ASTR 114 Lecture Notes - Lecture 26: Proper Motion, Red Supergiant Star, Radial Velocity
10 Jan 2020
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Star x is in luminosity class iii, while star y is in luminosity class v. therefore star x is larger in radius than star y. Sirius is a star with spectral type a star and rigel is a star with spectral type b star. Rigel has a higher surface temperature than sirius. Come in pairs, representing n and s magnetic fields. A star of the sun"s diameter, but twice as hot, must be 16x more luminous than the. In a binary system, the less massive star always stays further from the center of mass and moves faster. Star a has a parallax of 0. 02 arc sec. Star b has a parallax of 0. 002 arcsec. Star a and star b both have an apparent magnitude of 2. 0, but star a has an absolute magnitude of +3. 0 and star b has an absolute magnitude of -5. 0.
