Optical and infrared observations of the H II region S201

Details Optical and infrared observations of the H II region S201 Optical and infrared observations of the H II region S201

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220..235m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 235-244. Research supported by the Universidad Nac

Astronomy and Astrophysics

Astronomy

6

Fabry-Perot Interferometers, H Ii Regions, Infrared Astronomy, Infrared Photometry, Interstellar Matter, Seeing (Astronomy), Interstellar Extinction, Molecular Clouds, Optical Emission Spectroscopy, Star Formation

Scientific paper

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.

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