The star Sirius has an apparent magnitude of -1.46 and appears 95-times brighter compared to
the more distant star Tau Ceti, which has an absolute magnitude of 5.69.
(a) Explain the terms apparent magnitude, absolute magnitude and bolometric magnitude.
(b) Calculate the apparent magnitude of the star Tau Ceti.
(c) Find the distance between the Earth and Tau Ceti.
Answers
Answer:
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Explanation:
(a)the apparent magnitude is the observed visible brightness from Earth which depends on the distance of the object. The absolute magnitude is the apparent magnitude at a distance of 10 pc (3.1×1017 m), therefore the bolometric absolute magnitude is a logarithmic measure of the bolometric luminosity
(b)Tau Ceti has an apparent magnitude of 3.49 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 5.68 If you used the 2007 Parallax value, you would get an absolute magnitude of 5.68.
(c)the nearest sun-like star, tau Ceti, which is about 12 light years away and visible to the naked eye.
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Answer:
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Explanation: