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Title:
Brackett-gamma mapping observation of RCW38
Authors:
Mizutani, K.; Suto, H.; Takami, H.; Maihara, T.; Sood, R. K.; Thomas, J. A.; Shibai, H.; Okuda, H.
Affiliation:
AA(Kyoto University, Japan), AB(Kyoto University, Japan), AC(Kyoto University, Japan), AD(Kyoto University, Japan), AE(New South Wales, University, Canberra, Australia)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 228, Oct. 1, 1987, p. 721-727. (MNRAS Homepage)
Publication Date:
10/1987
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MAPS, H II REGIONS, HYDROGEN CLOUDS, CONTINUOUS RADIATION, DISTANCE, GRAIN SIZE, HYDROGEN IONS, REFLECTION NEBULAE
Bibliographic Code:
1987MNRAS.228..721M

Abstract

A Brackett-γ map has been obtained in the bright southern H II region RCW 38. The equivalent width of Brackett-γ near the centre is fairly constant and consistent with that expected from recombination theory. A small equivalent width in the periphery of the H II region indicates the presence of some additional continuum emission source, which might be explained by the small grain model applied to reflection nebulae. The existence of a cluster of stars around the central exciting object which has so far been identified as IRS2 is suggested by the comparison of the continuum flux with previous multi-aperture data.

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