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A precise distance to IRAS 00420+5530 via H2O maser parallax with the VLBA

Published online by Cambridge University Press:  01 March 2007

G. A. Moellenbrock ,
M. J. Claussen  and
W. M. Goss
G. A. Moellenbrock
Affiliation:
National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USA email: gmoellen@nrao.edu, mclausse@nrao.edu, mgoss@nrao.edu
M. J. Claussen
Affiliation:
National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USA email: gmoellen@nrao.edu, mclausse@nrao.edu, mgoss@nrao.edu
W. M. Goss
Affiliation:
National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801, USA email: gmoellen@nrao.edu, mclausse@nrao.edu, mgoss@nrao.edu
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Abstract

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We have used the VLBA to measure the annual parallax of the H2O masers in the star-forming region IRAS 00420+5530 (l=122.0°, b= -7.1°). This measurement yields a direct distance estimate of 2.17±0.05kpc, which disagrees substantially with most other published estimates (a range from 1.7 to 7.7kpc). This distance is consistent with recent parallax-based distances reported for W3(OH) (Xu et al. 2006, Hachisuka et al. 2006), lending additional support to the conclusion that the Perseus Spiral Arm of the Milky Way is a factor of at least two closer than kinematic distance estimates imply at galactic longitude ~130 degrees.

References

Brand, J., et al. 1994, A&AS 103, 541Google Scholar
Brand, J., et al. 2001, A&A 370, 230Google Scholar
Brisken, W., et al. 2002, ApJ 571, 906CrossRefGoogle Scholar
Chatterjee, S., et al. 2004, ApJ 604, 339CrossRefGoogle Scholar
Kumar, M. S. N., et al. 2006, A&A 449, 1033Google Scholar
Hachisuka, K., et al. 2006, ApJ 645, 337CrossRefGoogle Scholar
Molinari, S., et al. 2002, ApJ 570, 758CrossRefGoogle Scholar
Neckel, T. & Staude, H. J. 1984, A&A 131, 200Google Scholar
van Langevelde, H. J. et al. , 2000, A&A 357, 945Google Scholar
Xu, Y. et al. 2006, Science 311, 54CrossRefGoogle Scholar
Zhang, Q. et al. 2005, ApJ 625, 864CrossRefGoogle Scholar