Near infrared spectroscopy of W 51 IRS-2

Details Near infrared spectroscopy of W 51 IRS-2 Near infrared spectroscopy of W 51 IRS-2

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116..293w&link_type=abstract

Astronomy and Astrophysics, vol. 116, no. 2, Dec. 1982, p. 293-295. Research supported by the Science and Engineering Research

Astronomy and Astrophysics

Astronomy

3

Astronomical Spectroscopy, Infrared Astronomy, Line Spectra, Radio Sources (Astronomy), Milky Way Galaxy, Near Infrared Radiation, Spatial Distribution

Scientific paper

Near-infrared spectra at 2.95-3.5 microns and 3.99-10 microns have been obtained towards W 51 IRS-2 and its surroundings, in order to investigate the spatial variations in intensity of the 3.28 microns unidentified feature and the 4.05 microns Brackett-alpha line. The Br-alpha and 3.28 microns features occupy a broadly similar spatial zone, which is characterised by an unresolved core responsible for most of the emission, and an extended and considerably weaker halo. Grain properties required to excite the 4.28 microns line, the nature of the 3.28 microns emission, and its relation to the source structure are discussed.

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