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The Sharpless 187 Gas Complex: A Multifrequency Study

We have observed/analyzed the Sh 187 gas complex in the optical (B, V, R photometry and Hα Fabry-Perot interferometry), radio (continuum and H I line at 21 cm, 13 CO), and the IR (IRAS co-add maps). The H II profiles were split in two velocity components over part of the H II region. More than one phenomenon may drive the kinematics of the nebula. A kinematical age of about 2×10 5 yr was derived for the H II region. There is little resemblance between the 1.4 GHz radio continuum and optical emission, indicating that Sh 187 is still enshrouded in the parental cloud