ISU PHY 102 - Formation/Death of Stars (7 pages)

Previewing pages 1, 2 of 7 page document View the full content.
View Full Document

Formation/Death of Stars



Previewing pages 1, 2 of actual document.

View the full content.
View Full Document
View Full Document

Formation/Death of Stars

152 views


Lecture number:
23
Pages:
7
Type:
Lecture Note
School:
Illinois State University
Course:
Phy 102 - Atoms to Galaxies
Edition:
1

Unformatted text preview:

PHY 102 1st Edition Outline of Last Lecture I Big Bang Review II The First Epoch a Temperature not time b Predictions III Standard Model s Cosmic Zoo a Quarks b Radiation IV The Second Epoch V The Third Epoch VI The Fourth Epoch VII The Fifth Epoch VIII Proton Proton Reaction IX The Sixth Epoch X The Seventh Epoch XI Summary Outline of Current Lecture I Cosmic Structure Formation II Star Formation III Wrinkles In Spacetime These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute IV Problems with the Standard form of Cosmology V Inflationary Cosmology VI Galaxy Formation Uncertainty VII Death of a Star a White Dwarfs b Black HOles Current Lecture I Cosmic Structure Formation a Today we have a matter dominated universe ruled by the force of gravity i The formation of stars and the organization of stars in clusters raise questions about the formation of the universe ii Some variations need to be accounted for b Slight variations in density produce formation regions for stars and galaxies c 1st generation stars and galaxies have 74 H and 26 He by mass i Oldest stars we see are in globular clusters and tend to have mostly hydrogen and helium and hardly anything else ii E mc2 is the energy poured out from the reactions that produce visible light d 2nd generation stars are enriched our sun is at least a second generation star e Triple Alpha Process i Helium in a core then all the helium in the core is converted to carbon in a matter of minutes II Star Formation a As H and He accrete gas pressure increases limiting further growth unless there is suffiecient matter maximum star mass is about 60Msun b The Jeans mass 105Msun constitutes the minimum amount of mass required for star formation corresponds to globular star cluster c Collapses of smaller clouds are helped along by i Stochastic processes wakes of exploding stars or two or more gas clouds merging ii Compression by magnetic



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Formation/Death of Stars and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Formation/Death of Stars and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?