Lecture 13 - 1 Class Vote Question o If a star is expanding...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1. Class Vote Question o If a star is expanding Gravity is overcoming pressure Gravity and pressure are in balance Pressure is overcoming gravity o Shrinking- gravity is overcoming 2. Planetary Nebula- the Partial Victory of Pressure o Thermal pulse- every time a layer burns off and luminosity increases o Spherical series of shells o Move out relatively slowly (30 km/s) (about the Earth's orbiting speed) 3. Where to After the Asymptotic Giant Branch? o How does the star evolve in the HR Diagram? Horizontal branch- burning helium in the core Burning in shell when increasing (on the right) Burning in core when decreasing (leftish) Asymptotic giant branch- shell AND core burning May form planetary nebula 4. White dwarfs- Gravity's Victory? o HR diagram actually expands to higher temperatures ( to the left) o Star temporarily shoots off in this direction of the diagram before finally joining the white dwarfs at the bottom o White dwarfs No nuclear reactions
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern