Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998astl...24..237l&link_type=abstract
Astronomy Letters, Volume 24, Issue 2, March 1998, pp.237-247; Pis'ma v Astronomicheskii Zhurnal, Vol. 24, p. 285
Astronomy and Astrophysics
Astronomy
6
Scientific paper
An analysis of the observations of the multishell complex in the Cyg OB1, Cyg OB3 region in the H alpha line (Lozinskaya et al. 1998) and in the 21-cm line (Dewdney and Lozinskaya 1994) and their comparison with the IRAS and IUE archival data have revealed patterns of behavior that are common to several well-studied supershells around OB associations. An important common property is their `two-component kinematics,' i.e., the coexistence of bright emission at low velocities and weak high-velocity emission at the same location in the shell. We propose a possible scenario for the formation of this two-component kinematics: two sets of lines are shown to be formed at different stages and under the effect of different populations of a rich OB association. We briefly discuss the observational manifestations of this scenario in the supershells around Cyg OB1 and Cyg OB3; Ori OB1/lambda Ori; Car OB1 and Car OB2; and Sco OB1.
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