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By: Amber Shelton

Sirius B. By: Amber Shelton. About Sirius B….

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By: Amber Shelton

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  1. Sirius B By: Amber Shelton

  2. About Sirius B…. Sirius B is a white dwarf. There was no such thing as Sirius B until 1862 when Alvan Clark discovered it while testing one of the best optical telescopes in the world, at the time. They didn’t know anything of it because Sirius A is so bright.

  3. Sirius B orbits Sirius A. Since the discovery of Sirius B, scientists have been agitated and frustrated because Sirius A is so bright that they can’t observe and weigh Sirius A. Sirius is located in the constellation Canis Major. About Sirius B….

  4. More about Sirius B…. Sirius has a surface temperature of 25,000 degrees Celcius, which produces very low energy X-rays. Sirius B is 10, 000 times dimmer than Sirius A. Sirius B has a mass equal to the mass of the Sun, packed into a diameter that is 90% that of the Earth.

  5. Star formation…

  6. The theory of white dwarf stars was developed by S. Chandrasekhar, his name came from the Chandra X-ray Observatory. The story of Sirius B came full known when it was observed by Chandra in October 1999 during the test period. Theory of White dwarf stars:

  7. Sirius B is not a normal star; its spectrum and luminosity indicates that it is hot, but extremely small. • The reason is that the spectrum contains pressure-broadened hydrogen lines, implying a surface environment with a higher density than what a normal star would have. • Assuming the spectrum of Sirius B being a blackbody and using the well-established distance to Sirius, we think that from its luminosity, Sirius B’s radius is only about 5,800 km. • According to Kepler’s law, we can infer that the mass of Sirius B is about 1.03 M. All about sirius b:

  8. The gravity on Sirius B is 400,000 times more than gravity on Earth!! One teaspoon of a white dwarf would way 5 tons In 1844, Sirius B was predicted because of the motion of Sirius A. Even though, Sirius B wasn’t seen until 1862! The average mass of a star is 0.58 M, when Sirius B’s mass is 1.03 M. Interesting facts about sirius B:

  9. Pictures:

  10. Summary: Sirius B Sirius B is a white dwarf star. It is way less brighter than Sirius A. It orbits Sirius A and would way a lot just to pick a little bit of it up. It is a well-known star that is good for observing.

  11. Sirius B is in the main sequence. True False Quiz:

  12. What star does Sirius B orbit? Polaris Vega Sirius A Altair Quiz:

  13. When was Sirius B discovered? 2010 1862 1831 1926 Quiz:

  14. What type of star is Sirius B? Blue giant Red giant White dwarf Yellow-white super giant Quiz:

  15. What constellation is the star located in? Canis Major Ursa Major Lyra Aquila Quiz:

  16. http://www.ufodigest.com/siriusb.html http://space.about.com/od/stars/p/siriusinfo.htm http://chandra.harvard.edu/photo/2000/0065/ http://hyperphysics.phy-astr.gsu.edu/hbase/astro/whdwar.html#c2 http://hyperphysics.phy-astr.gsu.edu/hbase/astro/whdwar.html http://eagle.phys.utk.edu/guidry/astro411/lectures/lecture_ch12.pdf Works Cited:

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