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PHYS 182 Lecture Notes - Lecture 3: Planetary Nebula, Stellar Evolution, White Dwarf

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School
McGill University
Department
Physics
Course
PHYS 182
Professor
David Hanna

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Document Summary

Use kepler"s laws to measure the masses. Need to be in binary system (50% of all stars) Orbit around center of masses - 1 star orbits another. We see combined from both lights but its changes with time due to orbit of stars. When they are side by side - brightness is at a maximum. When one star is in front - brightness is reduced. When one star is behind - brightness is at a minimum (we only see brightness from 1) See different doppler shifts in combined spectrum. One moves towards as the other moves away. Blue shift in light as it moves towards. Red shift in light as it moves away. Hydrogen absorption lines will move towards different wavelengths. We look for the hydrogen triplet that is always moving together. That is how we know what particle it is. Most massive stars: 100 times mass of sun. Least massive stars : 0. 08 times mass of sun.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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