Bibcode
Mampaso, A.; Vilchez, J. M.; Riera, A.; Phillips, J. P.; Pismis, P.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 235-244. Research supported by the Universidad Nacional Autonoma de Mexico and Ministerio de Educacion y Ciencia of Spain.
Advertised on:
8
1989
Citations
7
Refereed citations
7
Description
Optical spectroscopy, H-alpha interferometry, and near-IR mapping and
photometry of the bipolar H II region S201 are reported. The
observations are used to place constraints upon the energetics of the H
II region as well as to provide a clearer understanding of the IR
structure. The exciting star is coincident with a central bar of
obscuring material and is of spectral type about O 9.5, and is
associated with the brightest 2.2 micron point emission source. A
detailed investigation of the IR continuum variation suggests a local
extinction A(V) of about 23 mag and an associated hot thermal emission
component with temperature about 700 K. It is concluded that what is
observed is the external ionization of a nearby molecular cloud IC
1848-I.