Hostname: page-component-848d4c4894-4hhp2 Total loading time: 0 Render date: 2024-05-11T15:00:31.589Z Has data issue: false hasContentIssue false
  • English
  • Français

Trigonometric parallax measurements of post-AGB stars with VERA

Published online by Cambridge University Press:  30 August 2012

Hiroshi Imai  and
Daniel Tafoya
Hiroshi Imai
Affiliation:
Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan email: hiroimai@sci.kagoshima-u.ac.jp
Daniel Tafoya
Affiliation:
Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan email: hiroimai@sci.kagoshima-u.ac.jp
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A trigonometric parallax distance is measurable for a planetary nebula if it harbors H2O (or OH) maser spots. We have demonstrated it for H2O maser sources, K3-35, IRAS 19312+1950 and IRAS 18286-0959 using the VLBI Exploration of Radio Astrometry (VERA). They are post-AGB stars and exhibit peculiar morpho-kinematical structures like a bipolar planetary nebula or a bipolar molecular jet (water fountain). The luminosities and secular motions of these sources derived from the trigonometric distances and proper motions of the H2O masers suggest that their parental stars may be intermediate-mass (2M⊙ < M* < 8 M⊙) evolved stars.

Keywords

masersstars:distancesindividuals (K3-35 IRAS 19312+1950 IRAS 18286-0959)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 394 - 395
Copyright
Copyright © International Astronomical Union 2012

References

Imai, H., Tafoya, D., Honma, M., Hirota, T., Miyaji, T. 2011, PASJ, 63, 87 Google Scholar
Tafoya, D., et al. 2011, PASJ, 63, 71 CrossRefGoogle Scholar