Bibcode
Waldhausen, S.; Martínez, R.; Feinstein, C.
Referencia bibliográfica
Revista Mexicana de Astronomia y Astrofisica, Ser. Conf., Vol. 8, p. 75 - 77
Fecha de publicación:
0
1999
Número de citas
0
Número de citas referidas
0
Descripción
The authors present the first results of their multicolor polarimetric
study of stars in the association Ara OB1. Stars belonging to the
clusters NGC 6204, NGC 6193, NGC 6167, and the local field were observed
as part of a global study of the region. The polarimetry shows that the
orientation of the polarimetric vectors of member stars are very close
in each cluster. For NGC 6204 and NGC 6193 the average values are
36.2±9.5, 51.6±13 respectively, and for NGC 6167
108.3±8.5 degrees. The first two values are compatible with dust
aligned with the direction of the Galactic plane, while the value for
NGC 6167 is not. This cluster appears to be at the center of an
expanding gas structure, possibly originated by stellar winds or
supernova explosions. The properties of the dust in the region, and the
possibility of sequential star formation in the OB association are also
discussed.