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Contributions from the Princeton University Observatory Volume 1-5

Contributions from the Princeton University Observatory Volume 1-5


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...no accurate photometric curves. The work done with the various Harvard photometers is in all cases incomplete and is often affected with unaccountable night errors. The star deserves careful observation by one of the highly accurate modern methods, and the light measures should be undertaken if possible in connection with a spectroscopic study. No doubt there are irregularities in the system, but the evidence favoring all the small, anomalous but permanent oscillations in the light curve that were supposed by Stratonow appears to the writer to be untrustworthy. The Harvard photometric work, though insufficient for an individual solution, suffices to contradict some of the largest secondary variations. Incidentally the Harvard photometric range is practically identical with the adopted visual range. The details of the computations for / 3 Lyra, which were rather extensive and laborious as other curves were reduced and investigated in the hope of finding a more complete and homogeneous series of observations, will not be entered into here. A uniform solution was not possible. The darkened solution represents the observations fairly well--particularly well, in fact, when it is considered that Stratonow's mean curve was used by him to demonstrate many irregularities and is here drawn as a smooth curve with symmetrical maxima. There is some indication of differential reflection by the excess of light near secondary minimum, but it was not considered in the discussion because of the uncertainty of the whole curve. Also the small and uncertain orbital eccentricity was not taken into account. The darkened circular elements are given in the Table of Orbits. The extremely low density for a first type star, and the low inclination are to be noticed. A very small chang...


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Product Details
  • ISBN-13: 9781130591507
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 80
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 1130591506
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 159 gr

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