Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-26T04:52:56.290Z Has data issue: false hasContentIssue false
  • English
  • Français

First VLBI Observations of 6.3 cm OH Masers in Compact HII Regions

Published online by Cambridge University Press:  03 August 2017

A. Baudry ,
P. J. Diamond ,
D. Graham ,
M. Walmsley ,
R. Booth ,
N. Brouillet  and
G. Daigne
A. Baudry
Affiliation:
Observatoire de Bordeaux, 33270 Floriac, France
P. J. Diamond
Affiliation:
NRAO, Charlottesville, 2015 Ivy Rd, Charlottesville, VA 22903
D. Graham
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-5300 Bonn 1, FRG
M. Walmsley
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-5300 Bonn 1, FRG
R. Booth
Affiliation:
Onsala Space Observatory, S-43900 Onsala, Sweden
N. Brouillet
Affiliation:
Observatoire de Bordeaux, 33270 Floriac, France
G. Daigne
Affiliation:
Observatoire de Bordeaux, 33270 Floriac, France

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.

VLBI synthesis observations of the 2Π1/2, J = 1/2 excited-state of OH at 6.3 cm (ΔF = 1–0 = 4765.562 MHz) have been made towards four compact HII regions. Detailed maps have been produced for W3(OH) where three groups of sources are distributed over a region ∼ 0.01 pc in size. The brightest sources are shown to be saturated masers with TB ≳ 109 K. In ONl a weak feature gives fringes with a ∼ 0.05″ lobe spacing.

Type
Galactic
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 235 - 236
Copyright
Copyright © Reidel 1988 

References

Baudry, A., Diamond, P.J., Graham, D., Walmsley, M., Booth, R., 1987, Astron. Astrophys., in preparation Google Scholar
Guilloteau, S., Baudry, A., Walmsley, M., 1987, Astron. Astrophys. 153, 179 Google Scholar
Moran, J.M., Reid, M.J., Lada, C.J., Yen, J.L., Johnston, K.J., Spencer, J.H., 1978, Astrophys. J. 224, L67 CrossRefGoogle Scholar
Rickard, L.J., Zuckerman, B., Palmer, P., 1975, Astrophys. J. 200, 6 CrossRefGoogle Scholar