Hostname: page-component-7c8c6479df-nwzlb Total loading time: 0 Render date: 2024-03-29T11:29:22.797Z Has data issue: false hasContentIssue false

1612 MHz OH maser monitoring with the Nançay Radio Telescope

Published online by Cambridge University Press:  24 July 2012

D. Engels
Affiliation:
Hamburger Sternwarte, Gojenbergsweg 112, D–21029 Hamburg, Germany email: dengels@hs.uni-hamburg.de
E. Gérard
Affiliation:
Observatoire de Paris, 5 Place J Janssen, F–92195 Meudon Cedex, France email: eric.gerard@obspm.fr, nicole.hallet@obspm.fr
N. Hallet
Affiliation:
Observatoire de Paris, 5 Place J Janssen, F–92195 Meudon Cedex, France email: eric.gerard@obspm.fr, nicole.hallet@obspm.fr
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.

20 OH/IR stars are monitored in the 1612 MHz OH maser line with the Nançay Radio Telescope. The program started in 2008 with monthly observations of the full sample and will last at least until end of 2012. The aim is the determination of the linear diameter of the circumstellar shell using the phase lag between the light curves of the varying OH maser lines. To use them for distance determinations, angular diameters are obtained by interferometric measurements while the stars pass the maximum of their OH maser flux density variations. The periods of the OH/IR stars monitored are between 425 and >2000 days.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2012

References

Chen, P. S., Szczerba, R., Kwok, S., & Volk, K. 2001, A&A 368, 1006Google Scholar
Habing, H. J. 1996, A&A Reviews 7, 97Google Scholar
Herman, J. & Habing, H. J. 1985, A&AS 59, 523Google Scholar
van Langevelde, H. J., van der Heiden, R., & van Schooneveld, C. 1990, A&A 239, 193Google Scholar