Exam 3

Question 1

what is the Origin of a White dwarf ?

Answer 1

White dwarf stars form from low-mass stars running out of fuel, leaving a hot, dense core.

Question 2

what does Electron Degeneracy do to a white dwarf?

Answer 2

Electron degeneracy occurs in white dwarfs ,creating quantum mechanical phenomena due to tightly packed particles.

Question 3

what is the Chandrasekhar Limit and what does it signify?

Answer 3

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.

Question 4

What leads to a Type Ia Supernova Occurrence?

Answer 4

Type Ia supernovae occur when a white dwarf exceeds the Chandrasekhar limit, leading to a thermonuclear explosion.

Question 5

what’s the configuration for a Type 1a supernovae?

Answer 5

A white dwarf exceeds Chandrasekhar limit and explodes.

Question 6

Explain the Life of a High Mass Star?

Answer 6

: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.

Question 7

What will trigger a Type II supernovae
?

Answer 7

High-mass stars undergo core collapse (type II) supernovae when reaching the Chandrasekhar limit, forming a neutron-degenerate core.

Question 8

what causes and gets formed by Neutron degenerate matter?

Answer 8

Neutron-degenerate matter results from the collapse, leading to the formation of neutron stars.

Question 9

Why cant stars fuse Iron?

Answer 9

stars cant fuse iron because fusion requires more energy then it releases.

Question 10

what formation will stars be in when a Neutron star merger happens.

Answer 10

Neutron stars form in binary systems, merging after type II supernovae, releasing neutron- degenerate matter into space.(kilanova)

Question 11

What does the Neutron star merger Contribution to the periodic table.

Answer 11

This contributes to heavy element production and enhances the periodic table.

Question 12

what is the Stellar mass black holes origin?

Answer 12

Stellar mass black holes from the remnants of massive stars after core collapse.

Question 13

Stellar Mass black Holes Mass Left Behind?

Answer 13

star with a mass above 3 solar masses leave behind stellar mass black holes.

Question 14

What is a Pulsar

Answer 14

A pulsar is a highly magnetized, rotating neutron star emitting beams of electromagnetic radiation.

Question 15

Why do pulsar blink?

Answer 15

Its blinking appearance is due to the rotation of its beams relative to Earth.

Question 16

Test of general Relativity bending light and orbits?

Answer 16

General relativity is tested through the bending of light(gravitational lensing) and the bending of planetary orbits, as observed with Mercury.

Question 17

what happens to Time near Large masses?

Answer 17

Time moves slower near large masses, as demonstrated by experiments and observation.

Question 18

Event horizon significance boundary?

Answer 18

The event horizon is the boundary around a black hole beyond which nothing can escape, not even light.

Question 19

Event horizon calculation?

Answer 19

It is calculated using the formula for the Schwarzschild radius based on the mass of a black hole.

Question 20

how do blackholes effect light?

Answer 20

light near a black hole experiences gravitational red shifting, and it struggles to escape dues to the intense gravitational pull.

Question 21

what instruments measure Gravitational waves?

Answer 21

Gravitational waves are measures using laser interferometry, which detects changes in distance caused by spacetime disturbances.

Question 22

Milky way Galaxy components.

Answer 22

The milky way galaxy comprised a bulge, bar, spiral arms, thin disk, thick disk, and halo stars

Question 23

Population 1 stars

Answer 23

young, metal-rich in the disk of the galaxy.

Question 24

Population 2 stars

Answer 24

These stars are older, metal poor stars in the halo of the galaxy.

Question 25

Population 3 stars

Answer 25

These are first generation stars that are metal free.

Question 26

what components are in the center of the galaxy.

Answer 26

The center of the galaxy contains super novae remnants and a supermassive black hole.

Question 27

what types of wavelengths can penetrate the center.

Answer 27

Infrared, X-ray, and radio waves penetrate dust and gas, revealing stars, hot gas and extreme objects.

Question 28

Fate of a satellite galaxy.

Answer 28

The outcome of a satellite galaxies around the milky way will eventually be torn apart by tidal forces.

Question 29

Andromeda and milky way interaction outcome?

Answer 29

The milky way and andromeda galaxy are on a collision course, eventually merging into a single galaxy.

Question 30

What is the order of the R-process

Answer 30

Iron, silicon, oxygen, Neon, Carbon, Helium, Hydrogen.

Question 31

What is the S-process and how long does it take.

Answer 31

the S-process is the neutron degeneracy of a star that cause a star to collapse after a long time,

Question 32

What is degenerate matter?

Answer 32

matter that reaches
the maximum density that can be supported.

Question 33

What is the life of a high mass star?

Answer 33

nebula, main sequence star, red super giant, super nova, neutron star or blackhole,

Question 34

What is the life of a low mass star?

Answer 34

nebula, main sequence star, red giant, planetary nebula, white dwarf,