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The IC133 Water Vapor Maser in the Galaxy M33: A Geometric Distance

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 نشر من قبل Alice Argon
 تاريخ النشر 2004
  مجال البحث فيزياء
والبحث باللغة English
 تأليف A. L. Argon




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We report on the results of a 14 year long VLBI study of proper motions in the IC133 H2O maser source in the galaxy M33. The method of Ordered Motion Parallax was used to model the 3-dimensional structure and dynamics of IC133 and obtain a distance estimate, 800 +/- 180 kpc. Our technique for determining the distance to M33 is independent of calibrations common to other distance indicators, such as Cepheid Period-Luminosity relations, and therefore provides an important check for previous distance determinations.



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