Exam 3 Flashcards
what is the Origin of a White dwarf ?
White dwarf stars form from low-mass stars running out of fuel, leaving a hot, dense core.
what does Electron Degeneracy do to a white dwarf?
Electron degeneracy occurs in white dwarfs ,creating quantum mechanical phenomena due to tightly packed particles.
what is the Chandrasekhar Limit and what does it signify?
The Chandrasekhar limit is the maximum mass before a white dwarf collapses; if it exceeds about 1.4 times the Sun’s mass, it leads to a Type I supernova.
What leads to a Type Ia Supernova Occurrence?
Type Ia supernovae occur when a white dwarf exceeds the Chandrasekhar limit, leading to a thermonuclear explosion.
what’s the configuration for a Type 1a supernovae?
A white dwarf exceeds Chandrasekhar limit and explodes.
Explain the Life of a High Mass Star?
:High-mass stars begin as collapsing gas, under go nuclear fusion in the main sequence stage, become red giants(low-mass)or supernovae (high-mass),marking the end of their lives. Remnants include neutron stars or blackholes.
What will trigger a Type II supernovae
?
High-mass stars undergo core collapse (type II) supernovae when reaching the Chandrasekhar limit, forming a neutron-degenerate core.
what causes and gets formed by Neutron degenerate matter?
Neutron-degenerate matter results from the collapse, leading to the formation of neutron stars.
Why cant stars fuse Iron?
stars cant fuse iron because fusion requires more energy then it releases.
what formation will stars be in when a Neutron star merger happens.
Neutron stars form in binary systems, merging after type II supernovae, releasing neutron- degenerate matter into space.(kilanova)
What does the Neutron star merger Contribution to the periodic table.
This contributes to heavy element production and enhances the periodic table.
what is the Stellar mass black holes origin?
Stellar mass black holes from the remnants of massive stars after core collapse.
Stellar Mass black Holes Mass Left Behind?
star with a mass above 3 solar masses leave behind stellar mass black holes.
What is a Pulsar
A pulsar is a highly magnetized, rotating neutron star emitting beams of electromagnetic radiation.
Why do pulsar blink?
Its blinking appearance is due to the rotation of its beams relative to Earth.
Test of general Relativity bending light and orbits?
General relativity is tested through the bending of light(gravitational lensing) and the bending of planetary orbits, as observed with Mercury.
what happens to Time near Large masses?
Time moves slower near large masses, as demonstrated by experiments and observation.
Event horizon significance boundary?
The event horizon is the boundary around a black hole beyond which nothing can escape, not even light.
Event horizon calculation?
It is calculated using the formula for the Schwarzschild radius based on the mass of a black hole.
how do blackholes effect light?
light near a black hole experiences gravitational red shifting, and it struggles to escape dues to the intense gravitational pull.
what instruments measure Gravitational waves?
Gravitational waves are measures using laser interferometry, which detects changes in distance caused by spacetime disturbances.
Milky way Galaxy components.
The milky way galaxy comprised a bulge, bar, spiral arms, thin disk, thick disk, and halo stars
Population 1 stars
young, metal-rich in the disk of the galaxy.
Population 2 stars
These stars are older, metal poor stars in the halo of the galaxy.
Population 3 stars
These are first generation stars that are metal free.
what components are in the center of the galaxy.
The center of the galaxy contains super novae remnants and a supermassive black hole.
what types of wavelengths can penetrate the center.
Infrared, X-ray, and radio waves penetrate dust and gas, revealing stars, hot gas and extreme objects.
Fate of a satellite galaxy.
The outcome of a satellite galaxies around the milky way will eventually be torn apart by tidal forces.
Andromeda and milky way interaction outcome?
The milky way and andromeda galaxy are on a collision course, eventually merging into a single galaxy.
What is the order of the R-process
Iron, silicon, oxygen, Neon, Carbon, Helium, Hydrogen.
What is the S-process and how long does it take.
the S-process is the neutron degeneracy of a star that cause a star to collapse after a long time,
What is degenerate matter?
matter that reaches
the maximum density that can be supported.
What is the life of a high mass star?
nebula, main sequence star, red super giant, super nova, neutron star or blackhole,
What is the life of a low mass star?
nebula, main sequence star, red giant, planetary nebula, white dwarf,
