Notes
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
Properties of stars during hydrogen burning
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. The generated heat will then exactly match the outgoing energy flow (luminosity) at any point in the star. Heat flows from h ...
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. The generated heat will then exactly match the outgoing energy flow (luminosity) at any point in the star. Heat flows from h ...
Section 15
... simple, if crude, estimate of the maximum radius for a protostar as it begins its evolution. We can also estimate the average internal temperature, from the Virial theorem, T ≃ ...
... simple, if crude, estimate of the maximum radius for a protostar as it begins its evolution. We can also estimate the average internal temperature, from the Virial theorem, T ≃ ...
I : Internal structure of main sequence stars
... The luminosity L The efficiency of the fusion η The mass of the star M The fraction of the stellar mass that can participate in the fusion reactions f ...
... The luminosity L The efficiency of the fusion η The mass of the star M The fraction of the stellar mass that can participate in the fusion reactions f ...
PowerPoint Presentation - ASTR498E High energy
... A star leaves the main sequence once it exhausts its supply of hydrogen in the core This lifetime depends upon ...
... A star leaves the main sequence once it exhausts its supply of hydrogen in the core This lifetime depends upon ...
Extension worksheet – Topic 6 - Cambridge Resources for the IB
... Extension Worksheet – Option E, Worksheet 2, HL only ...
... Extension Worksheet – Option E, Worksheet 2, HL only ...
wk09noQ
... a result of the proto-star becoming smaller • The exact track in an HR diagram followed by a contracting proto-star depends on its mass • These tracks are called Hayashi tracks, after the Japanese astrophysicist who first researched this problem ...
... a result of the proto-star becoming smaller • The exact track in an HR diagram followed by a contracting proto-star depends on its mass • These tracks are called Hayashi tracks, after the Japanese astrophysicist who first researched this problem ...
Hertzsprung - Russel Diagram
... 10. What color are the coolest stars? _____________ 11. What category of stars is hot but not very luminous? ______________________________ 12. If you know a stars color, you can determine it’s ______________________________________. 13. The H-R Diagram is based on what two criteria? A. ____________ ...
... 10. What color are the coolest stars? _____________ 11. What category of stars is hot but not very luminous? ______________________________ 12. If you know a stars color, you can determine it’s ______________________________________. 13. The H-R Diagram is based on what two criteria? A. ____________ ...
A Star is Born!
... • A proto-star’s temperature and luminosity can be plotted on a Hertzsprung-Russell diagram or HR diagram • Proto-stars tend to become hotter but less luminous during the process of gravitational contraction; the decrease in luminosity is mostly a result of the proto-star becoming smaller • The exac ...
... • A proto-star’s temperature and luminosity can be plotted on a Hertzsprung-Russell diagram or HR diagram • Proto-stars tend to become hotter but less luminous during the process of gravitational contraction; the decrease in luminosity is mostly a result of the proto-star becoming smaller • The exac ...
OP/IP27 Stars HR life of stars WS
... Directions: Use the HR diagram on page R63 in your textbook to answer the following ...
... Directions: Use the HR diagram on page R63 in your textbook to answer the following ...
Chapter 7 Vocabulary212
... 3. astronomical unit- average distance between Earth and Sun (150 million km) 4. light year- distance light travels in 1 year 5. apparent magnitude- measure of how bright the object appears from Earth 6. luminosity7. Star- large ball of gas held together by gravity 8. Radiative zone- shell of cooler ...
... 3. astronomical unit- average distance between Earth and Sun (150 million km) 4. light year- distance light travels in 1 year 5. apparent magnitude- measure of how bright the object appears from Earth 6. luminosity7. Star- large ball of gas held together by gravity 8. Radiative zone- shell of cooler ...
the lab handout here
... A Main Sequence star that is 10,000 times more luminous than the sun, most likely has a temperature of _________________________________________________________________ ...
... A Main Sequence star that is 10,000 times more luminous than the sun, most likely has a temperature of _________________________________________________________________ ...
Stellar Properties and Stellar Evolution Study Guide Name Why
... 5. A shock wave may be the stimulus that causes a nebula to start condensing to form new ...
... 5. A shock wave may be the stimulus that causes a nebula to start condensing to form new ...
Click here for Jeopardychap16
... Give correct order of Evolution of sun-like star From young to old: ...
... Give correct order of Evolution of sun-like star From young to old: ...
Comparing Earth, Sun and Jupiter
... The density, pressure and temperature are related by the equation of state, which can usually be approximated as the ideal gas law. ...
... The density, pressure and temperature are related by the equation of state, which can usually be approximated as the ideal gas law. ...
The Evolutionary Cycle of Stars
... NEBULA(e) that contains gas & dust from the beginnings of a star. Cosmic cloud of gas & dust, basic building blocks of the universe, & the largest objects in the universe. Temperatures rise, driven by gravitational collapse, and a PROTOSTAR forms. It is the early stage in star formation. The star ev ...
... NEBULA(e) that contains gas & dust from the beginnings of a star. Cosmic cloud of gas & dust, basic building blocks of the universe, & the largest objects in the universe. Temperatures rise, driven by gravitational collapse, and a PROTOSTAR forms. It is the early stage in star formation. The star ev ...
Introduction to Astronomy
... • Due to the higher central temperature, the star’s luminosity is greater than before… • This increased energy production causes the outer part of the star to expand and cool (counterintuitive!)… • We now have a very large, cool, luminous star: a “red ...
... • Due to the higher central temperature, the star’s luminosity is greater than before… • This increased energy production causes the outer part of the star to expand and cool (counterintuitive!)… • We now have a very large, cool, luminous star: a “red ...
Main Sequence Stars
... They plotted the locations of stars on a graph with the horizontal coordinate being spectral type (equivalent to temperature) and the vertical coordinate being absolute magnitude (equivalent to luminosity). The result, called the Hertzsprung-Russell diagram, or H-R diagram, is widely used in modern ...
... They plotted the locations of stars on a graph with the horizontal coordinate being spectral type (equivalent to temperature) and the vertical coordinate being absolute magnitude (equivalent to luminosity). The result, called the Hertzsprung-Russell diagram, or H-R diagram, is widely used in modern ...