Source: http://en.wikipedia.org/wiki/Solar_System. So u rce. : h ttp. ://w w w .a b so
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Student Notes
Source: http://en.wikipedia.org/wiki/Solar_System
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E1 INTRODUCTION TO THE UNIVERSE E2 STELLAR RADIATION AND STELLAR TYPES
Source: Physics for the IB Diploma, 5th Ed, Tsokos
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Source : http://curious.astro.cornell.edu Source : http://en.wikipedia.org/wiki/File:Star_trails_
Source: Physics for the IB Diploma, 5th Ed, Tsokos
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Source: Physics for the IB Diploma, 5th Ed, Tsokos
Source: Physics for the IB Diploma, 5th Ed, Tsokos
EXAMPLE 1 The apparent brightness of a star is 6.4 × 10-8 W m-2. If its distance is 15 ly, what is its luminosity?
EXAMPLE 2 A star has half the sun’s surface temperature and 400 times its luminosity. How many times bigger is it?
3
-3
(W m )
Source: Physics for the IB Diploma, 5th Ed, Tsokos
Source: Physics for the IB Diploma, 5th Ed, Tsokos
EXAMPLE 3 Most of the energy of the Sun is emitted at a wavelength of 5.0 x 10-7 m. Determine the surface T of the Sun.
EXAMPLE 4 Our Sun radiates a total power of 3.9 x 1026 W and its radius is 7.0 x 108 m. Determine the surface T of the Sun.
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Source: Physics for the IB Diploma, 5th Ed, Tsokos
Source: http://casswww.ucsd.edu/archive/public/tutorial/Stars.html
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Source: http://www.murryclan.us/nsg/star.html
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Source: Physics for the IB Diploma, 5th Ed, Tsokos
Source: Physics for the IB Diploma, 5th Ed, Tsokos
EXAMPLE 5 A visual binary with a period of 50 ly is at a distance from Earth of 8.79 ly. The distance between the stars subtends an angle at Earth of 7.56 arcsecond (the ‘arc length’). Find the sum of the masses of the stars in this binary system.
EXAMPLE 6 Draw the physical binary star system with labeled letters corresponding to the light curve shown.
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Source: Physics for the IB Diploma, 5th Ed, Tsokos
STAR SIZE COMPARISONS:
Source: http://www.murryclan.us/nsg/star.html
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Source: Physics for the IB Diploma, 5th Ed, Tsokos
COMMON TERMS IN ASTROPHYSICS
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