BLACK HOLES National College Iasi

What is a black hole?  A black hole is a region of space from which nothing, not even light, can escape.  It is the result of the deformation of spacetime caused by a very compact mass. National College Iasi More about the black holes

Why it’s call ‘black’?  It is called "black" because it absorbs all the light that hits it, reflecting nothing, just like a perfect black body in thermodynamics. thermodynamics National College Iasi

Simulation  Lensing by a black hole. Animated simulation of gravitational lensing caused by a Schwarzschild black hole going past a background galaxy.Schwarzschild National College Iasi

Event horizon Far away from the black hole a particle can move in any direction. It is only restricted by the speed of light. Closer to the black hole spacetime starts to deform. There are more paths going towards the black hole than paths moving away. Inside of the event horizon all paths bring the particle closer to the center of the black hole. It is no longer possible for the particle to escape. National College Iasi

Singularity  At the center of a black hole as described by general relativity lies a gravitational singularity, a region where the spacetime curvature becomes infinite.  For a non-rotating black hole this region takes the shape of a single point and for a rotating black hole it is smeared out to form a ring singularity lying in the plane of rotation. National College Iasi

Accretion of matter

Photon sphere  The photon sphere is a spherical boundary of zero thickness such that photons moving along tangents to the sphere will be trapped in a circular orbit. National College Iasi

Ergosphere The ergosphere is an oblate spheroid region outside of the event horizon, where objects cannot remain stationary. National College Iasi

The Youngest Black Hole Near Earth

As you can see in the image attached to this article there is a supernova within the M100 galaxy that astronomers from NASA think it can contain the youngest black hole, near in our neighborhood. The image shows Chandra’s X- rays which are gold colored, while the data collected from the ESO Telescope shows them in red and blue, and the data from Spitzer shows them in red. The location of this awesome supernova is labeled as SN1979C. National College Iasi

Authors  Carp Roxana Paula  Condurache Andreea Geanina National College Iasi