Transcript Black Holes - SMU Physics

Black Holes
By: Alex Saladna
S
Where do Black Holes come
from?
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Collapse of stars- caused when protons that carry
momentum outward begin to no longer be produced.
As a result the star caves under its own gravity.
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White Dwarf
Caused by the collapse of smaller stars and are essentially
the burning remnants of the star’s core.
The star will eventually cool and the result will be a black
dwarf.
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Neutron stars
Large stars can form neutron stars when they collapse.
These are extremely dense stars that actually turn protons and electrons
into neutrons due to the immense gravity.
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Black Holes
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Caused when a star collapses and gravity is so great that a certain
critical density is reached to the point where a black hole is formed.
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The black hole proceeds to eat its way out of the sun and releases
gamma ray bursts from both ends.(This happens before the star even
explodes)
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Black Hole Structure
Accretion disk- Super heated
material swirling around the
black hole
Event horizon- “The point of no
return”
Quasi Periodic Oscillation- Used
to determine size of a black hole
and is caused by material moving
along the inner edge of the
accretion disk.
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Particle Jet
Jets are cause when
energetic gas accrete in
a black hole but the
black hole is unable to
absorb the energy. As a
result some of it is shot
out in the form of
energetic particles.
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Gravitational Lensing
The Castle on the Mall
Light is bent around the object to the point where we can see the back of the castle
These rings of light that are formed are called Einstein Rings
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Schwarzschild Radius
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Radius of a sphere such that if
the mass of an object were
compressed to the size of this
sphere it would take the speed
of light to escape it.
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With blackholes the radius is
actually smaller than the
Schwarzschild Radius.
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Larger black holes have a larger
density while smaller black holes
have a high density and a small
Schwarzschild radius
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Detecting black holes
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Black holes absorb light and
pretty much everything that it
encounters so how do we know
they exist?
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The same way glass(which is
invisible) distorts light so do
black holes.
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We can detect black holes by
observing such distortions in
light
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Work Cited
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"Black Holes." The Kavli Institute for Particle Astrophysics and Cosmology.
Stanford, n.d. Web. 30 Nov. 2014.
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"Black Holes - NASA Science." Black Holes - NASA Science. N.p., n.d. Web. 17
Nov. 2014.
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"Exploring Black Holes with Chandra X-ray Observatory." Exploring Black Holes.
Harvard, n.d. Web. 18 Nov. 2014.
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"Frequently Asked Questions About Black Holes." Frequently Asked Questions
About Black Holes. Virginia Tech, n.d. Web. 18 Nov. 2014.
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"HubbleSite: Black Holes: Gravity's Relentless Pull Interactive: Encyclopedia."
HubbleSite: Black Holes: Gravity's Relentless Pull Interactive: Encyclopedia. N.p.,
n.d. Web. 18 Nov. 2014.
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Zhankui, Lu, and Mo H. J. "CLASSICAL BULGES, SUPERMASSIVE
BLACKHOLES AND AGN FEEDBACK: EXTENSION TO LOW-MASS GALAXIES."
Arvix. N.p., 17 July 2014. Web. 18 Nov. 2014.
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Work Cited Images
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"Black Hole." Wikipedia. Wikimedia Foundation, 29 Nov. 2014. Web. 29 Nov. 2014.
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"Black Holes - Viewing Gallery." Black Holes - Viewing Gallery. N.p., n.d. Web. 29 Nov. 2014.
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"Black Holes." The Kavli Institute for Particle Astrophysics and Cosmology. Stanford, n.d. Web. 30
Nov. 2014.
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"CASTLES Survey." Gravitational Lens Data Base. N.p., n.d. Web. 29 Nov. 2014.
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"Charged Black Holes: The Reissner-Nordström Geometry." Charged Black Holes: The ReissnerNordström Geometry. N.p., n.d. Web. 29 Nov. 2014.
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Dumé, Belle. "X-rays Light up Gamma-ray Burst." Physicsworld.com. N.p., 28 Jan. 2004. Web. 29
Nov. 2014.
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Dunbar, Brian. NASA. NASA, 02 Aug. 2012. Web. 29 Nov. 2014.
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Dunbar, Brian. NASA. NASA, n.d. Web. 29 Nov. 2014.
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"Life Cycle of a Star: White Dwarf." Prezi.com. N.p., n.d. Web. 29 Nov. 2014.
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"NICER Mission Set to Reveal the Secrets of Neutron Stars." SciTech Daily. N.p., n.d. Web. 29 Nov.
2014.
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QUESTIONS?
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