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Lectures on Stellar Statistics

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Published: 1921
Language: English
Wordcount: 18,362 / 71 pg
Flesch-Kincaid Reading Ease: 60.7
LoC Category: Q
Downloads: 655
Added to site: 2007.07.28
mnybks.net#: 17743
Origin: gutenberg.org
Genres: Science,
Excerpt

50[3]), but considering that the Pole-star ([alpha] Ursæ Minoris) is used at Harvard as a fundamental star of comparison for the brighter stars, and that, according to the observations at Harvard and those of HERTZSPRUNG (A. N. 4518 [1911]), the light of the Pole-star is very nearly invariable, we may say that the zero-point of the photometric scale is chosen in such a manner that for the Pole-star m = 2.12. If the magnitudes are given in another scale than the Harvard-scale (H. S.), it is necessary to apply the zero-point correction. This amounts, for the Potsdam catalogue, to -0m.16.

It is further necessary to determine the scale-ratio. Our magnitudes for the stars emanate from PTOLEMY. It was found that the scale-ratio--giving the ratio of the light-intensities of two consecutive classes of magnitudes--according to the older values of the magnitudes, was approximately equal to 2½. When exact photometry began (with instruments for measuring the magnitudes) in t

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Matthew Bayan
Matthew Bayan is the only person in the world to die and be brought back to life 72 times. He is best known for his book, Eat Fat Be Healthy that describes this experience. Bayan however also had a very adventurous childhood and felt inspired to write down some of those memories after a high school reunion. This formed the backdrop for his coming-of-age mystery, The Firecracker King. As our Author of the Day, Bayan tells us all about it.
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