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S266: A Distant HII Region in the Galaxy

Published online by Cambridge University Press:  12 April 2016

A. Manchado ,
C. Esteban  and
J.M. Vilchez
A. Manchado
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
C. Esteban
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
J.M. Vilchez
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain

Extract

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Long slit high and low resolution spectroscopy of S266 was conducted in order to investigate its precise nature. The Hα high resolution profile shows two different components; the narrow one extends all over the nebula while a very broad (ΔVFWHM = 700 km s−1) indicates that a strong wind is associated with the central star. From the narrow component we have worked out radial velocity (VLRS = 23 km s−1) which yields to a kinematic distance of a 9 kpc. This value implies a galactocentric distance of 19 kpc which makes this region one of the most distant in the Galaxy.

Type
I. Molecular Clouds, Star Formation And HII Regions
Information
International Astronomical Union Colloquium , Volume 120: Structure and Dynamics of the Interstellar Medium , 1989 , pp. 129
Copyright
Copyright © Springer-Verlag 1989