado

Updated: Feb 24, 2026

Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Alimentación por presión de los agujeros negros supermasivos

Bianca M Poggianti¹, Yara L Jaffé², Alessia Moretti¹

¹INAF-Astronomical Observatory of Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy.

|August 18, 2017

Resumen

El desprendimiento de la presión ram en los cúmulos de galaxias puede canalizar gas para alimentar núcleos galácticos activos. Este estudio encuentra que la mayoría de las galaxias de medusas, que están muy despojadas, albergan núcleos activos, lo que sugiere que la presión del ariete desencadena este proceso de alimentación.

Área de la Ciencia:

La astronomía
La astrofísica
Evolución de las galaxias

Sus antecedentes:

Los núcleos galácticos activos (AGN) son alimentados por agujeros negros supermasivos que acumulan materia.
El conducto de gas a los centros galácticos y la eliminación de gas de las galaxias son procesos clave en la evolución de las galaxias.
El desprendimiento por presión de ram por el gas intracluster es un mecanismo conocido para eliminar el gas de las galaxias.

Objetivo del estudio:

Investigar la relación entre el desprendimiento de presión de ram y la incidencia de núcleos galácticos activos en galaxias medusas.
Para determinar los procesos físicos responsables de alimentar a los agujeros negros supermasivos en las galaxias despojadas.

Principales métodos:

Observación y análisis de una muestra de siete galaxias medusas.
Evaluación de la actividad nuclear y los conos de ionización en estas galaxias.
Análisis de la posición galáctica y la velocidad relativa al cúmulo de galaxias.

Principales resultados:

Seis de las siete galaxias medusas en la muestra albergan un núcleo activo.
Dos de estas galaxias también exhiben conos de ionización a escala galáctica.
Los datos apoyan fuertemente la presión ram como un mecanismo para la entrada de gas hacia el centro galáctico.

Conclusiones:

El desprendimiento de presión ram es un factor significativo en el desencadenamiento de núcleos galácticos activos en galaxias medusas.
Este proceso proporciona un mecanismo viable para alimentar a los agujeros negros supermasivos centrales.
La interacción entre la presión ram y la actividad AGN puede ser un circuito de retroalimentación complejo.

Más Videos Relacionados

Image-guided Convection-enhanced Delivery into Agarose Gel Models of the Brain

Image-guided Convection-enhanced Delivery into Agarose Gel Models of the Brain

Published on: May 14, 2014

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Videos de Conceptos Relacionados

Detection of Black Holes

Detection of Black Holes

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...

Schwarzschild Radius and Event Horizon

Schwarzschild Radius and Event Horizon

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...

Gravitation Between Spherically Symmetric Masses

Gravitation Between Spherically Symmetric Masses

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.

Momentum And Radiation Pressure

Momentum And Radiation Pressure

An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container.

Rocket Propulsion in Gravitational Field - II

Rocket Propulsion in Gravitational Field - II

A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum.
A rocket's acceleration depends on three major factors, consistent with the...

Rocket Propulsion in Gravitational Field - I

Rocket Propulsion in Gravitational Field - I

Rockets range in size from small fireworks that ordinary people use to the enormous Saturn V that once propelled massive payloads toward the Moon. The propulsion of all rockets, jet engines, deflating balloons, and even squids and octopuses are explained by the same physical principle: Newton's third law of motion. The matter is forcefully ejected from a system, producing an equal and opposite reaction on what remains.
The motion of a rocket in space changes its velocity (and hence its...