The IC 133 Water Vapor Maser in the Galaxy M33: A Geometric Distance | Zendy

A. L. Argon | Zendy; L. J. Greenhill | Zendy; J. M. Moran | Zendy; M. J. Reid | Zendy; K. M. Menten | Zendy; Makoto Inoue | Zendy

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The IC 133 Water Vapor Maser in the Galaxy M33: A Geometric Distance

Author(s) -

A. L. Argon,

L. J. Greenhill,

J. M. Moran,

M. J. Reid,

K. M. Menten,

Makoto Inoue

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/424731

Subject(s) - parallax , maser , galaxy , cepheid variable , very long baseline interferometry , physics , luminosity , cosmic distance ladder , astrophysics , proper motion , astronomy , stars , redshift

We report on the results of a 14 year long VLBI study of proper motions inthe IC133 H2O maser source in the galaxy M33. The method of Ordered MotionParallax was used to model the 3-dimensional structure and dynamics of IC133and obtain a distance estimate, 800 +/- 180 kpc. Our technique for determiningthe distance to M33 is independent of calibrations common to other distanceindicators, such as Cepheid Period-Luminosity relations, and therefore providesan important check for previous distance determinations.Comment: Accepted for publication in the Astrophysical Journa

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